Table 191
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 cylinder head. Re-
fer to Troubleshooting, “Electrical Connectors - Inspect” for
details.
C. Perform a 45 N (10 lb) pull test on each of the wires in the
ECM connector that are associated with injector solenoids.
D. Check the screw for the ECM connector for the correct tor-
que of 6 N·m (53 lb in).
E. Check the harness and wiring for abrasion and for pinch
points from the injectors to the ECM.
Loose connection
or damaged wire
Result: There is a fault in a connector or the wiring.
Repair: Repair any faulty connectors or replace the wiring
harness. Ensure that all of the seals are properly in place
and ensure that the connectors are correctly coupled.
Use the electronic service tool to clear all logged diagnostic
codes and verify that the repair eliminates the fault.
Result: All connectors, pins, and sockets are correctly
coupled and/or inserted. The harness is free of corrosion,
abrasion, and pinch points.
Proceed to Test Step 2.
2. Use the ““Injector Solenoid Test””
A. Start the engine.
B. Allow the engine to warm up to the normal operating
temperature.
C. Stop the engine.
D. Turn the keyswitch to the ON position.
E. Access the “Injector Solenoid Test” by accessing the follow-
ing display screens in order:
· “Diagnostics”
· “Diagnostic Tests”
· “Injector Solenoid Test”
F. Activate the test.
Note: Do not confuse the “Injector Solenoid Test” with the
“Cylinder Cutout Test” . The “Cylinder Cutout Test” is used to
shut off fuel to a specific cylinder while the engine is running.
The “Injector Solenoid Test” is used to actuate the injector sol-
enoids while the engine is not running.
“OK” , “OPEN” , or
“SHORT”
Result: All cylinders indicate “OK” - There is not an elec-
tronic fault with the injectors at this time.
Use the electronic service tool to clear all logged diagnostic
codes. Return the engine to service.
Result: “OPEN”
Note the cylinders that indicate “OPEN” .
Proceed to Test Step 3.
Result: “SHORT”
Note the cylinders that indicate “SHORT” .
Proceed to Test Step 4.
(continued)
UENR4469-36 349
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
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