throttle JAGUAR X308 1998 2.G Workshop Manual

Default mode Definitions
MECHANIC
AL LIMP-HOME MODE:

No elec
tronic throttle operation (mechanical
operation for last quarter of pedal travel)
Ma
ximum 25° throttle opening,
depending on adjustment of th rottle mechanical linkage
Engine speed restri
cted to 3000
rpm maximum, by fuel cut-off
High i
dle speed (1200 rpm approx.)
Misfire
at idle, due
to cylinder cut as a means of control
ling idle speed (the misfire will switch cylinders, as the
strategy varies th e cylinder cut)
Cruise (speed) contr
o
l inhibited
REVERSE THROTTLE PROGRESSION ENABLED:
Elec
tronic throttle operation, limited to maximum 25°
Cruise (speed) contr
o
l inhibited
• NOTE: The throttle oper ation uses the same map as for reverse gear.
ENGINE SPEED LIMIT:
Engine runs
normally, up to 3000 rpm
Engine
speed restri
cted to 3000
rpm maximum, by fuel cut-off
Cruise (speed) contr o
l Inhibited
LIMP-HOME UNAVAILABLE:
Cruise (speed) contro
l inhibited
R
e
verse throttle pr
ogression engaged at second occurrence of DTC flagging
Diagnostic Trouble Code (D TC) Index
Performance3000
rpm)
P03
06,
P0307, P0308, P1313, P1314
Ambe
rRestri
cted
Performance
Engine
Speed Limit (runs normally, limited to

3000 rpm)
P03 27,
P0328, P0332, P0333, P1648
Ambe
rRestri
cted
Performance
R e
verse throttle pr
ogression enabled
P1474
AmberRestri
cted
Performance
Engine
Speed Limit (runs normally, limited to

3000 rpm)
P1230
Ambe rRestri
cted
Performance
Engine
Speed Limit (runs normally, limited to

3000 rpm)
P1671
Ambe rRestri
cted
Performance
Engine
Speed Limit (runs normally, limited to

3000 rpm)
P11 12,
P1113
Ambe
rRestri
cted
Performance
Gearbox defau l
t to 4th gear
P1601 (SC on
ly)
AmberRestri
cted
Performance
Gearbox defau l
t to 4th gear
P16
05 (
NA only)
Ambe
rRestri
cted
Performance
Gearbox defau l
t to 4th gear
P0702
Ambe
rRestri
cted
Performance
Gearbox defau l
t to 4th gear
P1795
Ambe
rRestri
cted
Performance
Gearbox defau l
t to 4th gear
P1796
Ambe
rRestri
cted
Performance
Gearbox defau l
t to 4th gear
P1797
Ambe
rRestri
cted
Performance
Gearbox defau l
t to 4th gear
P1605
Ambe
rNoneGearbox defau l
t to 4th gear
P0705 (SC on
ly)
Ambe
rNoneGearbox defau l
t to 4th gear
P0706
Ambe
rNoneGearbox defau l
t to 4th gear
P1720

DT
C
De
scription
Possib
le Source
Acti
on
P0101Mass ai

r flow (MAF) sensor
range/performance
Bl
ocked air filter
Air

intake leak
Engine

breather leak
Throttl

e control malfunction
MAF

sensor to ECM sensing circuit
high resistance
MAF
sensor to ECM sensing circuit
intermittent short circuit to ground
MAF
sensor supply circuit high
resistance
MAF
sensor failure
Chec
k the air filter element, check the

air intake system for leaks,
REFER to Section 303
-1
2 Intake Air
Distribu

tion and Filtering
.
Chec
k the engine breather system for
leaks,
REFER to Section 303
-08
Engine
Emissi

on Control
.
F
or throttle control circuit tests,GO to
Pinpoint Test T.
. Fo
r MAF sensor
circuit tests,GO to Pinpoint Test A.
.
P0102Mass ai
r flow (MAF) sensor sense
circuit low voltage
Bl
ocked air filter
MAF

sensor to ECM sensing circuit
high resistance or open circuit
MAF
sensor to ECM sensing circuit
intermittent short circuit to ground
MAF
sensor supply circuit open
circuit or short circuit to ground
MAF
sensor failure
Chec
k the air filter element,
REFER to Section 303
-1
2 Intake Air
Distribu

tion and Filtering
.
For MAF
sensor circuit tests, GO to
Pinpoint Test A.
.
P0103Mass ai
r flow (MAF) sensor sense
circuit high voltage
MAF
sensor to ECM reference
ground circuit open circuit
MAF
sensor to ECM sensing circuit
short circuit to high voltage
MAF sensor
failure

For MAF
sensor circuit tests,GO to
Pinpoint Test A.
.
P0106BARO ci
rcuit, low voltage
BARO f
ailure (internal ECM fault)
Contact deal
er technical support for
advice on possible ECM failure.
P0107BARO ci
rcuit, high voltage
BARO f
ailure (internal ECM fault)
Contact deal
er technical support for
advice on possible ECM failure.
P0111In
take air temperature (IAT)
sensor range/performance
Bl
ocked air filter
Air

intake leak
Engine

breather leak
IAT sensor to

ECM wiring open
circuit or high resistance
IAT se
nsor to ECM sensing circuit
short circuit to high voltage
IAT sensor fail
ure
Chec
k the air filter element, check the

air intake system for leaks,
REFER to Section 303
-1
2 Intake Air
Distribu

tion and Filtering
.
Chec
k the engine breather system for
leaks,
REFER to Section 303
-08
Engine
Emissi

on Control
.
F
or IAT sensor circuit tests,GO to
Pinpoint Test B.
.
P0112In
take air temperature (IAT)
sensor sense circuit high voltage
(low air temperature)
IAT sensor to
ECM wiring open
circuit or high resistance
IAT se
nsor to ECM sensing circuit
short circuit to high voltage
IAT sensor fail
ure
F
or IAT sensor circuit tests,GO to
Pinpoint Test B.
.
P0113In
take air temperature (IAT)
sensor sense circuit low voltage
(high air temperature)
IAT sensor to
ECM wiring short
circuit to ground
IAT sensor fail
ure
F
or IAT sensor circuit tests,GO to
Pinpoint Test B.
.
P0116E
ngine coolant temperature (ECT)
sensor range / performance
Low/contaminated coolant Therm
ostat failure
ECT se

nsor to ECM sensing circuit
high resistance when hot
ECT se
nsor to ECM sensing circuit
intermittent high resistance
ECT sensor
failure
Che
ck coolant level and condition.
Check thermostat function. For ECT
sensor circuit tests,GO to Pinpoint
Test C.
.
P0117E
ngine coolant temperature (ECT)
sensor sense circuit high voltage
(low coolant temperature)
ECT se
nsor disconnected
ECT se

nsor to ECM sensing circuit
high resistance, open circuit or
short circuit to high voltage
ECT sensor
failure
F
or ECT sensor circuit tests,GO to
Pinpoint Test C.
.
P0118E
ngine coolant temperature (ECT)
sensor sense circuit low voltage
(high coolant temperature)
Engine
overheat condition
ECT se

nsor to ECM wiring short
circuit to ground
ECT sensor
failure
Chec
k engine for overheating. For ECT

sensor circuit tests,GO to Pinpoint
Test C.
.
P0121Thro
ttle position (TP) sensor
circuit rang e/performance
TP sensor
to ECM wiring open
circuit or high resistance
TP se
nsor to ECM sensing circuits 1

or 2 short circuit to high voltage
TP sensor
failure
F
or TP sensor circ
uit tests,GO to
Pinpoint Test D.
, and G
O to Pinpoint
Test K.
.
D
iagnostic Trouble Code (DTC) Index

P0122Throttle
position (TP) sensor 1 low
voltage
TP se ns
or to ECM sensing circuit 1
(TP sensor pin 3) open circuit or
high resistance
TP sensor fail
ure
F
o
r TP sensor circ
uit tests,GO to
Pinpoint Test D.
, and GO
to Pinpoint
Test K.
.
P0123Throttl e
position (TP) sensor 1
high voltage
TP se ns
or to ECM sensing circuit 1
(TP sensor pin 3) short circuit to
high voltage
TP sensor fail
ure
F
o
r TP sensor circ
uit tests,GO to
Pinpoint Test D.
, and GO
to Pinpoint
Test K.
.
P0125En
gine coolant temperature (ECT)
sensor response (for closed loop
fuel control)
Low/contaminated coolant Therm o
stat failure
ECT se
ns
or to ECM sensing circuit
high resistance, open circuit or
short circuit to high voltage
Che c
k coolant level and condition.
Check thermostat function. For ECT
sensor circuit tests,GO to Pinpoint
Test C.
.
P0131Right -
hand H02S sense circuit low
voltage
H02 S
disconnected
H0
2S to
ECM wiring open circuit
H0
2S short ci
rcuit to ground
H0
2S fail
ure
F
or R
ight-hand HO2S circuit tests,GO
to Pinpoint Test E.
.
P0132Right-
hand H02S sense circuit
high voltage
H02 S
sensing circuit short circuit to
high voltage
H0 2S groun
d braided shield open
circuit
H0 2S fail
ure
F
or R
ight-hand HO2S circuit tests,GO
to Pinpoint Test E.
.
P0133Right-
hand H02S sense circuit
slow response
Engine m
isfire
H02
S
disconnected
H0
2S mechanical damage

H0
2S to
ECM wiring intermittent
open circuit
H02 S
sensing circuit short circuit to
high voltage
H02S short ci
rcuit to ground
H02S groun

d braided shield open
circuit
H0 2S heater circuit faul
t
Exhaus
t leak

Low e
x
haust temperature
Injector fl
ow parti
ally blocked
Catal
y
st efficiency decrease
H0
2S fail
ure
Chec
k for 'en
gine misfire detected'
DTCs. For HO2S circuit tests,GO to
Pinpoint Test E.
.G
O to Pinpoint Test
F.
. Check for exhaust leaks,
REF
ER to Section 309
-00
Ex
haust
Sy
ste
m
.
Chec k inje
ctors,
REFER to Section 303
-04 Fu
el
Charging and Cont

rols
.
P0135Right
-
hand H02S heater circuit
malfunction
H02 S
disconnected
H0
2S h
eater power supply open
circuit
H0 2S heater to ECM wi
ring short
circuit or open circuit
H0 2S heater fai
lure
F
o
r right-hand HO2S heater circuit
tests,GO to Pinpoint Test F.
.
P0137Right-
hand catalyst monitor
sensor sense circuit low voltage
Catal y
st monitor sensor
disconnected
Catal y
st monitor sensor to ECM
wiring open circuit
Catal y
st monitor sensor short
circuit to ground
Cat a
lyst monitor sensor failure
F
or ri
ght-hand catalyst monitor sensor

circuit tests,GO to Pinpoint Test G.
.
P0138Right -
hand catalyst monitor
sensor sense circuit high voltage
Catal y
st monitor sensor sensing
circuit short circuit to high voltage
Catalyst
monitor sensor ground
braided shield open circuit
Cata
lyst monitor sensor failure
F
or ri
ght-hand catalyst monitor sensor

circuit tests,GO to Pinpoint Test G.
.
P0140Right -
hand catalyst monitor
sensor sense circuit no activity
Catal y
st monitor sensor
disconnected
Catal y
st monitor sensor
mechanical damage
Catal y
st monitor sensor to ECM
wiring open circuit
Catal y
st monitor sensor sensing
circuit short circuit to high voltage
Cataly
st monitor sensor short
circuit to ground
Catalyst
monitor sensor ground
braided shield open circuit
F or ri
ght-hand catalyst monitor sensor

circuit tests, GO to Pinpoint Test G.
.
Check f o
r exhaust leaks,
REFER to Section 309
-00 Ex
haust
Sy
ste
m
.
Chec k inje
ctors,
REFER to Section 303
-04 Fu
el
Charging and Con
t
rols
.

leak
/blockage
EVAP valve failure


P0444Evaporati

ve emissions system
(EVAP) valve circuit open circuit
EVAP t
o ECM drive circuit open
circuit or high resistance
EVAP failu
re
F
or evaporative emissions pinpoint
tests,
REFER to Section 303
-1
3 Evaporative

Emiss
ions
.
P0445Evaporati

ve emissions system
(EVAP) valve circuit short circuit
E
VAP to ECM drive circuit short
circuit to ground
EVAP failu
re
F
or evaporative emissions pinpoint
tests,
REFER to Section 303
-1
3 Evaporative

Emiss
ions
.
P0447Cani

ster close valve (CCV) circuit
open circuit
CCV to ECM
drive circuit open
circuit, high resi stance or short
circuit to ground
EVAP failu
re
F
or evaporative emissions pinpoint
tests,
REFER to Section 303
-1
3 Evaporative

Emiss
ions
.
P0448Cani

ster close valve (CCV) circuit
short circuit
CCV to
ECM drive circuit short
circuit to high voltage
CCV failure

F
or evaporative emissions pinpoint
tests,
REFER to Section 303
-1
3 Evaporative

Emiss
ions
.
P0452F

uel tank pressure (FTP) sensor
circuit low voltage
FTP
sensor disconnected
FTP

sensor to ECM sense circuit
open circuit or short circuit to
ground
FTP sen
sor to ECM power supply
circuit open circuit or short circuit
to ground
F
TP sensor failure
F
or evaporative emissions pinpoint
tests,
REFER to Section 303
-1
3 Evaporative

Emiss
ions
.
P0453F

uel tank pressure (FTP) sensor
circuit high voltage
FTP
sensor to ECM signal ground
circuit open circuit
F
TP sensor to ECM wiring (supply,
sense, signal, ground) short circuit
to each other
FTP
sensor to ECM sense circuit
short circuit to high voltage
F
TP sensor failure
F
or evaporative emissions pinpoint
tests,
REFER to Section 303
-1
3 Evaporative

Emiss
ions
.
P0460Fue

l level sense signal
performance
Fue
l level sensor
to instrument
cluster circuits in termittent short or
open circuit
F
uel level sensor failure
Instrument cluster
faul
t (incorrect
fuel level data)
F
or fuel level sensor
circuit tests,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P0506Idl

e rpm lower than expected
Ai
r intake blockage
Acce

ssory drive overload
(defective/siezed component)
Thr
ottle valve stuck closed
Throttl

e assembly failure
Chec
k the air intake system.
REFER to Section 303
-1
2 Intake Air
Distribu

tion and Filtering
.
Check t
he accessory drive
components,
REFER to Section 303
-0
5 Accessory
Dr

ive
.
F
or throttle body information,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P0507Idle rpm

higher than expected
Inta
ke air leak between MAF
sensor and throttle
Inta
ke air leak between throttle
and engine
Engine
breather leak
Cruis

e (speed) control vacuum
failure
Thr
ottle valve stuck open
Throttl

e assembly failure
Chec
k the air intake system.
REFER to Section 303
-1
2 Intake Air
Distribu

tion and Filtering
.
Chec
k the engine breather system,
REFER to Section 303
-08
Engine
Emissi

on Control
.
F
or cruise (speed) control information,


REFER to Section 310
-03
Speed
Control.
F
or throttle body information,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P0560Vehicle voltage

malfunction
ECM battery
power supply open
circuit, high resistance
F
or ECM power supply circuit tests,
GO to Pinpoint Test AD.
.
P0566Cruise (speed) contr
ol
CANCEL
switch ON fault
Cru
ise (speed) control switches
internal steering wheel short circuit
to ground
For cru
ise (speed) control circuit tests,


REFER to Section 310
-03
Speed

P1122Acce
lerator pedal position (APP)
sensor circuit 'A' low voltage
A
PP sensor to ECM sense circuit
'A' (sensor pin 5) open circuit or
high resistance
Sensor power su
pply fault
APP s

ensor failure
For APP
sensor circuit tests,GO to
Pinpoint Test R.
, andG
O to Pinpoint
Test S.
.
P1123Acce
lerator pedal position (APP)
sensor circuit 'A' high voltage
A
PP sensor to ECM sense circuit
'A' (sensor pin 5) short circuit to
high voltage
APP s
ensor failure
For APP
sensor circuit tests, GO to
Pinpoint Test R.
, and G
O to Pinpoint
Test S.
.
P1221Acce
lerator pedal position (APP)
sensor circuit 'B'
range/performance
A
PP sensor to ECM sense circuit
'B' (sensor pin 3) open circuit,
short circuit or high resistance
Sensor power su
pply fault
Sensor r

eference ground fault
APP s

ensor failure
For APP
sensor circuit tests,GO to
Pinpoint Test R.
, andG
O to Pinpoint
Test S.
.
P1222Acce
lerator pedal position (APP)
sensor circuit 'B' low voltage
A
PP sensor to ECM sense circuit
'B' (sensor pin 3) open circuit or
high resistance
Sensor power su
pply fault
APP s

ensor failure
For APP
sensor circuit tests,GO to
Pinpoint Test R.
, andG
O to Pinpoint
Test S.
.
P1223Acce
lerator pedal position (APP)
sensor circuit 'B' high voltage
A
PP sensor to ECM sense circuit
'B' (sensor pin 3) short circuit to
high voltage
APP s
ensor failure
For APP
sensor circuit tests,GO to
Pinpoint Test R.
, andG
O to Pinpoint
Test S.
.
P1224Throttl
e control position error
Thro
ttle position adaptations not
performed after ba ttery disconnect
TP se
nsor disconnected
TP se

nsor to ECM sense circuits
open circuit, hi gh resistance
Throttl
e motor power relay failure
Throttl

e motor power relay to ECM
circuit fault
Throttl
e motor power relay power
supply open circuit
ECM ground circuit faul
t (relay coil
drive)
Th
rottle motor to ECM drive circuits

open circuit, short circuit, high
resistance
Throttl
e motor failure
Throttl

e assembly failure
Carry
out throttle adaptation
procedure. For TP sensor circuit
tests,GO to Pinpoint Test D.
, andG
O
to Pinpoint Test K.
. F
or throttle motor

circuit tests,GO to Pinpoint Test T.
.
F
or throttle body information,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P1226Mechanica

l guard sensor
range/performance
Mechanica
l guard sensor to ECM
sense circuit open circuit, short
circuit or high resistance
Sensor power su
pply fault
Sensor r

eference ground fault
Mechanica

l guard sensor failure
Mechanica

l guard actuator
seized/spring broken
For mech
anical guard circuit tests,GO
to Pinpoint Test U.
. F
or sensor power
supply circuit tests,GO to Pinpoint
Test V.
. F
or sensor ground circuit
tests,GO to Pinpoint Test W.
. For
throttle body i
nformation,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P1227Mechanica

l guard sensor circuit
low voltage
Mechanica
l guard sensor to ECM
sense circuit open circuit or high
resistance
Sensor power su
pply fault
Mechanica

l guard sensor failure
For mech
anical guard circuit tests,GO
to Pinpoint Test U.
. F
or sensor power
supply circuit tests,GO to Pinpoint
Test V.
. F
or throttle body
information,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P1228Mechanica

l guard sensor circuit
high voltage
Mechanica
l guard sensor to ECM
sense circuit short circuit to high
voltage
Mechanica
l guard sensor failure
For mech
anical guard circuit tests,GO
to Pinpoint Test U.
. F
or throttle body
information,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P1229Throttl

e motor control circuit
mallfunction
Throttl
e motor disconnected
Th

rottle motor to ECM drive circuits

short circuit or open circuit
Throttl
e motor failure
Fo
r throttle motor circuit tests,GO to
Pinpoint Test T.
.
P1230Fue
l pump relay malfunction.
NOTE. This DTC covers the S/C
system fuel pump 1
F
uel pump relay failure
F

uel pump to ECM circuit fault
F

uel pump relay coil power supply
F
or fuel pump relay circuit tests,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.

op
en circuit
ECM ground circuit faul
t (relay coil

drive)
P1235Vacuu m
switching valve (VSV) 1
circuit range/ performance
(mechanical guard position)
Vac u
um leak/blockage between the

throttle elbow and the throttle
vacuum actuator
Vacuu m
actuator failure
Mechanica
l
guard actuator
seized/spring broken
Carr y out mechanical checks
for
vacuum leak/blockag e, failed vacuum
actuator, and broken /siezed actuator
spring.
P1236Vacuu m
switching valve (VSV) 1
(vacuum) circuit failure
VSV 1 disconne cted

VSV 1 to ECM drive circu
i
t high
resistance, open circuit or short
circuit
VSV 1 powe r supply open
circuit
VSV 1 failu
r
e
For VSV tests,

REF
ER to Section 310
-03
Sp
eed
Control.
P1237Vacuu
m
switching valve (VSV) 2
(atmosphere) circuit failure
VSV 2 disconne cted

VSV 2 to ECM drive circu
i
t high
resistance, open circuit or short
circuit
VSV 2 power supply open
circuit
VSV 2 failu
r
e
For VSV tests,

REF
ER to Section 310
-03
Sp
eed
Control.
P1238Vacuu
m
switching valve (VSV) 3
(release) circuit failure
VSV 3 disconne cted

VSV 3 to ECM drive circu
i
t high
resistance, open circuit or short
circuit
VSV 3 powe r supply open
circuit
VSV 3 failu
r
e
For VSV tests,

REF
ER to Section 310
-03
Sp
eed
Control.
P1240Sensor r
e
fere
nce voltage
malfunction (throttle sensors, fuel
tank pressure se nsor) (ECM pins
EM10-21; EM11-8)
ECM t o
sensors reference voltage
short circuit to ground, short circuit
to high voltage, op en circuit, high
resistance
TP sensor , pedal position and
mechan
ical guard sensor(s), fuel
tank pressure sens or failure(s)
Fo
r sensor reference voltage circuit
tests,GO to Pinpoint Test V.
.
P1241Sensor re
ferenc
e voltage low
(throttle sensors, fuel tank
pressure sensor) (ECM pins EM10-
21; EM11-8)
ECM t o
sensors reference voltage
short circuit to ground
TP sensor , APP
and mechanical
guard sensor(s), fuel tank pressure
sensor failure(s)
F o
r sensor reference voltage circuit
tests,GO to Pinpoint Test V.
.
P1242Sensor re
ferenc
e voltage high
(throttle sensors, fuel tank
pressure sensor) (ECM pins EM10-
21; EM11-8)
ECM t o
sensors reference voltage
circuit open circuit, high resistance,
short circuit to high voltage
TP sensor , APP
and mechanical
guard sensor(s), fuel tank pressure
sensor failure(s)
F o
r sensor reference voltage circuit
tests,GO to Pinpoint Test V.
.
P1243Sensor re
ference ground
malfunction (throttle sensors, fuel
tank pressure sensor, ECT sensor,
IAT sensor, IAT sensor 2) (ECM
pins EM10-20; EM11-12)
ECM t o
sensors reference ground
circuit open circuit, high resistance
Throttle sensors, fuel
tank pressure

sensor, ECT sensor, IAT sensor,
IAT sensor 2 failures
F o
r sensor reference ground circuit
tests,GO to Pinpoint Test W.
.
P1245Engine crank signal low voltage Starter relay coi
l to ECM/BPM
circuit open circuit
For en gin
e crank circuit tests,GO to
Pinpoint Test X.
.
P1246Engine crank signal high voltage Starter relay coi
l to ECM/BPM
circuit short circuit to B+ voltage
B P
M failure
For en
gin
e crank circuit tests,GO to
Pinpoint Test X.
.
P1250Engine load
malfunction
Air in
take leak
Engine breath

er leak
TP sens

or circuit fault (DTC P0121)

Throttle
valve spring failure
Check air i
ntake system for leaks,
REFER to Section 303
-12
Intake Air
Distribution and Filterin

g
.
Check engi
ne breather system for
leaks,
REFER to Section 303
-08 En
gine
Emissi
on Control.
Se e
pinpoint test for P0121. For
throttle body information,
REFER to Section 303
-04 Fu
el
Charging and Con
t
rols
.
P1251Thr
o
ttle position malfunction
(engine off)
TP sensor to ECM wiri
ng open
circuit or high resistance
F o
r TP sensor circ
uit tests,GO to
Pinpoint Test D.
, andGO to Pinpoint

TP se
nsor to ECM sensing circuits
('1' or '2') short circuit to high
voltage
TP sensor
failure
Throttl

e motor disconnected
Th

rottle motor to ECM drive circuits

short circuit or open circuit
Throttl
e motor failure
Throttl

e assembly failure
Test
K. . F
or throttle motor circuit
tests,GO to Pinpoint Test T.
. For
throttle body i
nformation,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P1252Mec

hanical gu
ard position
malfunction (cruise (speed)
control)
VSV 1, 2, 3 v
acuum and/or
electrical circuit fault(s) open
circuit, short circuit or high
resistance
Mechanica
l guard sensor to ECM
sense circuit
Mechanica
l guard sensor failure
Mechanica

l guard actuator
siezed/spring broken
Throttl
e vacuum actuator fault
Se
e pinpoint tests for components
listed.
P1253Mec
hanical gu
ard position
malfunction (engine off)
VSV 1, 2, 3 v
acuum and/or
electrical circuit fault(s)
Mechanica
l guard sensor to ECM
sense circuit
Mechanica
l guard sensor failure
Mechanica

l guard actuator
siezed/spring broken
Throttl
e vacuum actuator fault
Se
e pinpoint tests for components
listed.
P1260Se
curity input malfunction
K
TM to ECM circuit short circuit,
high resistance or open circuit
KTM failu
re
F
or KTM circuit tests,GO to Pinpoint
Test Y.
.
P1313M
isfire rate catalyst damage,
right-hand. NOTE: This DTC will
flag only when accompanied by a
random or individual cylinder
misfire DTC; P0300, P0301 to
P0304
R
efer to possible causes for P0300-P0308
R
efer to actions for P0300-P0308.
P1314Mi

sfire rate catalyst damage, left-
Hand: NOTE. This DTC will flag
only when accompanied by a
random or individual cylinder
misfire DTC; P0300 to P0308
P1316M
isfire excess emission. NOTE:
This DTC will flag only when
accompanied by an individual
cylinder misfire DTC; P0300 to
P0308
P1336Cranksh
aft position
(CKP) sensor /
camshaft position (CMP) sensor
synchronization malfunction
CKP s
ensor/CMP sensor
disconnected
CKP sensor/CM
P sensor gap
incorrect/foreign matter on sensor
face
CKP s
ensor/CMP sensor sensing
circuit open circuit, short circuit to
ground, short circuit to high
voltage
CKP s
ensor/CMP sensor failure
F
or CKP sensor circ
uit tests,GO to
Pinpoint Test N.
. For CM
P sensor
circuit tests,GO to Pinpoint Test O.
.
P1367Ignit
ion monitor (ignition module
1)
Ignition modu
le
1 disconnected
Ignition modul
e 1 to ECM circuits
open circuit, short circuit to ground
or short circuit to B+ voltage
Ignition modul
e 1 ground circuit
fault
Ignition coil
relay failure
Ignition coil

open/short circuit
Ignition modul

e 1 failure
F
or ignition circuit tests,
REFER to Section 303
-07
Engine
Ignition.
P1368Ignit

ion monitor (ignition module
2)
Ignition modu
le
2 disconnected
Ignition modul
e 2 to ECM circuits
open circuit, short circuit to ground
F
or ignition circuit tests,
REFER to Section 303
-07
Engine
Ignition.

Pinpoint Tests
f
ailure
P1611Thr

ottle angle malfunction
TP sensor
circuit fault (refer to
P0121)
APP sensor circuit faul
t (refer to
P0121)
Throttl
e assembly failure
ECM failu

re
Se
e pinpoint tests for components
listed. For throttle body information,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
Contact deal
er technical support for
advice on possible ECM failure.
P1612Throttl
e offset malfunction
TP sensor
circuit fault (refer to
P0121)
APP sensor circuit faul
t (refer to
P0121)
Throttl
e assembly failure
ECM failu

re
Se
e pinpoint tests for components
listed. For throttle body information,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
Contact deal
er technical support for
advice on possible ECM failure.
P1637CAN AB
S/TCCM token missing
CAN
open circuit fault - ABS/TCCM
to ECM
CAN s
hort circuit fault
ABS/TCCM failu

re
ECM failu

re
F
or network circuit tests,
REFER to Section 418
-00
Module
Comm

unications Network
.
P1638CAN INST token missingCAN

open circuit fault - INST to
ECM
CAN s
hort circuit fault
INST

failure
ECM failu

re
F
or network circuit tests,
REFER to Section 418
-00
Module
Comm

unications Network
.
P1642CAN c

ircuit malfunction
CAN s
hort circuit fault
Control modul

e failure - check for
additional logged DTCs to locate
control module source
F
or network circuit tests,
REFER to Section 418
-00
Module
Comm

unications Network
.
P1643CAN TC

M token missing
CAN
open circuit fault - TCM to
ECM
CAN s
hort circuit fault
TCM failure


ECM failu

re
F
or network circuit tests,
REFER to Section 418
-00
Module
Comm

unications Network
.
P1646F

uel pump 2 relay malfunction.
NOTE: This DTC applies only to
the S/C fuel pump 2
F
uel pump 2 relay failure
F

uel pump 2 relay to ECM circuit
fault
F
uel pump 2 relay coil power
supply open circuit
ECM ground circuit faul
t (relay coil
drive)
F
or fuel pump 2 relay circuit tests,
REFER to Section 303
-04
Fuel
Charging and Con

trols
.
P

INPOINT TEST A : DTC P0101, P0102, P0103; MASS AIR FLOW (MAF) SENSOR
RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
•
NOTE: Before commencing this
test, check the air filter for blockage, the engine air inta ke and breather systems for
leaks, and the TPS for additional DTCs.
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
A1: CHECK

THE MAF SENSOR SENS
E CIRCUIT FOR HIGH RESISTANCE
Di
sconnect the battery negative terminal.
1
D

isconnect the ECM electrical connector, EM12.
2
Di

sconnect the MAF sensor electrical connector, PI35.
3
Meas

ure the resistance between EM12, pin 13 (GY) and PI35, pin 02 (GY).
4
Is th

e resistance greater than 5 ohms?
Yes REPAIR the high resistance circuit. For additional information, refer to the wiring diagrams. CLEAR the
DTC. TEST the system for normal operation.
No GO to A2
.
A2: CHECK
THE MAF SENSOR SENSE CI
RCUIT FOR SHORT TO HIGH VOLTAGE
R
econnect the battery negative terminal.
1
Turn the ignition swi

tch to the ON
position.
2
M
easure the voltage between the MAF sensor electrical connector, PI35, pin 02 (GY) and GROUND.
3
Is th

e voltage greater than 3 volts?

Is th
e voltage greater than 3 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to B3
.
B3: CHECK
THE IAT SENSOR SENS
E CIRCUIT FOR SHORT TO GROUND
Turn the ignition swi
tch to the OFF
position.
1
Meas
ure the resistance between PI35, pin 03 (UP) and GROUND.
2
Is

the resistance less than 10,000 ohms?
Yes
REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No INSTALL a new MAF sensor.
REFER to Mass Air Flow (MAF) Sensor

in this section.
CLEAR the DTC. TEST the system for normal operation.
PI
NPOINT TEST C : DTC P0116, P0117, P0118
; ENGINE COOLANT TEMPERATURE (ECT) SENSOR
RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
•
NOTE: Before commencing this
test, check the coolant level and condition, check the operation of the thermostat, rectify
as necessary.
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
C1: CHECK THE ECT SEN

SOR SENS
E CIRCUIT FOR HIGH RESISTANCE
Di
sconnect the battery negative terminal.
1
D

isconnect the ECM electrical connector, EM11.
2
D

isconnect the ECT sensor electrical connector, PI04.
3
Meas

ure the resistance between EM11, pin 09 (UY) and PI04, pin 02 (UY).
4
Is th

e resistance greater than 5 ohms?
Yes
REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No GO to C2
.
C2: CHECK THE ECT SEN
SOR SENSE CI
RCUIT FOR SHORT TO HIGH VOLTAGE
R
econnect the battery negative terminal.
1
Turn the ignition swi

tch to the ON
position.
2
Meas
ure the voltage between PI04, pin 02 (UY) and GROUND.
3
Is th

e voltage greater than 3 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to C3
.
C3: CHECK THE ECT SEN
SOR SENSE CIRCUIT FOR SHORT TO GROUND
Turn the ignition swi

tch to the OFF
position.
1
Meas
ure the resistance between PI04, pin 02 (UY) and GROUND.
2
Is

the resistance less than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No INSTALL a new ECT sensor. REFER to Section 303
-0
3A Engine Cooling
/
30
3
-0
3B Supercharger
Coo

ling
. CLEA
R the DTC. TEST the sy
stem for normal operation.
P
INPOINT TEST D : DTC P0121, P0122,
P0123; THROTTLE POSITION (TP) SENSOR
RANGE/PERFORMANCE, HIGH/LOW VOLTAGE
TE
ST
CONDITIONS
D
ETAILS/RESULTS/ACTIONS
D1: CHECK

THE TP SENSOR SENS
E CIRCUIT FOR HIGH RESISTANCE
Di
sconnect the battery negative terminal.
1

Di
sconnect the ECM electrical connector, EM11.
2
Disc
onne
ct the TP sensor electrical connector, PI06.
3
Meas
ure t
he resistance between EM11, pin 11 (U) and PI06, pin 03 (U).
4
Is th
e res
istance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No GO to D2
.
D2
: CHECK THE TP SENSOR SENSE CIRCUIT FOR SHORT TO HIGH VOLTAGE
Re

connect the battery negative terminal.
1
Turn the ignition swit

ch to the ON
position.
2
Me
asure the voltage between PI06, pin 03 (U) and GROUND.
3
Is the volt

age greater than 5 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to D3
.
D3: CH
ECK THE TP SENSOR SENSE CIRCUIT FOR SHORT TO GROUND
Turn the ignition swi
t
ch to the OFF
position.
1
Measure t
he resistance between PI06, pin 03 (U) and GROUND.
2
Is
t
he resistance less than 10,000 ohms?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No INSTALL a new TP sensor.
REFER to Throttle Position (TP) Sensor
in this
section.
CLEAR the DTC. TEST the syst em for normal operation.
PI
NPOINT TEST E : DTC P0131, P0132, P0133; RIGHT-HAND H02S LOW/HIGH VOLTAGE, SLOW
RESPONSE
•
NOTE: Before commencing this test, check the sensor connect
ions and harness, check for exhaust leaks, engine misfire,
etc. See 'visual inspection ch art' and 'possible causes'.
TES
T
CONDITIONS
D E
TAILS/RESULTS/ACTIONS
E1
: CHECK THE H02S
SENSE CI
RCUIT FOR HIGH RESISTANCE
Disc
onnect the battery negative terminal.
1
D
is
connect the H02S electrical connector, EM21.
2
Disc
onne
ct the ECM electrical connector, EM12
3
Meas
ure t
he resistance between EM21, pin 03 (R) and EM12, pin 15 (R).
4
Is th
e res
istance greater than 5 ohms?
Yes REPAIR the high resistance circui t. For additional information, refer to the wiring diagrams. CLEAR
the DTC. TEST the system for normal operation.
No GO to E2
.
E2: CHECK THE H02S
SENSE CIRCUI
T FOR SHORT TO HIGH VOLTAGE
Re
connect the battery negative terminal.
1
Turn the ignition swi
t
ch to the ON
position.
2
Measure t
he voltage between EM12, pin 15 (R) and GROUND.
3
Is th
e volt
age greater than 3 volts?
Yes REPAIR the short circuit. For addi tional information, refer to the wiring diagrams. CLEAR the DTC.
TEST the system for normal operation.
No GO to E3
.
E3: CHECK THE H02S
SENSE CI
RCUIT FOR SHORT TO GROUND
Turn the ignition swi t
ch to the OFF
position.
1
Measure t
he resistance between EM12, pin 15 (R) and GROUND.
2