TROUBLESHOOTING USING GSC FAULT CODES - Continued
Inspect and service air cleaner per WP 0014 of TM9-6115-729-10.
If air cleaner required service, verify the fault code has cleared. If not continue to
the next step.
On EMCP, turn ENGINE CONTROL switch to OFF/RESET. Battery Disconnect
Switch is OFF; DEAD CRANK SWITCH is OFF.
Inspect connectors ENG-P2 on the engine harness (FO-2, sheet 1) and ENG-P1
on the ECM to EMCP Harness (FO-2, sheet 2).
Conduct an appropriate pull test on wires in the ENG-P2 and ENG-P1
connectors to ensure wires are tight and secure.
Check the wires on both harnesses for abrasion and pinch points (WP 0090).
Repair and/or replace the connectors and/or wiring (WP 0090), as necessary.
Disconnect engine harness connector ENG-P7 from inlet air temperature sensor
(WP 0090, Figure
1, and FO-2, sheet 1).
a. Use a jumper wire long enough to reach from engine harness connector
ENG-P7-1 to the engine ground stud.
b. Install jumper wire onto ENG-P7-1.
Set Battery Disconnect Switch to ON, Set DEAD CRANK SWITCH to NORMAL.
Turn ENGINE CONTROL switch to COOL DOWN/STOP.
On GSC keypad, press GSC ALARM CODES button.
a. Verify a diagnostic code 03 appears.
b. Short the jumper wire (ENG-P7-1) to the engine ground.
Verify a diagnostic code 04 appears. This verifies the ECM is working
Turn ENGINE CONTROL switch to OFF/RESET. Battery Disconnect Switch is
OFF; DEAD CRANK SWITCH is OFF.
Remove the jumper wire and connect all wires and connectors.
If a diagnostic code 03 and/or a diagnostic code 04 did not appear in STEP 9,
use a DVM to verify the wiring between ENG-P7-1 to ENG-P2-35 and between
ENG-P7-2 to ENG-P2-18, P6-2, and P18-2. Repair or replace the engine