2007 ISUZU KB P190 Workshop Repair Manual

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Page 2337 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–167
DIAGNOSTIC TROUBLE CODE (DTC) P0201 INJECTOR 1 CONTROL CIRCUIT
DIAGNOSTIC TROUBLE CODE (DTC) P0202 INJECTOR 2 CONTROL CIRCUIT
DIAGNOSTIC TROUBLE CODE (DTC)

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ISUZU KB P190 2007 Workshop Repair Manual 6E–168 ENGINE DRIVEABILITY AND EMISSIONS
Trouble Code is set. This Diagnostic Trouble Code is
also set if an injector driver is shorted to voltage.
Diagnostic Aids
An injector driver circuit that i

6E–168 ENGINE DRIVEABILITY AND EMISSIONS
Trouble Code is set. This Diagnostic Trouble Code is
also set if an injector driver is shorted to voltage.
Diagnostic Aids
An injector driver circuit that is open or shorted to
voltage will cause a Diagnostic Trouble Code P0201 to
set. It will also cause a misfire due to an inoperative injector. A misfire Diagnostic Trouble Code will also be
set indicating which cylinder is inoperative.
Long term and short term fuel trims that are excessively
high or low are a good indication that an injector is
faulty.
Use Fuel Injector Coil Test Procedure to check for faulty
injectors.
Diagnostic Trouble Code (DTC) P0201 Injector 1 Control Circuit
Diagnostic Trouble Code (DTC) P0202 Injector 2 Control Circuit
Diagnostic Trouble Code (DTC) P0203 Injector 3 Control Circuit
Diagnostic Trouble Code (DTC) P0204 Injector 4 Control Circuit
Step Action Value(s) Yes No
1 Was the “On-Board Diagnostic (OBD) System Check” performed?
—Go to Step 2Go to
On Board
Diagnostic
(OBD) System Check
2 1. Connect the Tech 2. 2. Review and record the failure information.
3. Select “F0: Read DTC Infor By Priority” in “F0: Diagnostic Trouble Code”.
Is the DTC P0201, P0202, P0203 or P0204 stored as
“Present Failure”? — Go to Step 3Refer to
Diagnostic Aids and Go to Step
3
3 1. Using the Tech2, ignition “On” and engine “Off”. 2. Select “Clear DTC Information” with the Tech2 andclear the DTC information.
3. Operate the vehicle and monitor the “F5: Failed This Ignition” in “F2: DTC Information”.
Was the DTC P0201, P0202, P0203 or P0204 stored
in this ignition cycle? — Go to Step 4Refer to
Diagnostic Aids and Go to Step
4
4 Check for poor/faulty connection at the injector or ECM connector. If a poor/faulty connection is found,
repair as necessary.
Was the problem found?
— Verify repair Go to Step 5
5 Visually check the injector for the affected cylinder. Was the problem found? — Go to Step 11Go to Step 6
22
89
11
E-60(J1)
E-6/E-7/E-8/E-9

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ISUZU KB P190 2007

Page 2339 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–169
6 Using the DVM and check the injector coil for theaffected cylinder.
1. Ignition “Off”, engine “Off”.
2. Disconnect injector connector for the a

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ISUZU KB P190 2007 Workshop Repair Manual 6E–170 ENGINE DRIVEABILITY AND EMISSIONS
7 Using the DVM and check the injector power supplycircuit for the affected cylinder.
1. Ignition “On”, engine “Off”.
2. Disconnect the injector co

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ISUZU KB P190 2007 Workshop Repair Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–171
9 Using the DVM and check the injector signal circuit forthe affected cylinder.
Breaker box is available:
1. Ignition “Off”, engine “Off”.
2. Ins

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ISUZU KB P190 2007 Workshop Repair Manual 6E–172 ENGINE DRIVEABILITY AND EMISSIONS
9Breaker box is not available:
1. Ignition “Off”, engine “Off”.
2. Disconnect the injector connector for the affected cylinder and ECM connector.

Page 2343 of 6020

ISUZU KB P190 2007 Workshop Repair Manual ENGINE DRIVEABILITY AND EMISSIONS 6E–173
10 Using the DVM and check the injector signal circuit.1. Ignition “On”, engine “Off”.
2. Disconnect the injector connector for the affected cylind

Page 2344 of 6020

ISUZU KB P190 2007 Workshop Repair Manual 6E–174 ENGINE DRIVEABILITY AND EMISSIONS
DIAGNOSTIC TROUBLE CODE (DTC) P0325 KNOCK SENSOR (KS) MODULE CIRCUIT
Condition for setting the DTC and action taken when the DTC sets
Circuit Description
Th

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