Honda Accord 2008 Manual page 1913

07/11/02 09:40:51 61TA0000_210_0049
Heating/Air Conditioning
A/C Pressure Switch Circuit Troubleshooting
NOTE:
• Do not use this troubleshooting procedure if any of
the following items are operative; condenser fan,
radiator fan, A/C compressor, or if the heater is
inoperative. Refer to the symptom troubleshooting
index.
• Check the A/C high-side pressure.
• Before doing any symptom troubleshooting, check
for powertrain DTCs (see page 11-3). Also check for
B-CAN codes (see page 22-120).
1. Turn the ignition switch to ON (II).
2. Check if the blower motor operates at all speeds.
Does the blower motor operate at all speeds?
YES
NO −
circuit (see page 21-141).
3. Turn the ignition switch to LOCK (0).
4. Disconnect the HVAC control unit 24P connector.
5. Turn the ignition switch to ON (II).
6. Measure the voltage between the HVAC control
unit 24P connector No. 21 terminal and body
ground.
＊０１
Is there battery voltage?
YES
−
NO
21-48
− Go to step 3.
Repair the problem in the blower motor
HVAC CONTROL UNIT 24P CONNECTOR
LT BLU
Wire side of female terminals
− Go to step 14.
Go to step 7.
7. Turn the ignition switch to LOCK (0).
8. Disconnect the A/C pressure switch 2P connector.
9. Turn the ignition switch to ON (II).
10. Measure the voltage between the A/C pressure
switch 2P connector No. 2 terminal and body
ground.
A/C PRESSURE SWITCH 2P CONNECTOR
Wire side of female terminals
Is there battery voltage?
YES − Go to step 11.
−
NO Repair open in the wire between the A/C
pressure switch and the MICU. If the wire is OK,
substitute a known-good MICU and recheck. If the
symptom goes away, replace the original MICU.
11. Check for continuity between the No. 1 and No. 2
terminals of the A/C pressure switch.
A/C PRESSURE SWITCH
Is there continuity?
−
YES Go to step 12.
NO − Replace the A/C pressure switch.
ＴＡ０８ＡＨ６Ｇ１０１０００１２０６２ＦＡＡＴ２０
PUR
＊０２
＊０３