Symptom Troubleshooting Index
When the vehicle has one of these symptoms, check for a diagnostic trouble code (DTC) with the HDS. If there is no DTC, do the diagnostic procedure for the symptom, in the sequence listed, until you find the cause.
SYMPTOM TROUBLESHOOTING
| Symptom |
Diagnostic procedure |
| HDS does not communicate with the ABS modulator-control unit or the vehicle |
Troubleshoot the DLC circuit (see
DLC CIRCUIT TROUBLESHOOTING
). |
| ABS indicator does not come on |
- Do the gauge control module troubleshooting (see
SELF-DIAGNOSTIC FUNCTION
).
- Substitute a known-good ABS modulator-control unit, then recheck. If it is OK, replace the original ABS modulator-control unit (see
ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
|
| ABS indicator does not go off, and no DTCs are stored |
- Symptom troubleshooting (see
SYMPTOM TROUBLESHOOTING ).
- Do the gauge control module troubleshooting (see
SELF-DIAGNOSTIC FUNCTION
).
|
| Brake system indicator does not come on |
- Do the gauge control module troubleshooting (see
SELF-DIAGNOSTIC FUNCTION
).
- Substitute a known-good ABS modulator-control unit, then recheck. If it is OK, replace the original ABS modulator-control unit (see
ABS MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
|
| Brake system indicator does not go off, and no DTCs are stored |
- Symptom troubleshooting (see
BRAKE SYSTEM INDICATOR DOES NOT GO OFF, AND NO DTCS ARE STORED ).
- Do the gauge control module troubleshooting (see
SELF-DIAGNOSTIC FUNCTION
).
|
| ABS indicator and brake system indicator do not go off at the same time |
- Symptom troubleshooting (see
ABS INDICATOR AND BRAKE SYSTEM INDICATOR DO NOT GO OFF AT THE SAME TIME ).
- Do the gauge control module troubleshooting (see
SELF-DIAGNOSTIC FUNCTION
).
|