sensor ISUZU TROOPER 1995 Workshop Manual

AUTOMATIC TRANSMISSION (4L30-E) 7 A~7
FO: DATA LIST QUICK CHECK
TECH 1
DISPLAY
CONDITONS CORRECT VALUE
BATIERY VOLTAGE
Ignition ON 9 V < voltage < 16 V
(V)
FORCE MOTOR CUR. Engine at idle speed approx. 0.9 A
CALCULAT. PRESS. Parking
brake on
approx. 4.0 bar Selector lever position "D"
SOLENOID 1-2/3-4
Vehicle traveling at a speed of: approx. ACTIVE
50 km/h (32 mph) with selector lever in
position
"2" or approx. 70 km/h (44 mph)
with selector lever in position "3"
SOLENOID 2-3
Vehicle traveling at a speed of: approx. ACTIVE
10 km/h_(6 mph) with selector lever in
position
"L" or approx. 30 km/h (18 mph)
with selector lever in position "2"
BAND APPLY SOL. Engine at idle speed
approx. 99% DC
Selector lever position "L"
TCC SOLENOID Vehicle traveling at a speed of approx. ON
80 km/h (50 mph)
Selector lever position "D"
TCC SLIP RPM Constant engine speed 0 ± 10 RPM
Selector lever position "D"
TCCon
BRAKE SWITCH
Ignition ON ACTIVE
Brake pedal pressed
AT
INPUT SPEED Engine speed :;:; 200 rpm Engine speed: (RPM)
Output speed> 1024 rpm
Selector lever position "D", "3", "2", "L"
AT OUTPUT SPEED Output speed:;:; 0 km/h (0 mph) Output speed:
Engine speed >
3000 rpm (MPH/KPH)
Selector lever position "D", "3", "2", "L" ·
BAROMETER
Engine at idle speed 0.9-1.0 bar
SENSOR approx. 0.02 V
SELECTOR POS. Ignition ON Dependent on
Shift through all selector lever positions selector lever position
P, R, N, D, 3, 2, L
C!C OlD LOCKOUT When 0/D OFF signal detected while ACTIVE
cruise control system is in use
ACTUAL GEAR Vehicle traveling at a speed of approx. - 4 -
100 km/h (62 mph)
Selector lever position
"D"
NOTE:
(*1) .... FOR DIAGNOSIS OF A DTC SEE CHART 2: DIAGNOSTIC TROUBLE CODES (DTC)
tPAGE..ll)
FOR
DIAGNOSIS
SEE*1
DTC25
or 26
DTC35
DTC 31
or 41
DTC32
or 42
DTC34
or 44
DTC33
or 43
DTC33
or 43
DTC55
or 56
DTC 13
or 62
DTC 11
or13
-
DTC53
or 54
-
DTC 61

AUTOMATIC TRANSMISSION (4L30-E) 7 A-71
CHART 2: DIAGNOSTIC TROUBLE CODE (OTC)
I v
' FOR
DTC MALFUNCTION DIAGNOSIS
SEE PAGE
11 OUTPUT
SPEED FAILURE 7A -74
13 ENGINE SPEED FAILURE 7A -78
15 TRANSMISSION OIL TEMPERATURE SHORT TO PLUS OR OPEN 7A-80
16 TRANSMISSION OIL TEMPERATURE SHORT TO GROUND 7A-82
21 THROTTLE POSITION SENSOR SHORT TO PLUS OR OPEN 7A-84
22 THROTTLE POSITION SENSOR SHORT TO GROUND 7A-86
23 THROTTLE
POSITION SENSOR CONNECTOR OPEN 7A-88
25
SUPPLY VOLTAGE TOO LOW 7A-90
26 SUPPLY VOLTAGE TOO HIGH 7A-92
31 SOLENOID 1-2/3-4 SHORT TO GROUND OR OPEN 7A-94
32
SOLENOID 2-3 SHORT TO GROUND OR OPEN 7A-96
33 TCC
HIGH SHORT TO PLUS OR OPEN 7A-98
34
BAND APPLY SOLENOID SHORT TO GROUND OR OPEN 7A-102
35 FORCE MOTOR OPEN OR SHORT TO PLUS OR GROUND 7A-104
36 SHIFT HIGH SHORT TO GROUND OR OPEN 7A-106
37 TORQUE MANAGEMENT SERIAL LINE FAULTY 7A-108
41 SOLENOID 1-2/3-4 SHORT TO PLUS 7A-110
42 SOLENOID 2-3 SHORT TO PLUS 7A-112
43 TCC HIGH SHORT TO GROUND 7A-114
44
BAND APPLY SOLENOID SHORT TO PLUS 7A-116
46 SHIFT HIGH SHORT TO PLUS 7A-118
51 ENGINE COOLANT SWITCH SHORT TO GROUND, PLUS OR OPEN 7A-120
52 KICK DOWN ALWAYS ON OR SHORT TO GROUND 7A-122
53 MODE SWITCH IN P OR N OR R BAD POSITION 7A-124
54
MODE SWITCH ILLEGAL POSITION 7A-126
55 BRAKE
SWITCH SHORT TO GROUND OR OPEN 7A-128
56 BRAKE
SWITCH
SHORT TO PLUS 7A-130
61 GEAR ERROR 7A-132
62 DOWNSHIFT PROTECTION 7A-134
63
EPROM CSUM FAILURE 7A-137
82 SHIFT OR BAND APPLY SOLENOIDS FAULTY DURING DRIVING 7A-138

7 A-74 AUTOMATIC TRANSMISSION (4l30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 11
OUTPUT SPEED FAILURE
This DTC flashes the CHECK TRANS indicator and
sets the
BACKUP MODE.
Circuit Description:
The transmission output speed sensor provides
information on vehicle speed to the Transmission
Control Module (TCM). The speed sensor circuit
consists
of a magnetic induction type sensor. The
sensor is
mounted above a target wheel pressed on
the
output shaft in the transmission extension. As
the
output shaft turns, the target wheel teeth induce
a variable voltage in the magnetic pickup. This
alternating current
(AC) signal is provided to the
TCM. The voltage increases with the speed of the
wheel
but this is not used to define the speed of the
vehicle. As the vehicle
moves faster, the signal
alternates faster between positive and negative
voltages. The
Output speed information is
proportional to the frequency of the signal.
TRANSMISSION SPEED SENSOR SHIELDS
Diagnostic Aids:
• This diagnostic is not an electrical test done by
the TCM but a test between different information
("logic test").
• Detection conditions:
CD Output Speed < OR = 0 KPH (0 MPH).
® Engine Speed > 3000 RPM.
@ No Malfunction: Engine Speed DTC 13. Mode
Switch DTC54.
@ Selector lever not in Park, Reverse, or Neutral.
@ The conditions need to be present for at least
5 seconds.
• Action after the detection time:
CD CHECK TRANS Indicator is turned ON.
® TCM in BACKUP MODE
•
Recovery conditions :To recover do an IGNITION
CYCLE.
- - -,.,.. C-90 "" - -~ ~ ""\' - -:-' M-15 r - - - - - - -TRANSMISSION I I WHT I , I , H<~o I , I , t , I SPEED SENSOR I +I > I I I I 6 I I I I 2 I (EXTENSION) I A12 I I I HOUSING
I II 111
11111111 ©I
', VEHICLE ', II I
I I I I I I I I I I !I ' ,~, 1
:
SPEED . I I I I I I I I I II "-.
I INPUT I I I I I I I I I I
I I I
ORN I I I I I I I I
I
-1 ~812 BLK l-- -~b - -~ ,> - - - - - - -I
I ll B11 s
I GROUND I C-91 BLK/ORN H-9_11
I I I C1 BLK/BLU : I
J __ -_I D1
TRANSMISSION
CONTROL MODULE
(TCM)
•

AUTOMATIC TRANSMISSION (4L30·E) 7 A-75
DIAGNOSTIC TROUBLE CODE (DTC) 11
OUTPUT SPEED FAILURE
W CAUTION: If wire to connector C-90 terminal 812 is short to voltage, Transmission Control Module
(TCM) will be damaged.
IF the DTC 53 is set:
I I
~
GOTH ROUGH DTC 53 first J I IF you have a SCAN TOOL: TECH17 I and do a test drive. I
cf
$
• Raise drive wheels. • Ignition switch OFF.
• Connect the TECH1 GOTH ROUGH TECH1 • Disconnect TCM connector C-90 & C-91.
CONNECTION. • Connect ohmmeter between connector C-90 terminal
• Push "FO": DATALIST: DISPLAY. Read •AT OUTPUT A12 and terminal 812 . SPEED". IF: display is approx. 3K ohms: IF: Output Speed different from 0 RPM when the wheels are turning:
diJ
§J
$
T
Problem is intermittent. GOTO INTERMITTENT
CONDITIONS. • Connect ohmmeter between connector C-90 terminal A12 and ground connector C-91 terminal C1.
IF: display indicates an open circuit:
$ ~
Check for faulty TCM connection. IF OK GOTO TCM MEM-CAL
REPLACEMENT.
HINT: the wire between TCM terminal 812 and sensor connector M-15 terminal 1 can be shorted to ground or open without creating a problem because the TCM 812 pin is connected to the TCM ground internally and the signal is
detected only on the A 12 input.
• Check wire for a short to ground between terminal A 12 and sensor
connector M-15 terminal 2. IF: display indicates a short circuit:
I
A CONTINUED
ONNEX~
NO
• Disconnect transmission speed
sensor connector M-15.
• Connect ohmmeter between terminals 1 and 2 of the speed
sensor.
IF: display approx. 3K ohms:
$ ~
• Wires from Connector C-90 to sensor
connector are open or shorted together.
• Repair .
I Replace transmission
speed sensor.

7A-76 AUTOMATIC TRANSMISSION (4L30-E)
CONTINUED FROM
PREVIOUS~ A
• Connect voltmeter between connector C-90 terminal
A 12 and ground connector C-91 terminal C1.
• Ignition switch ON. IF: display indicates approximately 0 volt:
Check
for faulty TCM
connectors.
IF OK GOTO TCM MEM·
CAL REPLACEMENT.
Check wire for a short
to voltage between
terminal A12 and
speed sensor
connector M-15.

1 A-80 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 15
TRANSMISSION OIL TEMPERATURE SHORT TO PLUS OR OPEN
This DTC does NOT flash the CHECK TRANS
indicator and does NOT set the BACKUP MODE.
Circuit Description:
• The transmission oil temperature sensor is a
thermistor within the internal wiring harness of
the transmission in the adaptor case oil pan. The
Transmission Control Module (TCM) applies 5
volts to the sensor connector M-6 terminal 3(C).
The
other side of the sensor is connected to
ground through the TCM terminal C14.
When the transmission oil is cold, the sensor
resistance is high and the TCM will sense high
signal voltage.
• As the transmission oil temperature warms to
normal transmission operating temperature of
80°C (176°F), the sensor resistance becomes less
and
the voltage decreases at about 3.5 volts.
Note,
for more accuracy the measurement is
done differently for low temperature (less than
45°C) and high temperature (more than 50°C).
•
When DTC15 is set, the transmission will use a
warm value for operation, but the scan tool will
display the actual oil temperature.
• Table shows thermistor resistance at different
temperatures.
Table:
oc OF Resistance (kQ)
-40 -40 672
0 32 65
20 68 25
80 176
2.5
120 248 0.78
150 304 0.37
Diagnostic Aids:
• This Diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD Voltage between terminals B3 and C14 > 4.74
volts.
@ The condition needs to be present for at least
20 seconds. Note: during the detection time
the TCM reads the high voltage that defines a
-40°C temperature.
• Action after the detection time: Default Trans­
mission Oil Temperature is set to 100°C. But
winter mode still available.
• Recovery conditions: To recover when voltage <
or= to 4.74 volts after detection time.
f - ---C-90 GRN/YEL H-10 ITRANSMISSIONI >---'----<•((,--------3-(C--,) I M-6 to,,IL ~ 3 ~
ltEMf!EAATURE I I --1---- ---, AUTOMATIC
SENSOR I I I TRANSMISSION
llNPUT
I
I I
I TRANSMISSION L.... Oil I
I I I ~ TEMPERATURE
I I I / SENSOR I
I I I I
r I I __ _. _______ I
I I C-91 H-10 5(0) 1' M-6 GRY/BLU I ,. I >>---_:__--< < I IC14 11
I II
II I GROUND
I BLK/ORN H-11
1 1?c1 ~q I '-. I ~>--B_L__cKI_BL_U--<~ 5
----J 01
1
TRANSMISSION
CONTROL
MODULE ITCM)

AUTOMATIC TRANSMISSION (4L30-E) 7 A-81
DIAGNOSTIC TROUBLE CODE (DTC) 15
TRANSMISSION OIL TEMPERATURE SHORT TO PLUS OR OPEN
Install scan tool.
GOTHROUGH
TECH1 CONNECTION.
• Ignition switch ON. Engine not running. • Selector lever position "P". • Select "FO: DATA LIST: Trans. Oil Temp". IF: TECH1 DISPLAY more than 4.74 Volts:
•
Connect voltmeter between connector C-90 terminal 83 and connector C-91 ground terminal C1.
IF: If you have more than approximately 4.74 Volts:
• Check
for a short to plus or open between connector C-90 terminal 83 and connector C-91 terminal C14. This faulty connection can be at the connector M-6 terminal 3 (C) or 5 (D). This faulty connection can be
at the intermediate connector
H-1 0 terminals 3 or 11. • Repair If not OK: Disconnect sensor.
• Connect ohmmeter between sensor terminals 3(C) and 5(D).
Refer
to the table of the resistance function of the
temperature.
If resistance not correct, replace the transmission oil temperature sensor.
DTC 15 is intermittent. GOTO INTERMITTENT CONDITIONS.
GOTO TCM MEM-CAL REPLACEMENT.

7 A-82 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 16
TRANSMISSION OIL TEMPERATURE SHORT TO GROUND
This DTC does NOT flash the CHECK TRANS
indicator and does NOT set the BACKUP MODE.
Circuit Description:
• The transmission oil temperature sensor is a
thermistor within the internal wiring harness of
the transmission in the adaptor case oil pan. The
Transmission Control Module (TCM) applies 5
volts to the sensor connector M-6 terminal 3(C).
The
other side of the sensor is connected to
ground through the TCM terminal C14. When the
transmission oil is cold, the sensor resistance is
high and the TCM will sense high signal voltage.
•
As the transmission oil temperature warms to
normal transmission operating temperature of
aooc (176°F), the sensor resistance becomes less
and the voltage decreases at about 3.5 volts.
Note, for more accuracy the measurement is
done differently for low temperature (less than
45°C) and high temperature (more than 50°C).
•
When DTC16 is set, the transmission will use a
warm value for operation, but the scan tool will
display the actual oil temperature.
• Table shows thermistor resistance at different
temperatures.
Diagnostic Aids:
• This Diagnostic is an electrical test done by the
TCM.
• Detection conditions:
G) Voltage between terminals B3 and C14 < 0.4
volts.
@ The condition needs to be present for at least
20 seconds. Note: during the detection time
the TCM reads the low voltage that defines a
170°C temperature.
• Action after the detection time: Default Trans­
mission Oil Temperature is set to 100°C. But
winter mode still available.
•
Recovery conditions: To recover when voltage >
or = to 0.4 volts after detection time.
I - - - -e-go GRN/YEL H-10
ITRANSMISSIONI >----'-----<:·oE---------3-(C-)-,'1 M-6
OIL I 83 I--1-- --- -.., AUTOMATIC !TEMPERATURE I I TRANSMISSION SENSOR NPUT I TRANSMISSION I .I OIL I I y TEMPERATURE I / SENSOR I
I
I I
I __ _.-------
C>--9_1_G_RY_I_BL_U_- ----, j>-)>-:~:~~8-L_K!~B~L-U_-_-_-_-_-:_-_-_-_-_-_-~)·p
TRANSMISSION ~·· ... -l
CONTROL MODULE !TCM)

AUTOMATIC TRANSMISSION (4L30-E) 7 A-83
DIAGNOSTIC TROUBLE CODE (DTC) 16
TRANSMISSION OIL TEMPERATURE SHORT TO GROUND
Install scan tool.
GOTH ROUGH
TECH1 CONNECTION.
• Ignition switch ON. Engine not running.
• Selector lever position "P". • Select "FO: DATA LIST: Trans. Oil Temp".
IF: TECH1 DISPLAY less than 0.4 Volts:
• Connect
voltmeter between connector C-90 terminal 83 and connector C-91 ground terminal C1. IF: If you have less than approximately 0.4 Volts:
• Check
for a short to ground between
connector C-90 terminal 83 and
connector M-6 terminal 3 {C). This faulty connection can be at the
intermediate connector
H-10 terminal 3.
• Repair If not OK: Disconnect sensor. • Connect ohmmeter between sensor terminals 3{C) and 5{D).
Refer
to the table of the resistance
function of the temperature {DTC 15).
If resistance not correct, replace sensor.
DTC 16 is intermittent. GOTO INTERMITTENT CONDITIONS.
GOTO TCM MEM-CAL REPLACEMENT.

7 A-84 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (DTC) 21
THROTTLE POSITION SENSOR SHORT TO PLUS OR OPEN
This DTC flashes the CHECK TRANS indicator and
sets
the BACKUP MODE.
Circuit Description:
• The Throttle Position Sensor (TPS) provides a
voltage signal that changes relative to the throttle
plate position. Signal voltage between connector
C-91 terminals C5 and C6 will vary from about 0.4
at idle to about 4.6 volts at wide open throttle.
• The Engine Control Module (ECM) also receives
this signal. This TPS is a variable resistance with
one side (connector E-5 terminal 2) connected
only to the ECM connector to have the 5 volts
supply voltage. The other side (connector E-5
terminal 1) is connected to the Transmission
Control Module (TCM) (floating ground) and the
ECM (ground). The "middle" (the wiper) (con­
nector E-5 terminal 3) is connected to the TCM
and
the ECM.
• The ECM monitors output voltage from the TPS
and determines fuel delivery based on throttle
valve angle (driver demand).
r---...,
I
I
I
I
I
I
TPS INPUT
I GROUND I L ___ _j
C-91
T C5
I
I
C6
BLU/ORN
BLU/RED
BLU/RED
BLK/WHT
• This TPS is an electrical component and must not
be soaked in any liquid cleaner or solvent, as
damage may result.
Diagnostic Aids:
• This Diagnostic is an electrical test done by the
TCM.
• Detection conditions:
CD Voltage between connector C-91 terminals C5
and C6 > 4.9 volts. This detection occurs
when: The wiper is short to voltage (engine
can
stall) or open.
@ The condition needs to be present for at least
0.5
seconds. Note: during the detection time
the TCM reads "100% (wide open throttle)".
• Action after the detection time: BACKUP MODE.
•
Recovery conditions: To recover when voltage <
or= to 4.9 volts and do an IGNITION CYCLE.
H-5 BLU/ORN
9
BLU/
H-5
RED E-5
-10 3 TO COOLANT TEMPERATURE
1 SENSOR H-5 BLK/WHT
BLK/WHT
11
2 E-5
E-5
THROTTLE POSITION
SENSOR
(TPS)
TRANSMISSION CONTROL MODULE
(TCM)
A1 S.-1_ 06 .,&_2 _ _!>2 C-2
lsvoLT-rps -aRouNDl ENGINE
I REFERENCE INPUT I CONTROL MODULE
I (ECM)
L--------J