Diagnosis System

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: DIAGNOSIS SYSTEM

DIAGNOSIS SYSTEM

1. DIAGNOSIS
If the skid control ECU detects a malfunction, the ABS, VSC and brake warning lights and the slip, downhill assist control and AUTO LSD indicator lights come on in accordance with the trouble area to warn the driver.
The table below indicates which lights come on when there are malfunctions in particular functions.









o: Light ON
●: Light ON (Blinking)
-: Light OFF
HINT:
- *1: w/ Downhill assist control
- *2: w/ Hill-start assist control
- *3: for 2WD w/ AUTO LSD
- *4: w/ 16-inch disc
- The DTCs can be read by connecting SST (09843-18040) between the TC and CG terminals of the DLC3 and observing the blinking pattern of the ABS and VSC warning lights, or by using Techstream Reading and Clearing Diagnostic Trouble Codes.
- This system has a sensor signal check function Test Mode Procedure.

2. CHECK WARNING LIGHT AND INDICATOR LIGHT
(a) Release the parking brake lever.
NOTE: Before releasing the parking brake lever, set chocks to hold the vehicle for safety.
HINT: When the parking brake is applied or the brake fluid level is low, the brake warning light comes on.

(b) When the ignition switch is turned ON, check that the ABS, VSC and brake warning lights and the slip, downhill assist control and AUTO LSD indicator lights come on and go off in about 3 seconds.





HINT: If the warning lights do not illuminate, confirm whether the bulbs have burned out, and also check for CAN communication system DTCs, since the skid control ECU and combination meter are connected by the CAN communication line.
If the warning light remains on, perform relevant troubleshooting procedures. The relevant troubleshooting procedures are in the sections listed in the table below.