Honda 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

*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

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).