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OPERATION DTC SET CONDITIONS ⦆ IG1 voltage: More than 17 V ⦆ Battery voltage: Less than 16 V TROUBLESHOOTING HINTS Current trouble ⦆ Malfunction of IG1 relay in ETACS-ECU ⦆ Damaged wiring harness and connectors ⦆ Short or open circuit between the battery and AWD- ⦆ Malfunction of alternator or other power supply Past trouble ⦆ Intermittent wiring harness or connector failure NOTE: For diagnosis procedures, refer to "How to treat past trouble". (Refer to GROUP 00, How ⦆ Intermittent malfunction of ETACS-ECU (malfunction of IG1 relay) ⦆ Malfunction of alternator or other power supply DIAGNOSIS ⦆ MB991958: Scan Tool (M.U.T.-III Sub Assembly) ⦆ MB991824: Vehicle Communication Interface ⦆ MB991827: M.U.T.-III USB Cable ⦆ MB991910: M.U.T.-III Main Harness A STEP 1. Scan tool MB991958 CAN bus diagnostics Q:Is the check result normal? YES: Go to Step 3. NO: Repair the CAN bus line. (Refer to GROUP 54D - CAN bus diagnostic chart P.54D-17.) On completion, go to STEP 2. Check whether the DTC is reset after repairing the (1) Erase the DTC. (2) Turn the ignition switch from the LOCK (OFF) position to the (3) Check if the DTC is set. Q:Is the DTC No. C211D set? YES: Go to Step 3. NO: This diagnosis is complete. STEP 3. Check the following connector: ⦆ C-128 AWD-ECU connector ⦆ C-309, C-313, C-317 ETACS-ECU connector Q:Are the connectors and terminals in good condition? YES: Go to Step 4. NO: Repair the connector(s) or terminal(s). Then go to Step 8. ELECTRONIC CONTROL AWD 27C-43 DIAGNOSIS |