Diagnosis System

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: DIAGNOSIS SYSTEM

1. DIAGNOSIS

(a) If the skid control ECU detects a malfunction, it will warn the driver by turning on the ABS warning light, brake warning light / red (malfunction) and brake warning light / yellow (minor malfunction) and slip and brake hold standby indicator light. It also warns the driver with the indication on the multi-information display.

The DTCs are simultaneously stored in the memory. The DTCs can be read by connecting SST between terminals 13 (TC) and 4 (CG) of the DLC3 and observing the blinking pattern of the ABS warning light, slip indicator light, brake hold standby indicator light and brake warning light / yellow (minor malfunction), or indication on the multi-information display, or by connecting the Techstream.

This system has a Test Mode sensor signal check function. The Test Mode DTC can be read by connecting the Techstream and observing the blinking pattern of the the ABS warning light and brake warning light / yellow (minor malfunction) or by reading the multi-information display.

2. WARNING LIGHT AND INDICATOR LIGHT CHECK

(a) Release the parking brake.

CAUTION:
When releasing the parking brake, set chocks to hold the vehicle for safety.

(b) When the engine switch is on (IG), check that the ABS warning light, brake warning light / red (malfunction) and brake warning light / yellow (minor malfunction), and slip, VSC OFF, brake hold standby, brake hold operated indicator lights illuminate and then turn off after the engine starts.

If the result is not as specified, proceed to troubleshooting for the light circuit below.