CAN Communication Circuit Inspection (TCM ↔A.A.F.)

Ignition "OFF".
Disconnect A.A.F. connector and TCM connector
Measure the resistance between CAN-HIGH terminal of A.A.F. harness connector and CAN-HIGH terminal of TCM harness connector.
Measure the resistance between CAN-LOW terminal of A.A.F. harness connector and CAN-LOW terminal of TCM harness connector.
Specification: below 1Ω
Is the measured resistance within specification?
YES
- Check TCM, A.A.F. connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
NO
- Check for open/short in harness.
- Substitute with a known-good TCM and check for proper operation. If the problem is corrected, replace TCM and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.
- Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.