ECU TOYOTA AVENSIS 2005 Service Owner's Guide

± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±303
AVENSIS REPAIR MANUAL (RM1018E)Hand±held Tester DisplayDiagnostic Note Normal Condition *
1Measurement Item/Range
(Display)
ACCEL IDL POS
Whether or not accelerator pedal
position sensor is detecting idle/
ON or OFF
Idling: ON

THROTTLE IDL POS
Whether or not throttle position
sensor is detecting idle/
ON or OFF
Idling: ON

FAIL #1Whether or not fail safe function is
executed/ ON or OFFETCS has failed: ON

FAIL #2Whether or not fail safe function is
executed/ ON or OFFETCS has failed: ON

THROTTLE INITIALThrottle fully closed learned value
Min.: 0 V, Max.: 5 V0.5 to 0.9 V

ACCEL LEARN VAL
Accelerator fully closed learned
value
Min.: 0 V, Max.: 5 V
0.4 to 1.4 V

THROTTLE MOTThrottle motor current
Min.: 0 A, Max.: 20 AIdling: 0 to 3.0 A

O2S B1 S1
Heated oxygen sensor output volt-
age for bank 1 sensor 1/
Min.: 0 V, Max.: 1.0 V
O2S B1 S2
Heated oxygen sensor output volt-
age for bank 1 sensor 2/
Min.: 0 V, Max.: 1.0 V
Driving (50 km/h, 31 mph):
Performing the INJ VOL or A/F
CONTROL function of the ACTIVE
O2S B2 S1
Heated oxygen sensor output volt-
age for bank 2 sensor 1/
Min.: 0 V, Max.: 1.0 V
Driving (50 km/h, 31 m h):
0.1 to 0.9 VCONTROL function of the ACTIVE
TEST enables the user to check
the voltage output of each sensor.
O2S B2 S2
Heated oxygen sensor output volt-
age for bank 2 sensor 2/
Min.: 0 V, Max.: 1.0 V
SHORT FT #1Short term fuel trim of bank 1/
Min.: ±100 %, Max.: 100%0 20 %
This item is the short±term fuel
compensation used to maintain the
air±fuel ratio at stoichiometric air±
fuel ratio
LONG FT #1Long term fuel trim of bank 1/
Min.: ±100 %, Max.: 100 %0 20 %
This item is the overall fuel com-
pensation carried out in long±term
to compensate for a continual
deviation of the short±term fuel
trim from the central value.
TOTAL FT #1
Total fuel trim bank 1:
Average value for fuel trim system
of bank 1/
Min.: 0.5, Max.: 1.496
Idling: 0.5 to 1.4

SHORT FT #2Short term fuel trim of bank 2/
Min.: ±100 %, Max.: 100 %0 20 %
This item is the short±term fuel
compensation used to maintain the
air±fuel ratio at stoichiometric air±
fuel ratio
LONG FT #2Long term fuel trim of bank 2/
Min.: ±100 %, Max.: 100 %0 20 %
This item is the overall fuel com-
pensation carried out in long±term
to compensate for a continual
deviation of the short±term fuel
trim from the central value.
TOTAL FT #2
Total fuel trim bank 2:
Average value for fuel trim system
of bank 2/
Min.: 0.5, Max.: 1.496
Idling: 0.5 to 1.4

A81703
From
Speed SensorSkid
Control
ECU4±Pulse
Combination
MeterECM 4±Pulse
A76866
Combination MeterECM
C11V±W
SPD 17
V±W
E10 J/C
18 H
J10
(LHD)J20H
(RHD)H
J10
(LHD)J20H
(RHD)
± DIAGNOSTICSSFI SYSTEM (1AZ±FSE)
05±453
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0500 VEHICLE SPEED SENSOR ºAº
CIRCUIT DESCRIPTION
The speed sensor for skid control ECU detects the wheel speed and sends the appropriate signals to the
skid control ECU.
The skid control ECU converts these signals into a 4±pulse signal and outputs it to the combination meter.
After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit in-
side the combination meter,it is then transmitted to the ECM. The ECM determines the vehicle speed based
on the frequency of these pulse signals.
DTC No.DTC Detection ConditionTrouble Area
P0500
No vehicle speed sensor signal to ECM under the following
condition (1 trip (A/T) or 2 trip (M/T) detection logic):
(a) Vehicle is being driven

Combination meter

Open or short in speed sensor circuit

Vehicle speed sensor

ECM

Skid control ECU

Clutch or brake slips or gear is broken
WIRING DIAGRAM
05CJ6±01

05±546
±
DIAGNOSTICS ECD SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E) P0380
(05±622)
Glow Plug/Heater Circuit ºAº

Open or short in glow plug circuit

Glow fuse

Glow relay

Glow plug

ECM

P0400
(05±629)Exhaust Gas Recirculation Flow
EGR valve assy

EGR passage
P0403
(05±629)Exhaust Gas Recirculation Con-
trol Circuit
EGR assage

Open or short in EGR circuit

ECM
P0488
(05±633)Exhaust Gas Recirculation
Throttle Position Control Range/
Performance
Open or short in intake shutter circuit

Open or short in fully opened switch circuit

Intake shutter

ECM

P0500
(05±640)Vehicle Speed Sensor ºAº

Open or short in speed sensor circuit

Speed sensor

Combination meter

ECM

Skid control ECU

P0504
(05±643)Brake Switch ºAº/ºBº Correlation

Short in stop lamp switch signal circuit

Stop lamp switch

ECM


P0560
(05±647)System Voltage
Open in back±up power source circuit

ECM
P0606
(05±650)ECM/PCM Processor

ECM



P0607
(05±650)Control Module Performance

ECM

P0622
(05±651)Generator Field ºFº Terminal Cir-
cuit

Open in generator circuit

Generator

Drive belt

ECM

P0627
(05±655)Fuel Pump Control Circuit / Open

Open or shot in suction control valve circuit

Suction control valve

ECM

P1229
(05±563)Fuel Pump System

Short in supply pump (suction control valve) circuit

Suction control valve

ECM

P1238
(05±658)Injector Malfunction

Injector

EDU (P0200 is set simultaneously)

Open or short in engine wire (P0200 is set simultaneously)

Connector connection (P0200 is set simultaneously)

Compression pressure

Valve clearance

Valve timing

ECM

P1251
(05±612)Turbo/Super Charger Overboost
Condition (Too High)

VRV

Open or short in VRV circuit

Turbocharger

EGR valve

Vacuum hose

ECM

P1271
(05±663)Fuel Regulator Circuit Malfunc-
tion (EDU Drive)

Open or short in pressure discharge valve circuit

Open or short in pressure discharge valve it self

EDU

ECM

P1272
(05±663)Fuel Pressure Regulator Mal-
function

Open or short in pressure discharge valve circuit (P1271 is set
simultaneously)

Pressure discharge valve

Supply pump

ECM


05CPB±01
FI2547
A76859
Hand±held
Tester
DLC3
05±528
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
PRE±CHECK
1.DIAGNOSIS SYSTEM
(a)Description for Euro±OBD

When troubleshooting Euro±OBD vehicles, the
only difference from the usual troubleshooting pro-
cedure is that you connect an OBD scan tool com-
plying with ISO 15031±4 or a hand±held tester to
the vehicle, and read the various data output from
the vehicle's ECM.

Euro±OBD regulations require that the vehicle's
on±board computer illuminates the check engine
warning light (CHK ENG) on the instrument panel
when the computer detects a malfunction in the
emission control system / components or in the
power train control components which affect vehicle
emissions, or a malfunction in the computer. In addi-
tion to an illumination of the CHK ENG when a mal-
function is detected, the applicable Diagnostic
Trouble Codes (DTCs) prescribed by ISO 15031±4
are recorded in the ECM memory (See page
05±544). If the malfunction does not reoccur in 3
consecutive trips, the CHK ENG goes off automati-
cally but the DTCs remain recorded in the ECM
memory.

To check the DTCs, connect the OBD scan tool or
hand±held tester to Data Link Connector 3 (DLC3)
on the vehicle. The OBD scan tool or hand±held
tester also enables you to erase the DTCs and
check the freeze frame data and various forms of
engine data. (For operating instructions, see the
OBD scan tool's instruction book.)

DTCs include ISO controlled codes and manufac-
turer controlled codes. ISO controlled codes must
be set as prescribed by the ISO, while manufacturer
controlled codes can be set freely by the manufac-
turer within the prescribed limits (See DTC chart on
page 05±544).

The diagnosis system operates in the normal mode
during normal vehicle use. It also has a check (test)
mode for technicians to simulate malfunction symp-
toms and troubleshoot. Most DTCs use 2 trip detec-
tion logic* to prevent erroneous detection, and to
ensure a thorough malfunction detection. By
switching the ECM to the check mode using hand±
held tester when troubleshooting, a technician can
cause the CHK ENG to illuminate for a malfunction
that is only detected once or momentarily (Hand±
held tester only) (See step 3).

05±572
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
3READ VALUE OF HAND±HELD TESTER(COMPENSATION OF INJECTION QUANTIFY BETWEEN CYLINDERS)
(a)Connect the hand±held tester to the DLC3.
(b)Turn the ignition switch ON and push the hand±held tester main switch \
ON.
(c)Start the engine.
(d)Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / INJ VOLUME FBº and read its value
displayed on the hand±held tester.
Result:
STD ± 3 to 3 mm
3/st
Maximum ± 4.9 to 4.9 mm
3/st
NGREPLACE INJECTOR ASSY (See page 11±60)
OK
4 PERFORM ACTIVE TEST USING HAND±HELD TESTER(FUEL LEAK TEST)
(a) Connect the hand±held tester to the DLC3.
(b) Start the engine.
(c) Turn the ignition switch ON and push the hand±held tester main switch \
ON.
(d) Select the item ºDIAGNOSIS / OBD/MOBD / ACTIVE TEST / FUEL LEAK TESTº\
.
(e) Check for fuel leaks in high±pressure area. GO
CHECK DTC OUTPUT RECUR (DTC P0093 OUTPUT AGAIN)
HINT:

After clearing the DTC, let the engine idle for 1 minute and then run it\
at 2,500 rpm for 30 seconds.

At the same time, use the hand±held tester to confirm the fuel pressure\
inside the common rail from
the ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / COMN RAIL PRESSº.
Internal fuel pressure of the common rail must be stable under each driv\
ing condition.
Engine SpeedFuel Pressure (MPa)
IdlingApprox. 30 to 40
Running the engine at 2,500 rpm (No engine load)Approx. 50 to 100

A79413
From
Speed SensorSkid
Control
ECU4±Pulse
Combination
Meter4±Pulse
ECM 05±640
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
DTC P0500 VEHICLE SPEED SENSOR ºAº
CIRCUIT DESCRIPTION
The speed sensor for skid control ECU detects the wheel speed and sends the appropriate signals to the
skid control ECU.
The skid control ECU converts these signals into a 4±pulse signal and outputs it to the combination meter.
After this signal is converted into a more precise rectangular waveform by the waveform shaping circuit in-
side the combination meter, it is then transmitted to the ECM. The ECM determines the vehicle speed based
on the frequency of these pulse signals.
DTC No.DTC Detection ConditionTrouble Area
P0500
Conditions (a) and (b) continue for 7 sec. or more
(2 trip detection logic):
(a) THW less than 70C (158F)
(b) Engine speed is greater than 2,000 rpm but less than 3,500
rpm
Open or short in speed sensor circuit

Speed sensor

Combination meter

ECM

Skid control ECU
05B5L±03

A81491
T3
Wire Harness Side
Intake Shutter Fully
Opened Switch Connector
A80456
E13
ECM ConnectorTHOP
05±638
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
6 READ VALUE OF HAND±HELD TESTER
(a) Connect the hand±held tester to the DLC3.
(b) Turn the ignition switch ON and push the hand±held tester main switch ON.
(c) Fully open the intake shutter valve by hand.
(d) Select the item ºDIAGNOSIS / OBD/MOBD / DATA LIST / ALL / ACCEL OPEN SWº and read its value
displayed on the hand±held tester.
Result:
Switch Condition DisplayedProceed to
OFFA
ONB
B CHECK DTC OUTPUT RECUR (DTC P0488 OUT-
PUT AGAIN)
HINT:
After clearing the DTC, start the engine and let it idle for 30 se-
conds and accelerate the vehicle speed to 60 km/h (37 mph)
with the accelerator pedal opened more than the half angle,
then confirm P0488 is not set again.
A
7 CHECK HARNESS AND CONNECTOR(FULLY OPENED SWITCH ± ECM)
(a) Disconnect T3 the intake shutter fully opened switch con-
nector.
(b) Disconnect the E13 ECM connector.
(c) Check for continuity between the wire harness side con-
nectors.
Standard (Check for open):
Symbols (Terminal No.)Specified condition
THOP (E13±11) ± Intake shutter (T3±1)Continuity
Standard (Check for short):
Symbols (Terminal No.)Specified condition
THOP (E13±11) or Intake shutter (T3±1) ± Body groundNo continuity
NG REPAIR OR REPLACE HARNESS OR
CONNECTOR
OK

± DIAGNOSTICSECD SYSTEM (1CD±FTV)
05±639
AVENSIS REPAIR MANUAL (RM1018E)
CHECK DTC OUTPUT RECUR (DTC P0488 OUTPUT AGAIN)
HINT:
After clearing the DTC, start the engine and let it idle for 30 seconds and accelerate the vehicle speed to
60 km/h (37 mph) with the accelerator pedal opened more than the half angle, then confirm P0488 is not
set again.

A81005
ECM
ALT 8
E13
IK1 G±Y
G2
GLOW
Relay1
2 3
G1
Glow Plug110
GLOW
Battery
EI R
4 B±L
B
FL
MAIN
BR B
ALT
12
12
33
BB
Engine Room
R/B No. 3
IJBR BR
B
B 3
333
1 25 15DH
DN 1 DH
18DB 9 DA ECU±IG I13
Ignition Switch 3
1
AM1AM1 IG1
G±R
ED1 1
WDriver
Side J/B
IG1
RelayA12 1
BB±L
A11 3
MY
A11 4
LRL 9
E12
Generator
IG S
2A11
1 A11 A11
R±W B
IK21
EE1 5GREL 14
E9
R
R
B
R±W R±W
W±B
G J10(LHD)
C J20(RHD)
J/C
G J10(LHD)
C J20(RHD)
ALT±SEFI
1 2
1 2 11
11AEngine
Room
R/B No. 1 IE3 7 (LHD)
(RHD)
IO1 7BATT 2
E10
E1 7
E12 B±Y
B±Y
B 05±624
± DIAGNOSTICSECD SYSTEM (1CD±FTV)
AVENSIS REPAIR MANUAL (RM1018E)
WIRING DIAGRAM

A66060ECM ConnectorE1
E13
#2
#1#3 #4E12
A09438
#1
#2
#3
#4 5 V/
Division
20 msec./Division
Signal Waveform
±
DIAGNOSTICS ECD SYSTEM(1CD±FTV)
05±611
AVENSIS REPAIR MANUAL (RM1018E)
7INSPECT ECM(INJECTOR VOLTAGE)
(a)Inspect using the oscilloscope.
(b)During idling, check the waveform between the specified
terminals of the E12 and E13 ECM connectors.
Standard:
Symbols (Terminal No.)Specified condition
#1 (E13±24) ± E1 (E12±7)
#2 (E13±23) ± E1 (E12±7)Correctwaveformisasshown#3 (E13±22) ± E1 (E12±7)Correct waveform is as shown
#4 (E13±21) ± E1 (E12±7)
NGREPLACE ECM(See page 10±65)
OK
8 REPLACE INJECTOR DRIVER
GO
CHECK DTC OUTPUT RECUR (DTC P0200 OUTPUT AGAIN)
HINT:
After clearing the DTC, start the engine and let it idle for 30 seconds, and \
then confirm P0200 is not set again.