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01 02 SNR9A00A14100012905FAAT00 − − − − YES NO YES NO 4-29 Alternator Control Circuit Troubleshooting BATTERY ALTERNATOR C (WHT/GRN) ALT C ECM/PCM CONNECTOR B (44P) 1. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see step 2 on page 11-3). 2. Turn the ignition switch to ON (II). 3. Make sure the HDS communicates with the vehicle and the engine control module (ECM)/powertrain 4. Check for DTCs (see page 11-3). If a DTC is present, diagnose and repair the cause before continuing 5. Disconnect the alternator 4P connector. 6. Start the engine, and turn on the headlights to high beam. 7. Measure the voltage between alternator 4P connector terminal No. 2 and the positive terminal Go to step 11. Go to step 8. 8. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0). NOTE: This step must be done to protect the ECM/ 9. Disconnect ECM/PCM connector B (44P). 10. Check for continuity between ECM/PCM connector terminal B41 and body ground. Repair short to ground in the wire between alternator 4P connector terminal No. 2 and ECM/ Update the ECM/PCM if it does not have the latest software (see page 11-227), or substitute a 11. Jump the SCS line with the HDS, then turn the ignition switch to LOCK (0). NOTE: This step must be done to protect the ECM/ 12. Disconnect ECM/PCM connector B (44P). Wire side of Terminal side of female terminals Is ther e 1 V or less? Is ther e continuity? |