Diagnosis System

BRAKE CONTROL: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: DIAGNOSIS SYSTEM

DIAGNOSIS SYSTEM

1. DIAGNOSIS






(a) If the skid control ECU detects a malfunction, it will warn the driver by turning on the ABS, brake and brake control warning lights and slip indicator light. It also warns the driver with the indication on the multi-information display.
The table below indicates which lights will come on when there is a malfunction in a particular function.





- o: Light ON
- -: Light OFF
- 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, brake control warning lights, or indication on the multi-information display, or by connecting the Techstream.
- This system has a signal check function. The DTC can be read by connecting the Techstream and observing the blinking pattern of the ABS and brake control warning lights or by reading the multi-information display.

2. WARNING LIGHT AND INDICATOR LIGHT BULB CHECK






(a) Release the parking brake.
CAUTION: When releasing the parking brake, set chocks to hold the vehicle for safety.
- When the power switch is turned ON (IG), check that the ABS, brake and brake control warning lights and slip, VSC OFF indicator lights come on until the power switch is turned ON (READY).
- If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS, brake and brake control warning light circuits, and slip, VSC OFF indicator light circuits.
- If the indicator remains on, proceed to troubleshooting for the light circuit below.









3. CHECK DLC3
HINT: The vehicle uses ISO 15765-4 communication protocol. The terminal arrangement of the DLC3 complies with SAE J1962 and matches the ISO 15765-4 format.





NOTE: *: Before measuring the resistance, leave the vehicle as is for at least 1 minute and do not operate the power switch, any other switches or the doors.

If the result is not as specified, the DLC3 may have a malfunction. Repair or replace the harness and connector.
HINT: Connect the cable of the Techstream to the DLC3, turn the power switch ON (IG) and attempt to use the tester. If the display indicates that a communication error has occurred, there is a problem either with the vehicle or with the tester.
- If communication is normal when the tester is connected to another vehicle, inspect the DLC3 of the original vehicle.
- If communication is still not possible when the tester is connected to another vehicle, the problem may be in the tester itself. Consult the Service Department listed in the tester's instruction manual.