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MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS TSB Revision MULTIPORT FUEL INJECTION (MFI) <3.0L ENGINE> 13B-77 OBD-II DRIVE CYCLE PATTERN Refer to Diagnostic Function − OBD-II Drive Cycle − Pattern 2 . . TROUBLESHOOTING HINTS (The most • Right bank heated oxygen sensor (rear) heater failed. • Connector damage. • Harness damage • ECM failed. DIAGNOSIS Required Special Tools: • MB998464: Test Harness STEP 1. Check harness connector B-02 at the right bank YES : Go to Step 2. Connector Inspection P.00E-2 . Then go to Step 6. STEP 2. Check the right bank heated oxygen sensor (rear). connector B-02 and connect test harness special tool, (2) Measure the resistance between heated oxygen sensor connector terminal No. 1 (red clip) and terminal No. 3 (blue Standard value: 11 − 18 Ω [at 20°C (68°F)] Q: Is the measured resistance between 11 and 18 ohms [at 20 °C (68°F)]? YES : Go to Step 3. Then go to Step 6. STEP 3. Measure the power supply voltage at right bank side. (2) Turn the ignition switch to the "ON" position. • Voltage should be battery positive voltage. (4) Turn the ignition switch to the "LOCK" (OFF) position. present? A-33X (terminal No. 2) and the right bank heated AK700179 MD998464 Red Blue AB Heated 1 2 3 4 AK700180 B-02 harness AB |