Honda Accord 2008 Manual page 2021

07/11/02 09:44:38 61TA0000_210_0157
Climate Control
A/C Pressure Switch Circuit Troubleshooting
NOTE:
• If the blower motor does not run at all speeds, the A/C
compressor will be inoperative. Run the self-
diagnostic function, and check the DTC B1241. Before
performing any other troubleshooting, repair the
cause of the inoperative blower motor.
• 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 symptom troubleshooting, check for
powertrain DTCs (see page 11-3). Also check for
B-CAN codes (see page 22-96).
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 climate control unit connector A (28P).
5. Turn the ignition switch to ON (II).
6. Measure the voltage between the climate control
unit connector A (28P) No. 21 terminal and body
ground.
＊０１
*1: With navigation
*2: Without navigation
Is there battery voltage?
YES
NO −
21-156
− Go to step 3.
Repair the problem in the blower motor
CLIMATE CONTROL UNIT CONNECTOR A (28P)
1
PUR*
2
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.
ＴＡ０８ＡＨ７Ｇ１０１０００１２０６２ＦＡＡＴ８０
PUR
＊０２
＊０３