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YES: Go to Step 3. NO: This diagnosis is complete. STEP 3. Scan tool MB991958 data list ⦆ Item 04: Coupling current command value ⦆ Item 05: Coupling current monitor value Q:Is the check result normal? YES: Replace AWD-ECU. (Refer to P.27C-92.) NO: Go to Step 4. STEP 4. Check the following connector: ⦆ C-128 AWD-ECU connector ⦆ D-113 electronic control coupling solenoid connector ⦆ C-31 intermediate connector Q:Are the connectors and terminals in good condition? YES: Go to Step 5. NO: Repair the connector(s) or terminal(s). Then go to Step 10. STEP 5. Wiring harness check Q:Is the wiring harness in good condition? YES: Go to Step 6. NO: Repair damage or other problem in the wiring harness. Then go to Step 10. STEP 6. Resistance measurement between electronic 1 2 ZC3052000001 D-119 Electronic Disconnect the D-119 connector, and measure the resistance Standard value: 2.2 - 4.0 ohm Q:Is the measured resistance value within the standard value range? YES: Go to Step 7. NO: Replace the electronic control coupling. (Refer to P.27C-94.) Then go to Step 10. STEP 7. Voltage measurement at the AWD-ECU connector (1) Disconnect the C-128 AWD-ECU connector. ELECTRONIC CONTROL AWD 27C-23 DIAGNOSIS |