Diagnosis System
- DIAGNOSIS SYSTEM
- Check DLC3.
The suspension control ECU uses the CAN system and ISO 9141-2 for communication. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 9141-2 format.
DLC3 TERMINALS SPECIFIED CONDITIONSSymbols (Terminal No.) Terminal Description Condition Specified Condition SIL (7) - SG (5) Bus "+" line During communication Pulse generation CG (4) - Body ground Chassis ground Always Below 1 Ω SG (5) - Body ground Signal ground Always Below 1 Ω BAT (16) - Body ground Battery positive Always 11 to 14 V HINT:
If the intelligent tester display shown UNABLE TO CONNECT TO VEHICLE when the cable of the intelligent tester is connected to the DLC3, the ignition switch is turned 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 the DLC3 on the original vehicle.
- If communication is still not possible when the tool is connected to another vehicle, the problem may be in the tester itself, so consult the service department listed in the tester's instruction manual.
- DTCs (Normal mode)
- DTCs are memorized in the suspension control ECU and read by using the SST check wire or the intelligent tester (DTC CHECK / CLEAR ).
SST 09843-18040
- Test mode (Input signal check)
- By switching from normal mode into test mode, you can inspect the height control switch, height control mode select switch, door courtesy light switch, and stop light switch (TEST MODE PROCEDURE ).
- Check the indicator light.
- Turn the ignition switch ON.
- Check that height control indicator light and height control OFF indicator light come on for 2 seconds.
If the indicator does not light, inspect the height control OFF indicator light circuit and height control indicator light circuit (Height Control Indicator Light Circuit and Height Control OFF Indicator Light Circuit ).
- Check DLC3.