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
Yes
Run OBD test
Perform DTC troubleshooting
(See AUTOMATIC TRANSAXLE ON-BOARD DIAGNOSTIC FUNCTION[LA4AX-EL (CD4E)].)
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
(See ENGINE SYMPTOM TROUBLESHOOTING[AJ (3.0L Duratec)].)
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 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.