Honda Accord: HVAC Control Power and Ground
Circuit Troubleshooting - Heating/Air Conditioning - Heating, Ventilation, and Air Conditioning - Honda Accord MK8 2008-2012 Service ManualHonda Accord: HVAC Control Power and Ground Circuit Troubleshooting

1. Check the No. 16 (7.5 A) fuse in the driver's under-dash fuse/ relay box.

Is the fuse OK? YES

-Go to step 2.

NO

-Replace the fuse, and recheck. If the fuse blows again, check for a short in the No. 16 (7.5 A) fuse circuit.

2. Disconnect the HVAC control unit 24P connector.

3. Turn the ignition switch to ON (II).

4. Measure the voltage between HVAC control unit 24P connector terminal No. 11 and body ground.

HVAC CONTROL UNIT 24P CONNECTOR

Wire side of female terminals


Wire side of female terminals

Is there battery voltage? YES

-Go to step 5.

NO

-Repair an open in the wire between the No. 16 (7.5 A) fuse in the driver's under-dash fuse/relay box and the HVAC control unit.

5. Turn the ignition switch to LOCK (0).

6. Check for continuity between HVAC control unit 24P connector terminal No. 23 and body ground.

HVAC CONTROL UNIT 24P CONNECTOR

Wire side of female terminals


Wire side of female terminals

Is there continuity? YES

-Check for loose wires or poor connections at the HVAC control unit 24P connector. If the connections are good, substitute a known-good HVAC control unit (see page 21-65), and recheck.

NO

-Check for an open in the wire between the HVAC control unit and body ground. If the wire is OK, check for poor ground at G401 (see page 22-40).

    Recirculation Control Motor Circuit Troubleshooting
    908-09 models 4-door with A/T and '10 model with AT 1. Check the No. 16 (7.5 A) fuse in the driver's under-dash fuse/ relay box. Is the fuse OK? YES-Go to step 2. NO-Replace the fuse, and re ...

    A/C Condenser Fan Circuit Troubleshooting
    NOTE: • Do not use this troubleshooting procedure if the radiator fan and/or the A/C compressor is inoperative. Refer to the symptom troubleshooting index. • Before doing symptom tro ...

    See also:

    Shift Lock Release, Release Spring, and Release Shaft Replacement
    Type A Shift Lever 1. Remove the shift lever assembly (see page 14-222). 2. Remove the A/T gear position indicator panel from the shift lever (see page 14-227). 3. Release the lock (A) of the ...

    Cam Chain Removal
    NOTE: Keep the cam chain away from magnetic fields. 1. Remove the front wheels. 2. Remove the splash shield (see step 25 on page 5-5). 3. Remove the drive belt (see page 4-30). 4. Remove t ...

    Vehicle Identification Number
    Manufacturer, Make, and Type of Vehicle 1HG: Honda of America Mfg., Inc. Honda passenger vehicle Line, Body, and Engine Type CS1: Accord Coupe/K24Z3 Body Type and Transmission Type A: 2-door ...