Table 196
Troubleshooting Test Steps
Values Results
1. Inspect Electrical Connectors and Wiring
A. Turn the keyswitch to the OFF position.
B. Thoroughly inspect the connectors for the motorized
valves. Refer to Troubleshooting, “Electrical Connectors - In-
spect” for details.
C. Perform a 45 N (10 lb) pull test on each of the wires in the
ECM connector that are associated with the motorized valves.
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 motorized valves 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 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. 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 -5 diagnostic code is active or recently logged for
one or more of the motorized valves.
Proceed to Test Step 4.
Result: A -6 diagnostic code is active or recently logged for
one or more of the motorized valves.
Proceed to Test Step 6.
Result: A -7, E1263 (2), or E1121 (2) diagnostic code is ac-
tive or recently logged for one or more of the motorized
valves.
Proceed to Test Step 3.
Result: No diagnostic codes are active or logged.
Repair: For intermittent faults, refer to Troubleshooting,
“Electrical Connectors - Inspect”.
If no intermittent faults are found, return the unit to service.
(continued)
358 UENR4469-36
Circuit Tests
Copyright of Perkins Engine Company Limited. NOT FOR REPRINTING OR RESALE
To Next Page
Loading...
