1998 ISUZU TROOPER Service Repair Manual

charging cruise control navigation update warning lights height lumbar support

Page 1961 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±68
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. Verifies that the fault is present.
3. If DTC P0118 can be re

6E±68
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Test Description
Number(s) below refer to the step number(s) on the
Diagnostic Chart.
2. Verifies that the fault is present.
3. If DTC P0118 can be repeated only by duplicating
the Failure Records conditions, refer to the
ªTemperature vs. Resistance Valueº table. The
table may be used to test the ECT sensor at various
temperatures to evaluate the possibility of a
ªshiftedº sensor that may be shorted above or below
a certain temperature. If this is the case, replace
the ECT sensor. If the ECT sensor appears to be
OK, the fault is intermittent; refer to
Diagnostic Aids.
Engine Coolant Temperature Sensor
CFOhms
Temperature vs. Resistance Values
(approximate)
80176332
25772796
15594450
DTC P0118 ± ECT Sensor High Voltage
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
21. Ignition ªON,º engine ªOFF.º
2. Observe the ªEng Cool Tempº display on the Tech 2.
Is the ªEng Cool Tempº below the specified value?
±39C
(±38F)
Go to Step 4Go to Step 3
31. Ignition ªON,º engine ªOFF.º
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor the ª DTCº info for DTC
P0118.
Does the Tech 2 indicate DTC P0118 failed?
Ð
Refer to Test
Description
Refer to
Diagnostic
Aids
41. Disconnect the ECT sensor electrical connector.
2. Jumper the ECT signal circuit and the sensor
ground circuit together at the ECT sensor harness
connector.
3. Observe the ªEng Cool Tempº display on the Tech 2.
Is the ªEng Cool Tempº at the specified value?
140C
(284F)
Go to Step 6Go to Step 5
51. Jumper the ECT signal circuit at the ECT sensor
harness connector to chassis ground.
2. Observe the ªEng Cool Tempº display on the Tech 2.
Is the ªEng Cool Tempº at the specified value?
140C
(284F)
Go to Step 7Go to Step 8
6Check for poor connections at the ECT sensor and
replace terminals if necessary.
Did any terminals require replacement?
ÐVerify repairGo to Step 10
71. Ignition ªOFF.º
2. Disconnect the ECM, and check the ECT sensor
ground circuit for an open.
3. If the ECT sensor ground circuit is open, repair it as
necessary.
Was the ECT sensor ground circuit open?
ÐVerify repairGo to Step 9

Page 1962 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±69 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0118 ± ECT Sensor High Voltage
StepNo Ye s Value(s) Action
81. Ignition ªOFF.º
2. Disconnect the ECM, and check the ECT signal
circu

Page 1963 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±70
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0121 (Flash DTC 33)
AP Sensor Rationality
060RW134
Circuit Description
The accel position (AP) sensor circuit provides

Page 1964 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±71 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0121 ±AP Sensor Rationality
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
Sy

Page 1965 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±72
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0122 (Flash DTC 21)
AP Sensor Low Voltage
060RW134
Circuit Description
The accelerator position (AP) sensor circuit pr

Page 1966 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±73 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0122 ±AP Sensor Low Voltage
StepNo Ye s Value(s) Action
31. Ignition ªON,º engine ªOFF.º
2. With the throttle closed, observe the

6E±73 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0122 ±AP Sensor Low Voltage
StepNo Ye s Value(s) Action
31. Ignition ªON,º engine ªOFF.º
2. With the throttle closed, observe the ªAP Sensorº
display on the Tech 2.
Is the ªAP Sensorº below the specified value?
0.1 VGo to Step 5Go to Step 4
41. Ignition ªON,º engine ªOFF.º
2. Review and record Tech 2 Failure Records data.
3. Operate the vehicle within Failure Records
conditions as noted.
4. Using a Tech 2, monitor the ªDTCº info for DTC
P0122.
Does the Tech 2 indicate DTC P0122 failed?
ÐGo to Step 5
Refer to
Diagnostic
Aids
51. Ignition ªOFF.º
2. Disconnect the AP sensor electrical connector.
3. Jumper the 5 volt reference ªJ2º circuit and the AP
signal together at the AP sensor harness connector.
4. Ignition ªON.º
Observe the ªAP Sensorº display on the Tech 2.
Is the ªAP Sensorº at the specified value?
5 VGo to Step 11Go to Step 6
61. Disconnect jumper.
2. Connect a test light between B+ and the AP sensor
signal circuit at the AP sensor harness connector.
Observe the ªAP Sensorº display on the Tech 2.
Is the ªAP Sensorº at the specified value?
5 VGo to Step 7Go to Step 9
71. Ignition ªOFF.º
2. Disconnect the ECM and check the 5 volt reference
ªAº circuit for an open or short to ground.
3. If the 5 volt reference ªJ2º circuit is open or shorted
to ground, repair it as necessary.
Was the 5 volt reference ªJ2º circuit open or shorted to
ground?
ÐVerify repairGo to Step 8
8Check the 5 volt reference ªJ2º circuit for a poor
connection at the ECM and replace the terminal if
necessary.
Did the terminal require replacement?
ÐVerify repairGo to Step 13
91. Ignition ªOFF.º
2. Disconnect the ECM, and check the AP signal
circuit for an open, short to ground, or short to the
sensor ground circuit.
3. If the AP sensor signal circuit is open or shorted to
ground, repair it as necessary.
Was the AP signal circuit open or shorted to ground?
ÐVerify repairGo to Step 10
10Check the AP sensor signal circuit for a poor
connection at the ECM and replace the terminal if
necessary.
Did the terminal require replacement?
ÐVerify repairGo to Step 13
11Check the AP sensor signal circuit for a poor
connection at the AP sensor and replace the terminal if
necessary.
Did the terminal require replacement?
ÐVerify repairGo to Step 12

Page 1967 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±74
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0122 ±AP Sensor Low Voltage
StepNo Ye s Value(s) Action
12Replace the AP sensor.
Is the action complete?
ÐVerify repairÐ
13Replace t

Page 1968 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±75 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0123 (Flash DTC 21)
AP Sensor High Voltage
060RW134
Circuit Description
The accelerator position (AP) sensor circuit p

Load next 8 pages

Page: < prev 1-10 ... 1929-1936 1937-1944 1945-1952 1953-1960 1961-1968 1969-1976 1977-1984 1985-1992 1993-2000 ... 3576 next >

transmission fluid towing capacity winter tyres keyless entry fuel consumption flat tire