display ISUZU TROOPER 1995 Owners Manual

AUTOMATIC TRANSMISSION (4L30-E) 7 A-87
DIAGNOSTIC TROUBLE CODE (DTC) 22
THROTTLE POSITION SENSOR SHORT TO GROUND
Check Engine Control Module (ECM) DTC.
IF: DTC on Throttle Position Sensor (TPS) exists:
Check diagnosis
of ECM and repair. • Install scan tool GOTHROUGH TECH1 CONNECTION. • Ignition switch ON, engine not running. • Selector lever position uP".
• Select FO: DATA LIST: "TPS SIGNAL". IF: TECH1 DISPLAY less than 0.2 volts:
• Connect voltmeter between connector C-91 terminal C5 and TPS ground
terminal C6.
IF: If you have less than 0.2 volts:
• Check for a short to ground between connector C-91 terminal C5 and
connector E-5 terminal 3. This faulty connection can be at the intermediate connector H-5 terminal 10.This faulty connection can be at the ECM connector C-2 terminal D6.
• Repair If not OK: Ignition switch OFF. Disconnect sensor connector E-5. • Connect ohmmeter between sensor terminals 3 wiper and 1 low side.
• If resistance between TPS terminal 3 and 1 does not change when
the throttle valve angle is changed: Replace TPS.
DTC 22 is intermittent. GOTO INTERMITTENT
CONDITIONS.

AUTOMATIC TRANSMISSION (4L30-E) 7 A-89
DIAGNOSTIC TROUBLE CODE (DTC) 23
THROTTLE POSITION SENSOR CONNECTOR OPEN
Check Engine Control Module (ECM)
DTC.
IF: DTC on Throttle Position Sensor (TPS) exists:
I
Check diagnosis of ECM and repair. • Install scan tool GOTHROUGH TECH1 CONNECTION.
• Ignition switch ON, engine not running.
• Selector lever position "P". • Select FO: DATA LIST: "TPS SIGNAL". IF: TECH 1 DISPLAY approx. 2.5 volts whatever the throttle valve position:
IF: TPS connector E-5 on I the engine is open: DTC 23 is intermittent. GOTO INTERMITTENT
CONDITIONS.
~
NO
Repair. j
• Ignition switch OFF. Disconnect connector C-91. Connect ohmmeter between connector C-91 terminals C5 and C6. If open circuit: • Check for an open between connector C-91 terminal C5 to connector E-5 terminal 3 with a simultaneous open of the terminal C6 to the connector E-5 terminal1. This faulty connection can be at the intermediate connector H-5 terminal 10 and 11.
• Repair. If not OK: Ignition switch OFF. Disconnect sensor.
• Connect ohmmeter between sensor terminals 3 wiper and 1 low side. If resistance between TPS terminal 3 and 1 does not change when the throttle valve angle is changed: Replace TPS.

AUTOMATIC TRANSMISSION (4L30-E) 7A-91
DIAGNOSTIC TROUBLE CODE (DTC) 25
SUPPLY VOLTAGE TOO LOW
• Ignition switch ON. Engine OFF.
• Connect voltmeter between B+ and B-terminals of battery. IF: Display greater than 9 volts:
•
Engine running.
• Connect voltmeter between B+ and B-terminals of battery.
IF: display between 13 and 16 volts?
• Ignition
switch OFF. • Disconnect Transmission Control Module (TCM)
connector C-90 and C-91. • Ignition switch ON. Engine OFF.
• Connect voltmeter between connector C-90 terminal A7 and connector C-91 terminal C1. IF: Display greater than 9 volts:
Check for faulty connection and if OK.
GOTO INTERMITTENT CONDITIONS.
Check fuse and wire to A7, AS and C1 for
open circuit.

AUTOMATIC TRANSMISSION (4l30·E) 7 A-93
DIAGNOSTIC TROUBLE CODE (DTC) 26
SUPPLY VOLTAGE TOO HIGH
• Ignition switch ON. Engine OFF.
• Connect voltmeter between B+ and B-terminals of battery. IF: Display greater than 16 volts:
•
Engine running. • Connect voltmeter between B+ and B-terminals of
battery. IF: Display between 3 to 16 volts:
• Ignition
switch OFF. • Disconnect Transmission Control
Module (TCM) connector C-90 and
C-91. • Ignition switch ON. Engine ON.
•
Connect voltmeter between
connector C-90 terminals A7 and
connector C-91 terminal C1. IF: Display higher than 16 volts:
Check regulator. The problem is
intermittent.
GOTO
INTERMITIENT CONDITIONS.

AUTOMATIC TRANSMISSION (4L30-E) 7 A-95
DIAGNOSTIC TROUBLE CODE (DTC) 31
SOLENOID 1-2/3-4 SHORT TO GROUND OR OPEN
• Ignition switch OFF. • Disconnect Transmission Control Module (TCM) connector C-90 and C-91.
•
Connect ohmmeter between connector C-91 terminal C12 and connector C-90 terminal A2. IF: Display between 17.5 and 18.5 ohms?
• Connect ohmmeter between connector C-90 terminal A2 and connector C-91 terminal C1 (TCM ground).
IF: Short circuit:
• Check for faulty connector or wiring between terminal A2
and ground.
• Repair.
The
problem is intermittent. GOTO INTERMITTENT CONDmONS.
Check for an open circuit between connector C-90 terminal A2 and connector C-91 terminal C12.
IF: Wiring problem?
I Repair.
• Disconnect 1-2/3-4 solenoid connector. • IF: Ohmmeter displays between 17.5 and 18.5
ohms on the 1-2/3-4
solenoid terminals:
The problems is
intermittent. GOTO INTERMITTENT
CONDITIONS.

AUTOMATIC TRANSMISSION (4L30-E) 7 A-97
DIAGNOSTIC TROUBLE CODE (DTC) 32
SOLENOID 2-3 SHORT TO GROUND OR OPEN
• Ignition switch OFF. • Disconnect Transmission Control Module
(TCM) connector C-90 and C-91.
• Connect
ohmmeter between connector C-91 terminal C12 and connector C-90 terminal A3. IF: Display between 17.5 and 18.5 ohms?
• Connect ohmmeter between connector C-90 terminal A3 and connector C-91 terminal C1 (TCM ground).
IF: Short circuit:
• Check for faulty connector or wiring between terminal A3
and ground.
Repair.
The
problem is intermittent. GOTO INTERMITTENT
CONDITIONS.
Check for an open circuit between connector C-90 terminal A3 and connector C-91 terminal C1.
IF: Wiring problem?
•
Disconnect 2-3 solenoid connector. IF: Ohmmeter displays between 17.5 and 18.5 ohms on the 2-3 solenoid terminals:
The problems is
intermittent. GOTO INTERMITTENT
CONDITIONS.

7A-100 AUTOMATIC TRANSMISSION (4L30-E)
DIAGNOSTIC TROUBLE CODE (OTC) 33
TCC HIGH SHORT TO PLUS OR OPEN
(CONTINUED)
CONTINUED FR~
PREVIOUS~E A
I
OPEN?
• Ignition switch OFF.
• Disconnect TCM connector C-90 and C-91.
• Connect ohmmeter between connector C-91 terminal C7 and C1 (TCM ground).
IF: Display is between 17.5 and 18.5 ohms.
• Disconnect transmission adapter case connector M-6. • Connect ohmmeter between terminal 4(A) of female half of
connector and transmission which is used as ground. IF: Display between 17.5 and 18.5 ohms:
• Wire between connector C-91 terminal C7 and
adapter case connector is open or shorted to another wire.
• Repair.
• Wire between adapter case connector and solenoid is open. • Or wire between transmission (ground) and
solenoid is open. • Repair.
TCC: Torque Converter Clutch TCM: Transmission Control Module •
Disconnect solenoid connector. • Connect ohmmeter between
the two solenoid
terminals.
IF: Display is between 17.5 and 18.5 ohms.
•

AUTOMATIC TRANSMISSION (4L30-E) 7 A-103
DIAGNOSTIC TROUBLE CODE (DTC) 34
BAND APPLY SOLENOID SHORT TO GROUND OR OPEN
• Ignition switch off. • Disconnect Transmission Control Module (TCM) connector C-90 and C-91
• Connect ohmmeter between connector C-91 terminal C12 and connector C-90 terminal A9. IF: Display is approx. 10 ohms:
• Connect ohmmeter between connector C-90 terminal A9 and connector C-91 terminal C1 (TCM ground)
IF: Short circuit:
• Check for faulty connector or wiring
between terminal A9
and ground.
• Repair.
The
problem is intermittent.
GOTO INTERMITTENT
CONDITIONS.
• Check for an open circuit between
connector C-90 terminal A9 and
connector
C-91 terminal C12. IF: Wiring problem?
•
Disconnect band apply solenoid connector. IF: Ohmmeter displays approx. 10
ohms on the band apply solenoid terminals:
The
problem is intermittent.
GOTO INTERMmENT CONDITIONS.

AUTOMATIC TRANSMISSION (4l30-E) 7A-105
DIAGNOSTIC
TROUBLE CODE (DTC) 35
FORCE MOTOR OPEN OR SHORT TO PLUS OR GROUND
• Ignition switch off.
• Disconnect Transmission Control Module (TCM) connector C-90 and C-91
• Connect ohmmeter between connector C-91 terminals C15 and C16. IF: Display is between 3.7 and 4.7 ohms:
• Connect ohmmeter between connector C-91 terminals C15 and C1 {TCM ground) then between
terminal C15 and connecter C-90 terminal A7 (TCM ignition) then between terminals C16 and C1 (TCM ground) then between terminals C16 and A7 (TCM ignition).
IF: Display indicates a short circuit:
The
problem is
intermittent. GOTO INTERMITIENT
CONDITIONS.
• Disconnect automatic transmission adapter case
connector M-6.
• Connect ohmmeter between terminals 2(8) and 1(E)
of female half of the connector (solenoid side). IF: Display between 3.7 and 4.7 ohms:
Repair wires
for open between terminals C15 or C16 and adapter
case connector M-6.
• Disconnect solenoid connector. • Connect ohmmeter between solenoid
terminals.
IF: Display between 3.7 and 4.7 ohms:
Repair wires
for open
between adapter case
connector and
solenoid connector.
Replace force motor solenoid.

AUTOMATIC TRANSMISSION (4L30-E) 7A-107
DIAGNOSTIC TROUBLE CODE (DTC) 36
SHIFT HIGH SHORT TO GROUND OR OPEN
• Ignition switch off .
• Disconnect Transmission Control Module (TCM)
connectors C-90 and C-91.
• Connect ohmmeter between connector C-91 terminal C12 and connector C-90 terminal A2 and between
C12 and A3 and between C12 and A9. IF: Display is approx. 10 ohms for the band apply and 18 ohms for the other solenoids:
I
$ $
• Connect ohmmeter between connector C-91 terminal • Check for an open circuit between connector
C12 and C1 (TCM ground). C-91 terminal C12 and the other terminals A2,
IF: Short circuit: A3
and A9.
I IF: Wiring problem?
I
$ 8
$ $ • Check for faulty connector or wiring between terminal C12 I Repair. I The problem is
and ground. intermittent.
• Repair
. GOTO INTERMmENT
CONDITIONS.
I The problem is intermittent. GOTO INTERMITTENT CONDITIONS.