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
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
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 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.