1998 ISUZU TROOPER Service Repair Manual

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Page 2049 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±156
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P0510 ± Idle SW Malfunction, Open Circuit
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step

Page 2050 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±157 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1510 (Flash DTC 75)
Idle SW Malfunction Short Circuit
060RW134
Circuit Description
The idle switch signal is used by

Page 2051 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±158
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P1510 ± Idle SW Malfunction, Short Circuit
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step

Page 2052 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±159 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0562 (Flash DTC 35)
System Voltage Too Low
Circuit Description
The engine control module (ECM) monitors the system
vo

6E±159 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P0562 (Flash DTC 35)
System Voltage Too Low
Circuit Description
The engine control module (ECM) monitors the system
voltage on the ignition feed terminals to the ECM. A
system voltage DTC will set whenever the voltage is
above a calibrated value.
Action Taken When the DTC Sets
The ECM will not illuminate the malfunction indicator
lamp (MIL).
The ECM will store as Failure Records only conditions
which were present when the DTC was set. This
information will not be stored as Freeze Frame data.
Conditions for Clearing the MIL/DTC
DTC P0563 can be cleared by using the Tech 2 ªClear
Infoº function or by disconnecting the ECM battery
feed.
Diagnostic Aids
If the DTC sets when an accessory is operated, check for
a poor connection or defective accessory.
DTC P0562 ± System Voltage Too Low
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
System
Check
2Using a DVM, measure the battery voltage at the
battery.
Is the battery voltage greater than the specified value?
11.5 VGo to Step 3
Charge
battery, then
go to
Step 3
31. Install a Tech 2.
2. Select ªIgnition Voltsº on the Tech 2.
3. Start the engine and raise the engine speed to the
specified value.
4. Load the electrical system by turning on the
headlights, high blower, etc.
Is the ignition voltage approximately equal to the
specified value?
2000 RPM
12.8-14.1 V
Go to Step 4
Go to
Starting/
Charging
41. Ignition ªOFF.º
2. Disconnect the ECM connector at the ECM.
3. Using a DVM, measure the battery voltage at the
ECM connector.
Is it approximately equal to battery voltage?
Ð
Check for
excessive
current draw
with ignition
ªOFF,º engine
ªOFF.º
Go to Step 5
51. Check for faulty connections at the ECM harness
terminals.
2. Repair as necessary.
Was a repair necessary?
ÐVerify repairGo to Step 6
6Check for an open battery feed circuit to the ECM.
Is the action complete?
ÐVerify repairGo to Step 7
7Replace the ECM (Refer to the Data Programming in
Case of ECM change).
Is the action complete?
ÐVerify repairÐ

Page 2053 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±160
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1562 (Flash DTC 35)
System Voltage Too Low at Cranking
Circuit Description
The engine control module (ECM) monitors t

Page 2054 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±161 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1587 (Flash DTC 25)
Brake SW Malfunction
060RW130
Circuit Description
Brake Stop Lamp SW Circuit receives through Sto

Page 2055 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±162
4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
DTC P1587 ± Brake SW Malfunction
StepActionValue(s)Ye sNo
1Was the ªOn-Board Diagnostic (OBD) System Checkº
performed?
ÐGo to Step 2
Go to OBD
S

Page 2056 of 3573

ISUZU TROOPER 1998 Service Repair Manual 6E±163 4JX1±TC ENGINE DRIVEABILITY AND EMISSIONS
Diagnostic Trouble Code (DTC) P1588 (Flash DTC 25)
Brake SW Malfunction
060RW130
Circuit Description
Brake Stop Lamp SW Circuit receives through Sto

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