Diagnosis System

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: VEHICLE STABILITY CONTROL SYSTEM: DIAGNOSIS SYSTEM; 2013 MY FR-S [03/2012 -]

1. DESCRIPTION

When troubleshooting a vehicle with a diagnosis system, the only difference from the usual troubleshooting procedure is connecting the Techstream to the vehicle and reading various data output from the skid control ECU.

The skid control ECU records DTCs when it detects a malfunction in itself or in its circuits.

To check for DTCs, connect the Techstream to the DLC3 on the vehicle. The Techstream can be used to clear the DTCs, activate 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 .

2. DIAGNOSIS

(a) If the skid control ECU detects a malfunction, the ABS warning, brake warning, and/or slip indicator lights will come on in order to warn the driver.

(b) The DTCs are simultaneously stored in memory.

The DTCs can be read by connecting the Techstream Reading and Clearing Diagnostic Trouble Codes.

(c) This system has a Test Mode (signal check) function.

The DTCs can be read by connecting the Techstream Test Mode Procedure.

3. WARNING LIGHT AND INDICATOR LIGHT INITIAL CHECK

(a) Release the parking brake.

NOTICE:
Before releasing the parking brake, move the shift lever to P (for automatic transmission) or set chocks to prevent the vehicle from rolling.

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 to ON, check that the ABS warning, brake warning, TR(A)C OFF indicator, VSC OFF indicator, VSC SPORT indicator and slip indicator lights all come on.

HINT
* If the warning light and indicator light check result is not normal, proceed to troubleshooting for the ABS warning, brake warning, TR(A)C OFF indicator, VSC OFF indicator, VSC SPORT indicator and slip indicator light circuits. Symptom Related Diagnostic Procedures
* If any of the indicators remains on or does not come on, proceed to troubleshooting for the light circuits listed below.





(1) When the ignition switch is turned to ON, check that the brake warning, TR(A)C OFF indicator, VSC OFF indicator and VSC SPORT indicator lights turn off after 3 seconds.

(2) When the engine is started, check that the ABS warning and slip indicator lights turn off after 3 seconds.