ABS Symptom Troubleshooting Index - Indicator Circuit

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 Diagnostic procedure 
HDS does not communicate with the ABS modulator-control unit or the vehicle Troubleshoot the DLC circuit: R18A1 engine model, K20Z2 engine model. 
ABS indicator does not come on 1.
2. 		Do the gauge control module troubleshooting.
Substitute a known-good ABS modulator-control unit, then recheck. If it is OK, replace the original ABS modulator-control unit: Except K20Z2 engine model, K20Z2 engine model. 
ABS indicator does not go off, and no DTCs are stored 1.
2. 		Do the gauge control module troubleshooting.
Symptom Troubleshooting. 
Brake system indicator does not come on 1.
2. 		Do the gauge control module troubleshooting.
Substitute a known-good ABS modulator-control unit, then recheck. If it is OK, replace the original ABS modulator-control unit: Except K20Z2 engine model, K20Z2 engine model. 
Brake system indicator does not go off, and no DTCs are stored 1.
2. 		Do the gauge control module troubleshooting.
Symptom Troubleshooting. 
ABS indicator and brake system indicator do not go off at the same time 1.
2. 		Do the gauge control module troubleshooting.
Symptom Troubleshooting.