Honda Civic. Manual — part 758

YES - Repair the short in the wires.

NO - Go to step 12.

12. Turn the ignition switch ON (II), and check the same terminals for voltage to

body ground. See Fig. 21.

Is there any voltage?

YES -Repair any short to power in the wires between the HVAC control panel
and the mode control motor. This short may also damage the HVAC control
panel. Repair the short to power before replacing the HVAC control panel.

NO -Check for loose wires or poor connections at the HVAC control panel 24P
connector and at the mode control motor 7P connector. If the connections are
good, substitute a known-good HVAC control panel, and recheck. If the
symptom/indication goes away, replace the original HVAC control panel.

DTC INDICATOR 5: A PROBLEM IN THE MODE CONTROL LINKAGE, DOORS, OR MOTOR

1. Clear the DTC (see CLEAR THE DTCS ).
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HVAC control unit (see HOW TO USE THE

SELF-DIAGNOSTIC FUNCTION ).

4. Check for DTCs.

Is DTC 5 indicated?

YES - Go to step 5.

NO - Intermittent failure.

5. Turn the ignition switch to LOCK (0).
6. Test the mode control motor (see MODE CONTROL MOTOR TEST ).

Is the mode control motor OK?

YES - Go to step 7.

2008 Honda Civic EX

2006-08 HVAC Heating/Air Conditioning - Civic (All Except Hybrid)

NO - Replace the mode control motor (see AIR MIX CONTROL MOTOR
REPLACEMENT ), or repair the mode control linkage or doors.

7. Check for continuity between the following terminals of the HVAC control

panel 24P connector and the mode control motor 7P connector.

CONTINUITY CHECK INDEX

Fig. 22: Checing Continuity Between HVAC Control Connector & Mode
Control Motor Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Go to step 8.

24P

7P

14

1

15

2

2008 Honda Civic EX

2006-08 HVAC Heating/Air Conditioning - Civic (All Except Hybrid)

NO -Repair any open in the wires between the HVAC control panel and the
mode control motor.

8. Check for continuity between body ground and the HVAC control panel 24P

connector terminals No. 14 and 15 individually.

Fig. 23: Checking Continuity Between Ground & HVAC Control Panel
Connector
Courtesy of AMERICAN HONDA MOTOR CO., INC.

Is there continuity?

YES -Repair short to body ground in the wires between the HVAC control
panel and the mode control motor.

NO -Substitute a known-good HVAC control panel, and recheck. If the
symptom/indication goes away, replace the original HVAC control panel.

DTC INDICATOR 6: A PROBLEM IN THE BLOWER MOTOR CIRCUIT

1. Clear the DTC (see CLEAR THE DTCS ).
2. Turn the ignition switch to LOCK (0), and then ON (II).
3. Do the self-diagnostic with the HVAC control unit (see HOW TO USE THE

SELF-DIAGNOSTIC FUNCTION ).

2008 Honda Civic EX

2006-08 HVAC Heating/Air Conditioning - Civic (All Except Hybrid)

4. Check for DTCs.

Is DTC 6 indicated?

YES - Go to step 5.

NO - Intermittent failure, check for loose wires or poor connections on the
blower motor circuit.

5. Turn the ignition switch to LOCK (0).
6. Check the No. 9 (40 A) fuse in the under-hood fuse/relay box, and the No. 36

(10 A) fuse in the under-dash fuse/relay box.

Are the fuses OK?

YES - Go to step 7.

NO - Replace the fuses, and recheck. If the fuses blow again, check for a short
in the No. 9 (40 A) and No. 36 (10 A) fuses circuit.

7. Connect the blower motor 2P connector terminal No. 2 to body ground with a

jumper wire.

Fig. 24: Connecting Blower Motor 2P Connector Terminal No. 2 To Body
Ground With Jumper Wire

8. Turn the ignition switch ON (II).

Does the blower motor run?

2008 Honda Civic EX

2006-08 HVAC Heating/Air Conditioning - Civic (All Except Hybrid)