Inspection Procedure 1

Inspection Procedure 1: TCM cannot communication with scan tool.













SYMPTOMS

TCM cannot be turned ON.

PROBABLE CAUSES

- Damaged wiring harness and connectors

- Malfunction of TCM

DIAGNOSIS

STEP 1. Check the following connector:

- A-15X CVT control relay connector

- C-41 TCM connector

Check each terminal for imperfect contact.

Q. Is the check result normal?

YES Go to Step 2.
NO Repair the defective connector.
STEP 2. Check for open circuit in the wiring harness between the relay box connector and the TCM connector.

- Between A-15X CVT control relay connector (terminal No.3) and C-41 TCM connector (terminal No.12)

- Between A-15X CVT control relay connector (terminal No.3) and C-41 TCM connector (terminal No.25)

Q. Is the check result normal?

YES Go to Step 3.
NO Repair the wiring harness.
STEP 3. Check for open circuit in the wiring harness between the TCM connector and the ground.

- Between C-41 TCM (terminal No.13) and ground

- Between C-41 TCM (terminal No.26) and ground

Q. Is the check result normal?

YES Go to Step 4.
NO Repair the wiring harness.
STEP 4. Retest the system.

Recheck the trouble symptom.

Q. Does the malfunction take place again?

YES Replace TCM.
NO Intermittent malfunction