Troubleshooting

Table 100
Troubleshooting Test Steps
Values Results
1. Inspect Electrical Connectors and Wiring
A. Check the fuses.
B. Thoroughly inspect the P2/J2 and P1/J1 ECM connectors
and thoroughly inspect the connectors for the solenoid
valves. Refer to Troubleshooting, “Electrical Connectors - In-
spect” for details.
C. Inspect the terminals on the P1/J1 ECM connector and all
other connectors associated with the glow plug circuit.
D. Perform a 30 N (6.7 lb) pull test on each of the wires that
are associated with the solenoid valves.
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 Diagnostic Codes
A. Turn the keyswitch to the OFF position.
B. Connect the electronic service tool to the diagnostic
connector.
C. Turn the keyswitch to the ON position.
D. Monitor the electronic service tool for active diagnostic co-
des and/or logged diagnostic codes.
Diagnostic
codes
Result: A 1076-5 diagnostic code is active or recently logged.
Proceed to Test Step 3.
Result: A 1188-5 diagnostic code is active or recently logged.
Proceed to Test Step 4.
Result: A 1076-6 or 1188-6 diagnostic code is active or re-
cently logged.
Proceed to Test Step 8.
Result: A 1076-2 diagnostic code is active or recently logged
An intermittent fault exists in the circuit for the fuel metering
valve.
For intermittent faults, refer to Troubleshooting, “Electrical
Connectors - Inspect”.
3. Check the Power Supply to the ECM
A. Check that pin P1:1 is receiving the correct voltage. Refer
to Troubleshooting, “Electrical Power Supply - Test”.
Note: The power supply for the fuel pump metering valve is
supplied through P1:1.
Power supply Result: The power supply to P1:1 is faulty.
Perform any necessary repairs. Refer to Troubleshooting,
“Electrical Power Supply - Test”.
Result: The power supply to P1:1 is OK.
Proceed to Test Step 4.
(continued)
UENR0612-07 215
Circuit Tests
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