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Past trouble ⦆ Tire with incorrect diameter (high-pressure type ⦆ The tire pressure has been adjusted due to 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) Drive the vehicle straight with throttle opening angle of (3) Check if the DTC is set. Q:Is the DTC No. C1078 set? YES: Go to Step 3. NO: This diagnosis is complete. STEP 3. Tire check Q:Are all installed wheels and tires same in size? YES: Go to Step 4. NO: Install the same size wheels and tires. Then go to Step 4. STEP 4. Tire pressure check Q:Is the tire pressure normal? YES: Go to Step 5. NO: Adjust the tire pressure. Then go to Step 5. STEP 5. Check whether the DTC is reset. Q:Is the DTC No. C1078 set? YES: Go to Step 6. NO: This code is set because the tire pressure was improper or a tire with incorrect diameter is installed. ELECTRONIC CONTROL AWD 27C-11 DIAGNOSIS |