1998 ISUZU TROOPER Service Repair Manual

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Page 1977 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±84
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0193 (Flash DTC 63)
Rail Pressure Sensor High Voltage
060RW135
Circuit Description
The rail pressure (RP) sensor respo

Page 1978 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±85 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0193 ± RP Sensor High Voltage
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD

Page 1979 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±86
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1193 (Flash DTC 64)
RPCV Circuit Open/Short
060RW135
Circuit Description
The rail pressure control valve (RPCV) is bui

Page 1980 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±87 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P1193 ± RPCV Circuit Open/Short
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OB

Page 1981 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±88
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1194 (Flash DTC 61)
Rail Pressure System Low Voltage
060RW134
Circuit Description
The rail pressure (RP) sensor respon

Page 1982 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±89 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P1194 ± RP System Low Voltage
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
S

6E±89 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P1194 ± RP System Low Voltage
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
21. Engine is running.
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 ªDTCº info for DTC P1194.
Does the Tech 2 indicate DTC P1194 failed?
ÐGo to Step 3
Refer to
Diagnostic
Aids
3Connect a test light between B+ and the RP sensor
signal circuit at the RP sensor harness connector.
Is the RP value near the specified value.
5 VGo to Step 4Go to Step 6
41. Ignition ªOFF.º
2. Disconnect the ECM and check the 5 volt reference
ªJ2º 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 5
5Check 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 6
61. Ignition ªOFF.º
2. Disconnect the ECM, and check the RP signal
circuit for an open, short to ground, or short to the
sensor ground circuit.
3. If the RP sensor signal circuit is open or shorted to
ground, repair it as necessary.
Was the RP signal circuit open or shorted to ground?
ÐVerify repairGo to Step 7
7Check the RP sensor signal circuit for a poor
connection at the ECM and the RP sensor; replace the
terminal if necessary.
Did the terminal require replacement?
ÐVerify repairGo to Step 8
8Replace the ECM (Refer to the Data Programming in
Case of ECM change).
Is the action complete?
ÐVerify repairGo to Step 9
9Check the 2 way valve.
Was the 2 way valve darmage?
Ð
Replace the 2
way valve
Go to Step 10
10Replace the RPCV.
Is the action complete?
ÐVerify repairGo to Step 11
11Replace the RP sensor.
Is the action complete?
ÐVerify repairÐ

Page 1983 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±90
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1195 (Flash DTC 61)
Rail Pressure System High Voltage
060RW134
Circuit Description
The rail pressure (RP) sensor respo

Page 1984 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±91 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P1195 ± RP System High Voltage
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD

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