Honda Accord: A/C Pressure Switch Circuit Troubleshooting
NOTE: • Do not use this troubleshooting procedure if any of the following items are operative: The condenser fan, the radiator fan, or the 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 22-134).
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
-Go to step 3.
NO
-Repair the problem in the blower motor circuit (see page 21-38).
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 HVAC control unit 24P connector terminal No. 21 and body ground.
HVAC CONTROL UNIT 24P CONNECTOR
Wire side of female terminals
Is there battery voltage? YES
-Go to step 14.
NO
-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 A/C pressure switch 2P connector No. 2 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 an 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 terminals No. 1 and No. 2 of A/C pressure switch.
A/C PRESSURE SWITCH
Is there continuity? YES
-Go to step 12.
NO-
Replace the A/C pressure switch.
12. Connect A/C pressure switch 2P connectorterminal No. 2 to body ground with a jumper wire.
A /C PRESSURE SWITCH 2P CONNECTOR
Wire side of female terminals
Do the compressor and fans operate? YES
-Go to step 13.
NO
-Check for B-CAN codes (see page 22-134).
13. Check for continuity between HVAC control unit 24P connectorterminal No. 21 and A/C pressure switch 2P connectorterminal No. 1.
HVAC CONTROL UNIT 24P CONNECTOR
Wire side of female terminals
A /C PRESSURE SWITCH 2P CONNECTOR
Wire side of female terminals
Is there continuity? YES
-Check for loose wires or poor connections at the HVAC control unit 24P connector and at the A/C pressure switch 2P connector.
NO
-Repair an open in the wire between the HVAC control unit and A/C pressure switch.
14. Turn the ignition switch to LOCK (0).
15. Measure the evaporator temperature sensor resistance between HVAC control unit 24P connector terminal No. 14 and No. 15.
HVAC CONTROL UNIT 24P CONNECTOR
Wire side of female terminals
Is resistance less than 24 kO? YES-
Check for loose wires or poor connections at the HVAC control unit 24P connector. If the connections are good, substitute a known-good HVAC control unit and recheck. If the symptom goes away, replace the original HVAC control unit (see page 21-65).
NO
-Test the evaporator temperature sensor (see page21~58).
A/C Compressor Clutch Circuit Troubleshooting
NOTE: • It is normal for the A/C compressor to turn off under certain conditions, such as low idle, high engine coolant temperature, hard acceleration, or high/low refrigerant pressure. в ...A/C Signal 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 for DTC 12. Before performing any other troubleshoo ...See also:
Using the Remote Transmitter
Press the trunk release button for
approximately one second to unlock and open
the trunk.
...
Audio System Basic Operation
To use the audio system function, the power mode must be in ACCESSORY or ON.
Use the interface dial or MENU button to
access some audio functions.
Press to switch between the
normal and
ext ...
Refueling
1. Park with the driver’s side closest
to the service station pump.
2. To open the fuel fill door, push
down on the lever located to the
left of the driver’s seat.
Gasoline is highly f ...