NO.6 SOME OR ALL SHIFTS MISSING [LA4AX-EL (CD4E)]

id0503a2808000

6

Some or all shifts missing

POSSIBLE CAUSE

• ATF
• Powertrain control system malfunction
• Internal and external shift linkage malfunction
• Speed input malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
ATF
• Is the level correct?
Yes
Adjust fluid to the proper level
No
Go to the next step
2
Powertrain control system
• Are there any malfunctions with the following?
- Electrical input/output
- Vehicle wiring harness
- PCM
- Shift solenoids
- Transaxle range (TR) switch
- Throttle position (TP) sensor
- Vehicle speedometer sensor (VSS)
- O/D OFF switch
Yes
Run OBD test
Perform DTC troubleshooting
No
Go to the next step
3
Internal and external shift linkages
• Do any of the following malfunctions exist?
- Damage
- Misadjustment
- Misassembly
(See SELECTOR LEVER REMOVAL/INSTALLATION.)
Yes
Service if necessary
No
Go to the next step
4
Speed input
• Is the vehicle speedometer sensor drive gear damaged?
Yes
Service if necessary
No
For further diagnosis, refer to the appropriate shift routine (s):

5
• 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.