Is there about 5 V?
YES -
Go to step 20.
NO -
Check for a loose wire or poor connection at climate control unit connector A (40P). If the connection is good, substitute a known-good climate
control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit See: Heating and Air
Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?
20. While measuring the voltage as described in step 19, reconnect these items individually and note the voltage reading each time:
- Driver's air mix control motor
- Passenger's air mix control motor
- Rear air mix control motor
- Humidity/in-car temperature sensor
- A/C pressure sensor
Does the voltage remain at about 5 V?
YES -
Substitute a known-good climate control unit, and recheck. If the symptom/indication goes away, replace the original climate control unit See:
Heating and Air Conditioning/Control Assembly/Service and Repair/Climate Control Unit Removal/Installation.?
NO -
Replace the component that caused the voltage drop.?
Auto
DTC Troubleshooting: B1205 (AUTO), B1206 (AUTO), B1207 (AUTO)
DTC B1205:
Climate Control Unit Lost Communication with Gauge Control Module (VSP/NE message)
DTC B1206 or DTC indicator AUTO:
Climate Control Unit Lost Communication with Gauge Control Module (ECT message)
DTC B1207:
Climate Control Unit Lost Communication with Gauge Control Module (ILLUMI message)
NOTE: If you are troubleshooting multiple DTCs, be sure to follow the instructions in the B-CAN system diagnosis test mode A See: Powertrain
