Honda Accord: Alternator FR Signal Circuit
Troubleshooting - Idle Control System - Fuel and Emissions - Honda Accord MK8 2008-2012 Service ManualHonda Accord: Alternator FR Signal Circuit Troubleshooting

1. Start the engine, and let it idle.

2. Monitor the ALTERNATOR in the DATA LIST with the HDS.

3. Check if the indicated percentage varies when the headlight switch is turned on.

Does the percentage wary? YES

-The alternator signal circuit is OK.gH NO

-Go to step 4.

4. Turn the headlight switch off and ignition switch to LOCK (0).

5. Jump the SCS line with the HDS.

6. Disconnect the alternator 4P connector.

7. Disconnect ECM/PCM connector B (49P).

8. Check for continuity between ECM/PCM connector terminal B47 and body ground.

ECM/PCM CONNECTOR B (49P)

Terminal side of female terminals


Terminal side of female terminals

Is there continuity? YES-

Repair short in the wire between the ECM/PCM (B47) and the alternator.

NO

-Update the ECM/PCM if it does not have the latest software (see page 11-203), or substitute a known-good ECM/PCM (see page 11-7), then recheck.

If the symptom/indication goes away and the ECM/PCM was updated, troubleshooting is complete.

If the symptom/indication goes away and the ECM/PCM was substituted, replace the original ECM/PCM (see page 11-204).

    A/C Signal Circuit Troubleshooting
    1. Start the engine, and let it idle. 2. Turn the blower switch on. 3. Turn the A/C switch on. 4. Check the A/C CLUTCH in the DATA LIST with the HDS. Does it indicate ON? YES-Go to step ...

    PSP Switch Signal Circuit Troubleshooting
    1. Start the engine, and let it idle. 2. Align the steering wheel straight ahead. 3. Check the PSP SWITCH in the DATA LIST with the HDS. Does it indicate ON? YES-Go to step 4. NO-Go to s ...

    See also:

    Carrying Items in the Passenger Compartment
    Store or secure all items that could be thrown around and hurt someone during a crash. Do not put any items on top of the rear shelf. They can block your view and be thrown around the vehic ...

    Rear Seat Access
    Driver’s Side On all V6 models and 4-cylinder EX-L model To get into the rear seat on the driver’s side, open the door and pull the release lever up on the side of the seat-back. The s ...

    Adjust the Head Restraints
    Adjust the driver’s head restraint so the center of the back of your head rests against the center of the restraint. Have passengers adjust their head restraints properly as well. Taller ...