Table 78
Troubleshooting Test Steps
Values
Results
1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position. A strong electrical
shock hazard is present if the keyswitch is not turned OFF.
B. Thoroughly inspect the connectors at the injectors. Refer to
Troubleshooting, “Electrical Connectors - Inspect” for details.
C. Inspect the terminals on the P1/J1 ECM connector and all
other connectors associated with the injector solenoid circuits.
D. Perform a 30 N (6.7 lb) pull test on each of the wires in the
ECM connector that are associated with injector solenoids.
E. Check the harness and wiring for abrasion and for pinch
points from the injectors to the ECM.
Damaged wire
or connector
Result:
A damaged wire or damaged connector was found. A
fuse is blown.
Repair the damaged wire or the damaged connector. Replace
any blown fuses
Use the electronic service tool to clear all logged diagnostic co-
des. Verify that the repair eliminates the fault.
Result:
All connectors, pins, and sockets are correctly con-
nected and/or inserted and the harness is free of corrosion, of
abrasion or of pinch points.
Proceed to Test Step 2.
2. Check for Active Diagnostic Codes
A. Connect the electronic service tool to the diagnostic
connector.
B. Start the engine.
C. Allow the engine to warm up to the normal operating
temperature.
D. Stop the engine.
E. Turn the keyswitch to the ON position.
Note:
Wait at least 30 seconds for activation of the diagnostic
codes.
F. Use the electronic service tool in order to verify if any of the
diagnostic codes that are listed in Table 77 are active or re-
cently logged.
Diagnostic
codes
Result:
An XXXX-5 diagnostic code is active or recently
logged.
Note the cylinders that the codes are applicable to. Proceed to
Test Step 3.
Result:
An XXXX-6 diagnostic code is active or recently
logged.
Note the cylinders that the codes are applicable to. Proceed to
Test Step 5.
Result:
A 2797-7 diagnostic code is active.
Proceed to Test Step 7.
3. Create a Short at the Injector Connector
A. Turn the keyswitch to the OFF position. A strong electrical
shock hazard is present if the keyswitch is not turned OFF.
B. Disconnect the connector from the suspect injector.
C. Fabricate a jumper wire 100 mm (4 inch) long.
D. Install the jumper wire between terminal 1 and terminal 2
on the harness connector for the suspect injector.
E. Start the engine. Wait at least 30 seconds for activation of
the diagnostic codes.
F. Use the electronic service tool to check for active diagnostic
codes.
G. Turn the keyswitch to the OFF position.
H. Remove the jumper wire.
Diagnostic
codes
Result:
An XXX-6 diagnostic code was active with the jumper
installed.
Thoroughly inspect the electrical connector on the suspect in-
jector and the harness connector for the suspect injector. En-
sure that the connectors are free from corrosion. Reconnect the
connector for the suspect injector.
Start the engine.
If the fault is still present, replace the faulty injector. Refer to
Disassembly and Assembly, “Electronic Unit Injector - Remove”
and Disassembly and Assembly, “Electronic Unit Injector -
Install”.
Use the electronic service tool to clear all logged diagnostic co-
des and verify that the repair eliminates the fault.
Result:
An XXX-5 diagnostic code is still present with the jump-
er installed.
Proceed to Test Step 4.
(continued)
152
UENR0612
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