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M-ASTC DIAGNOSIS TSB Revision MITSUBISHI ACTIVE SKID AND TRACTION CONTROL SYSTEM 35C-57 DTC 83: Steering wheel sensor not initialized . M-ASTC DTC SET CONDITION . TROUBLESHOOTING HINTS • The steering wheel sensor is defective • The M-ASTC-ECU is defective. DIAGNOSIS Required Special Tools: • MB991502: Scan Tool (MUT-II) STEP 1. Make the system learn the neutral point of the Using scan tool MB991502 1. Connect scan tool MB991502 to the data link connector. 2. Turn the ignition switch to the "ON" position. °or more, and then return it to the neutral (straight forward) position. 4. Execute item No.14 "ST SNSR: 0 " on the Actuator test. light is off. 6. Turn the ignition switch to the "LOCK" (OFF) position. Not using scan tool MB991502 CAUTION 1. If a different diameter or size of tires are equipped, the M- ASTC-ECU may not learn the neutral position. Turn the steering wheel 8 °or more, and then return the steering wheel to straight-ahead position. 2. Drive the vehicle straight forward at 35 km/h (25 mph) for approximately one second. 3. Ensure that the Active skid control system OFF indicator light is off. Q: Does the M-ASTC-ECU set DTC 83? YES : Replace the steering wheel sensor. Refer to . then go to STEP 2. NO : Go to Step 2. STEP 2. Check the diagnostic trouble code. YES : Replace the M-ASTC-ECU. ACX01539AE MB991502 16-PIN |