Diagnosis System (from 07/2011)

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ANTI-LOCK BRAKE SYSTEM (for Hatchback): DIAGNOSIS SYSTEM

1. DESCRIPTION

When troubleshooting a vehicle with the diagnosis system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the vehicle's skid control ECU (brake actuator assembly).

The skid control ECU (brake actuator assembly) records DTCs when the ECU detects a malfunction in the ECU itself or in its circuits.

To check the DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream enables you to clear the DTCs, activate the various actuators, and check the Freeze Frame Data and Data List.

(a) Check the battery voltage.

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge the battery before proceeding to the next step.

(b) Check the DLC3 General Information.

2. DIAGNOSIS

(a) If the skid control ECU (brake actuator assembly) detects a malfunction, the ABS warning, brake warning will come on in order to warn the driver.

(b) The DTCs are simultaneously stored in memory. The DTCs can be read by connecting SST between terminals TC and CG of the DLC3 and observing the blinking pattern of the ABS warning light, or by connecting the Techstream Anti-Lock Brake System (for Hatchback).

(c) This system has a Test Mode (signal check) function Test Mode Procedure (from 07/2011).

3. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

(a) Release the parking brake.

NOTICE:
When releasing the parking brake, move the shift lever to P (for AT) or set chocks (except AT) to prevent the vehicle from rolling.

HINT
When the parking brake is applied or the level of the brake fluid is low, the brake warning light comes on.

(b) When the ignition switch is turned to ON, check that the ABS warning and brake warning lights come on for approximately 3 seconds.

HINT
If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS warning and brake warning light circuits.

If the indicator remains on or does not come on, proceed to troubleshooting for the light circuits listed below.