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STEP 1. Check harness connector B-13 at the left bank Q:Is the harness connector in good condition? YES: Go to Step 2. NO: Repair it. Refer to GROUP 00E, Harness Connector Inspection P.00E-2. Then go to Step 4. STEP 2. Check for short circuit to power supply between the Q:Is the harness wire in good condition? YES: Go to Step 3. NO: Repair it. Then go to Step 4. STEP 3. Check the trouble symptoms. (1) Carry out a test drive with the drive cycle pattern. Refer to (2) Check the diagnostic trouble code (DTC). Q:Is DTC P0158 set? YES: Replace the ECM. When the ECM is replaced, register the ID code. Refer to GROUP 42B, ID Code Registration NO: It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use STEP 4. Test the OBD-II drive cycle. (1) Carry out a test drive with the drive cycle pattern. Refer to (2) Check the diagnostic trouble code (DTC). Q:Is DTC P0158 set? YES: Retry the troubleshooting. NO: The inspection is complete. MULTIPORT INJECTION SYSTEM (MFI) <DIAGNOSIS> 13Ab-283 DIAGNOSTIC TROUBLE CODE PROCEDURES |