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:

    ELD Replacement
    1. Do the battery terminal disconnection procedure (see page 22-91). 2. Remove the upper cover (A), then remove the two positive ( + ) terminals (B). 3. Remove the under-hood fuse/relay box (C ...

    How the Side Airbag Off Indicator Works
    This indicator alerts you that the passenger’s side airbag has been automatically shut off. It does not mean there is a problem with your side airbags. When you turn the ignition switch t ...

    Installing a Child Seat with LATCH
    Your vehicle is equipped with LATCH (Lower Anchors and Tethers for CHildren) at the outer rear seats. The lower anchors are located between the seat-back and seat bottom, and are to be used ...