Description of On-Board Diagnosics

Initial Fault Diagnosis





Test run all motors in both directions before commencing fault diagnosis. If one of the motor fuses blow when the motor is driven then it is very likely that the motor connection is short circuited to ground. Rectify the fault and change the fuse. Then continue fault diagnosis.

Fault Diagnosis With ISAT Scan Tool

Connect the ISAT to the data link connector. Turn the ignition key to the ON position and contact the electronic control module.

Important: The seat no longer operates when contact is established with the ISAT.

If the ISAT fails to contact the electronic control module, see "Fault diagnosis, diagnostic communication".

First read and note possible diagnostic trouble codes. Check the electronic control module is getting the correct input signals from the memory switch panel and from the manual control, by reading, "READ SWITCHES" on the ISAT scan tool. Read one switch at a time by operating the manual control and depressing the memory switch. The ISAT should then show "OPEN" or "CLOSED".

Relevant diagnostic trouble code

When carrying out fault diagnosis on the electrically operated seat both permanent and intermittent faults may be detected. The first figure of the diagnostic trouble code shows what kind of fault is being dealt with, 4 and 5 state a permanent fault, 2 and 3 an intermittent fault.