Diagnosis System
- Inspect the battery voltage.
Battery voltage: 11 to 14
If voltage is below 11 V, recharge the battery before proceeding.
- Check DLC3.
The vehicle's suspension control ECU uses ISO 9141-2 for communication. The terminal arrangement of DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
Verify conditions listed in table below:
TERMINAL CONDITIONTerminal No. Connection/Voltage or Resistance Condition 7 Bus + Line / Pulse generation During transmission 4 Chassis Ground to Body Ground / 1 --> or less Always 16 Battery Positive to Body Ground / 9 to 14 V Always HINT:
If the hand-held tester display shows UNABLE TO CONNECT TO VEHICLE when the cable of the hand-held tester is connected to DLC3, the ignition switch is turned to ON and the tester is operated, there is a problem on the vehicle side or tester side.
- If communication is normal when the tester is connected to another vehicle, inspect DLC3 on the original vehicle.
- If communication is still not possible when the tool is connected to another vehicle, the problem is probably in the tester itself, so consult the Service Department listed in the tester's instruction manual.
- Check the indicator lamp.
- Turn the ignition switch ON.
- Check that the height control OFF indicator lamp and the height control indicator lamp come on for 2 sec.
If the indicator check result is not normal, proceed to troubleshooting for the height control indicator lamp circuit (See HEIGHT CONTROL INDICATOR LAMP CIRCUIT ) and the height control OFF indicator lamp circuit (See HEIGHT CONTROL OFF INDICATOR LAMP CIRCUIT ).