TSB : DTC U1104: SAS CAN timeout/Not equipped: Diagnosis

Details

STEP 1. Using scan tool (M.U.T.-III), diagnose the CAN bus line. CAUTION: To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III). Connect scan tool (M.U.T.-III). Refer to " HOW TO CONNECT THE SCAN TOOL ." Turn the ignition switch to the "ON" position. Diagnose the CAN bus line. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the CAN bus line found to be normal? YES: Go to Step 2. NO: Repair the CAN bus line (Refer to, DIAGNOSIS ). STEP 2. Using scan tool (M.U.T.-III), read the EPS-ECU diagnostic trouble code Check if DTC is stored in the EPS-ECU. Q: Is the DTC stored? YES: Diagnose the EPS-ECU. Then go to Step 4 NO: Go to Step 3. STEP 3. Using scan tool (M.U.T.-III), read diagnostic trouble code No. U1104 for other system. Check if DTC U1104 is stored in ASC-ECU. Q: Is the DTC stored? YES: Replace the EPS-ECU (Refer to, EPS-ECU ). NO: Go to Step 4. STEP 4. Recheck for diagnostic trouble code. Check again if the DTC is stored in the SRS-ECU. Erase the DTC. Turn the ignition switch from "LOCK" (OFF) position to "ON" position. Check if DTC is stored. Turn the ignition switch to the "LOCK" (OFF) position. Q: Is the DTC stored? YES: Replace the SRS-ECU. NO: There is an intermittent malfunction such as poor engaged connector(s) or open circuit (Refer to, HOW TO COPE WITH INTERMITTENT MALFUNCTIONS ).