Diagnostic Procedure
- STEP 1. Scan tool CAN bus diagnostics
Using scan tool MB991958, diagnose the CAN bus lines.
Q: Is the check result normal?
YES : Go to Step 2.
NO : Repair the CAN bus lines. (Refer to TROUBLESHOOTING ). After repairing the CAN bus line, go to Step 2.
- STEP 2. PADDLE SHIFT SWITCH CHECK
Refer to PADDLE SHIFT SWITCH CHECK .
Q: Is the check result normal?
YES : Go to Step 3.
NO : Replace the paddle shift assembly. (Refer to PADDLE SHIFT ASSEMBLY ).
- STEP 3. Measure the resistance at C-207 paddle shift switch connector.
Disconnect the connector, and measure the resistance between terminal No.2 and ground at the wiring harness side.
OK: Continuity exists (2 Ω or less)
Q: Is the check result normal?
YES : Go to Step 6.
NO : Go to Step 4.
- STEP 4. Paddle shift switch connector check: C-207
Check for the contact with terminals.
Q: Is the check result normal?
YES : Go to Step 5.
NO : Repair the defective connector.
- STEP 5. Check the wiring harness between C-207 paddle shift switch connector terminal No. 2 and the body ground.
Check the ground line for open circuit.
Q: Is the check result normal?
YES : Go to Step 6.
NO : Repair the wiring harness.
- STEP 6. Inspection of the shift lever assembly connector, intermediate connector, and paddle shift switch connector: C-27, C-130, C-207
Check for the contact with terminals.
Q: Is the check result normal?
YES : Go to Step 7.
NO : Repair the defective connector.
- STEP 7. Check the wiring harness between C-207 paddle shift switch connector terminal No. 1 and C-27 shift lever assembly connector terminal No. 11, and between C-207 paddle shift switch connector terminal No. 3 and C-27 shift lever assembly connector terminal No. 10.
Check the output line for short or open circuit.
Q: Is the check result normal?
YES : Go to Step 8.
NO : Repair the wiring harness.
- STEP 8. Trouble symptom recheck after replacing the shift lever assembly
- Replace the shift lever assembly. (Refer to TRANSMISSION CONTROL ).
- Verify that the condition described by the customer exists.
Q: Does a malfunction take place again?
YES : Replace the TC-SST assembly. (Refer to TRANSAXLE ASSEMBLY ).
NO : Intermittent malfunction. (Refer to HOW TO COPE WITH INTERMITTENT MALFUNCTION ).