DTC B2175 [BCM]

id0902f5832400

DTC B2175

A/C switch circuit short to ground (with manual air conditioner)
DETECTION CONDITION
Short to GND in wiring harness between BCM and climate control unit (A/C ON request)
POSSIBLE CAUSE
•  Short to GND in wiring harness between BCM terminal 3L and climate control unit terminal J
•  Climate control unit malfunction
•  BCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
INSPECT CLIMATE CONTROL UNIT CONNECTOR
•  Disconnect the climate control unit connector.
•  Inspect the climate control unit connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
2
INSPECT BCM CONNECTOR
•  Disconnect the BCM connector.
•  Inspect the BCM connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion).
•  Is there any malfunction?
Yes
Repair or replace the terminal, then go to Step 5.
No
Go to the next step.
3
INSPECT CLIMATE CONTROL UNIT SIGNAL CIRCUIT FOR SHORT TO GND
•  Inspect for continuity between BCM terminal 3L (wiring harness-side) and body GND.
•  Is there continuity?
Yes
Repair or replace the wiring harness for a possible short to GND, then go to Step 5.
No
Go to the next step.
4
INSPECT CLIMATE CONTROL UNIT
•  Inspect the climate control unit.
•  Is there any malfunction?
Yes
Replace the climate control unit, then go to the next step.
(See CLIMATE CONTROL UNIT REMOVAL [MANUAL AIR CONDITIONER], CLIMATE CONTROL UNIT INSTALLATION [MANUAL AIR CONDITIONER].)
No
Go to the next step.
5
VERIFY TROUBLESHOOTING COMPLETED
•  Make sure to reconnect all disconnected connectors.
•  Clear the DTC from the BCM memory using the M-MDS.
•  Turn the ignition switch to LOCK position then ON position.
•  Is the same DTC present?
Yes
Replace the BCM.
(See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION.)
No
DTC troubleshooting completed.