Sentra L4-1.8L (QG18DE) SULEV (2003)
Check Sheet Results (Example)
Note:
If "NG" displayed on "CAN COMM" for the diagnosed control unit, replace the control unit.
INSPECTION
Proceed to trouble diagnosis according to the check sheet results (example).
Case 1:
Replace ECM.
See: Engine Control Module
Case 2:
Replace TCM.
See: Transmission Control Systems/Relays and Modules - Transmission and Drivetrain/Relays and Modules - A/T/Control Module
Case 3:
Check CAN communication Circuit.
Refer to "CAN Communication Circuit Check".
See: Non-Trouble Code Procedures/CAN Communication Circuit Check
Electrical Component Inspection
ECM/TCM INTERNAL CIRCUIT INSPECTION
Remove ECM and TCM from vehicle.
Check resistance between ECM terminals 33 and 34.