AIR SUSPENSION SYSTEM PROBLEM SYMPTOMS TABLE
Tech Tips
-
Use the table below to help determine the cause of the problem symptom. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
-
Problem symptoms may occur if there is a malfunction in the electric power control system. Follow the HOW TO PROCEED WITH TROUBLESHOOTING procedures.
| Symptom | Suspected Area | See page |
|---|---|---|
| Driveability problem | Air leakage | |
| Pneumatic cylinder with front shock absorber | ||
| Pneumatic cylinder with rear shock absorber | ||
| Check DTC | ||
| Suspension control ECU | ||
| Height control function is normal, but vehicle height is uneven | Initialization | |
| Height control sensor link | ||
| Suspension control ECU | ||
| When engine switch is turned on (IG), "HEIGHT HIGH" indicator light does not illuminate for approximately 2 seconds | Electric power control system | |
| ECU power source circuit | ||
| Indicator circuit | ||
| When height control switch and drive mode select switch are operated, indicator light does not change | Electric power control system | |
| Indicator circuit | ||
| When height control switch and drive mode select switch are operated, indicator light only changes for one switch | Combination switch assembly | |
| Combination meter | ||
| DTC check cannot be performed | CAN communication line (for LHD) | |
| CAN communication line (for RHD) | ||
| TC and CG terminal circuit | ||
| Suspension control ECU | ||
| Input signal check (test mode) can not be performed | CAN communication line (for LHD) | |
| CAN communication line (for RHD) | ||
| TS and CG terminal circuit | ||
| Suspension control ECU |