DTC B2175

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DTC B2175

B3E090201072W32

DTC B2175 | A/C request signal circuit short to ground
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DETECTION CONDITION | Short to GND in wiring harness between PJB and climate control unit (A/C ON request)
POSSIBLE CAUSE | • Short to GND in wiring harness between PJB terminal J-04 AF and climate control unit terminal M • Climate control unit malfunction • PJB malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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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 PJB CONNECTOR • Disconnect the PJB connector. • Inspect the PJB 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 PJB terminal J-04 AF (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. (See CLIMATE CONTROL UNIT INSPECTION [MANUAL AIR CONDITIONER].) • 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 PJB memory using the WDS or equivalent.
• Perform the self-test.
(See PJB SELF-TEST.)
• Is the same DTC present?

Yes

Replace the PJB.
(See PASSENGER JUNCTION BOX (PJB) REMOVAL/INSTALLATION.)

No | DTC troubleshooting completed.