Diagnosis System

BRAKE CONTROL: VEHICLE STABILITY CONTROL SYSTEM: DIAGNOSIS SYSTEM

DIAGNOSIS SYSTEM

1. CHECK DLC3






(a) The ECU uses ISO 15765-4 for communication. The terminal arrangement of the DLC3 complies with ISO 15031-3 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 ignition 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 ignition switch to ON 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 is probably in the tester itself. Consult the Service Department listed in the tester's instruction manual.

2. DIAGNOSIS
(a) If the skid control ECU detects a malfunction, the ABS warning light, VSC TRAC warning light, BRAKE warning light, VSC OFF indicator light and/or SLIP indicator light come on in accordance with the trouble area to warn the driver.
The table below indicates which lights come on when there is a malfunction in a particular function.









o: Light ON, -: Light OFF
HINT:
- The DTCs are simultaneously stored in the memory. The DTCs can be read by connecting the Techstream.
- This system has a sensor signal check function Test Mode Procedure. The DTCs can be read by connecting SST (09843-18040) between terminals TS and CG of the DLC3 and observing the blinking of the ABS warning light and VSC TRAC warning light, or by connecting the Techstream.

3. WARNING LIGHT AND INDICATOR LIGHT CHECK





(a) Release the parking brake.
NOTE: When releasing the parking brake, set chocks to hold the vehicle for safety.
HINT: When the parking brake is applied or the level of the brake fluid is low, the BRAKE warning light comes on.

(b) Check that the ABS warning light, VSC TRAC warning light, BRAKE warning light, VSC OFF indicator light, SLIP indicator light and AUTO LSD indicator light come on when the ignition switch is turned to ON, and go off in about 3 seconds.
HINT: If the lights do not illuminate, confirm whether the bulbs have burned out, and also check the wire harness between the skid control ECU and the combination meter.
If the light remains on, troubleshoot the effected light circuit by proceeding to the page indicated below.