ELECTRICAL SYSTEM TESTS, INSPECTIONS, AND ADJUSTMENTS - CONTINUED
SET SPEED CIRCUIT TEST - CONTINUED
Repeat this procedure for each of these ECM pin connections:
P1:11 Set Speed Control Continue Resume
P1:20 Set Speed Control Set
P1:28 Set Speed Control ON or OFF
Expected Results. Status screen should display OPEN condition with switch in OFF position. Status screen should
display CLOSED condition with switch in ON position.
If results are OK, ECM is working correctly.
If results are NOT OK, ECM is not working properly. Replace suspect ECM (WP 0053 00). Verify repair
STARTING AID OUTPUT CIRCUIT TEST
N OT E
· Use this test to check starting aid voltage and operation.
· Starting aid is used to improve the engine's ability to start when cold.
· 3056E engine uses ether start system.
· ECM controls operation of starting aid through starting aid relay and P1:43.
Inspect electrical connectors and wiring. Refer to Electrical Connectors Inspection (WP 0022 00).
Disconnect and thoroughly inspect J1/P1 ECM connector and J20/P20 MIC (WP 0053 00 and WP 0170 00).
Inspect terminal connections on starting aid relay.
Perform 10 lb (45 N) pull test on each wire in ECM connector associated with starting aid.
Check ECM connector (socket-head screw) for proper torque of 55 lb-ft (6 Nm).
Check harness and wiring for abrasions and pinch points from sensors back to ECM.
Reconnect all connectors.