Honda Accord: Climate Control Power and Ground Circuit Troubleshooting - Climate Control - Heating, Ventilation, and Air Conditioning - Honda Accord MK8 2008-2012 Service ManualHonda Accord: Climate 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 climate control unit connector A (28P).

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

4. Measure the voltage between climate control unit connector A (28P) terminal No. 9 and body ground.

CLIMATE CONTROL UNIT CONNECTOR A (28P)

* 1 : With navigation


* 1 : With navigation

*2: Without navigation

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 climate control u n i t .

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

6. Check for continuity between .-climate control unit connector B (12P) terminal No. 3 and body ground.

CLIMATE CONTROL UNIT CONNECTOR B (12P)

Wire side of female terminals


Wire side of female terminals

Is there continuity? YES

-Check for loose wires or poor connections at climate control unit connector B (12P). If the connections are good, substitute a known-good climate control unit (with navigation) (see page 21-190), (without navigation) (see page 21-191), and recheck.

NO

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

    DTC Troubleshooting
    DTC indicator A: Climate Control Unit Internal Error NOTE: Check the battery condition (see page 22-90) and the charging system (see page 4-25). 1. Turn the ignition switch to LOCK (0), and then ...

    Navigation Communication Line Circuit Troubleshooting
    1. Operate the climate control system in several modes. Is the climate control system OK? YES-Go to step 2. NO-Do the self-diagnostic function with the HDS (see page 21-102) or climate control ...

    See also:

    Shift Lever Removal
    1. Remove the center console (see page 20-158). 2. Move the shift lever to R. 3. Remove the nut securing the shift cable end. 4. Unlock the retainer (A). 5. Rotate the socket holder retain ...

    Trunk Lid Adjustment
    1. Remove the rear shelf (see page 20-128). 2. Pry up the notches (A) to release the rear hooks (B), and pull up the cap (C) to release the side hooks (D), then remove the cap. 3. Slightly lo ...

    Crossover Network Control Unit Removal/Installation
    Driver's Door Speaker Crossover Network Control Unit 1. Remove the driver's dashboard lower cover (see page 20-166). 2. Disconnect the connector (A), then remove the driver's door speaker cross ...