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SECURITY ALARM CHASSIS ELECTRICAL 54A-594 DIAGNOSIS PROCEDURE STEP 1. M.U.T.-III diagnosis code. Q: Is the diagnosis code set? YES : Diagnose the ETACS-ECU. Refer to GROUP 54A, Diagnosis . NO : Go to Step 2. STEP 2. Security alarm siren operation check triggered" condition. (2) Open the driver's door by using the ignition key. Q: Is the check result normal? YES : The trouble can be an intermittent malfunction (Refer to GROUP 00 − How to Cope with Intermittent Malfunction ). NO : Go to Step 3. STEP 3. Replace the security alarm siren position to the ON position. (3) Check if diagnosis code is set. Q: Is the diagnosis code set? YES : Replace the ETACS-ECU. NO : Replace the security alarm siren. Code No.B120B Security alarm sensor error CAUTION Before replacing the ECU or sensor, ensure that the power supply circuit, the earth circuit and the . • Diagnosis code No.B120B may be set when the • Diagnosis code No.B120B is set when the ultra- TROUBLESHOOTING HINT DIAGNOSIS PROCEDURE STEP 1. M.U.T.-III diagnosis code. Q: Is the diagnosis code set? YES : Diagnose the ETACS-ECU. Refer to GROUP 54A, Diagnosis . NO : Go to Step 2. STEP 2. Security alarm sensor operation check 1. With the windows of the vehicle opened, set the security alarm to the "Ready to be triggered" con- 2. Put the arm from the outside to the inside of the vehicle. 3. Check that the security alarm siren sounds. Tilt angle sensor check 1. Set the security alarm to the "Ready to be trig- gered" condition. 2. Raise the front wheels or rear wheels. Q: Is the check result normal? YES : The trouble can be an intermittent malfunction (Refer to GROUP 00 − How to Cope with Intermittent Malfunction ). NO : Go to Step 3. STEP 3. M.U.T.-III diagnosis code. Q: Is diagnosis code No. B120A set? |