NO.7 SHIFT CONCERN: TIMING-EARLY/LATE [LA4AX-EL (CD4E)]

id0503a2808100

7

Shift concern: timing-early/late

POSSIBLE CAUSE

• Powertrain control system malfunction
• Tire size malfunction
• Speed input malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
Powertrain control system
• Are there any malfunctions with the following?
- Electrical input/output
- Vehicle wiring harness
- PCM
- Throttle position (TP) sensor
- Vehicle speedometer sensor (VSS)
- Transaxle fluid temperature (TFT) sensor
(See Line Pressure Test.)
Yes
Run OBD test
Perform DTC troubleshooting
No
Go to the next step
2
Possible components
• Do any of the following malfunctions exist?
- Tire size change
- Vehicle speedometer sensor drive gear is damaged
Yes
Service if necessary
No
The problem is not in the automatic transaxle
Go to engine symptom troubleshooting
3
• Verify the test results.
- If normal, return to the diagnostic index to service any additional symptoms.
- If the malfunction remains, inspect the related Service Bulletins and/or On-line Repair Information and perform repair or diagnosis.
• If the vehicle is repaired, troubleshooting is completed.
• If the vehicle is not repaired or additional diagnostic information is not available, replace the PCM.