NO -
Repair an open in the wire between the climate control unit and the rear evaporator temperature sensor.?
9. Check for continuity between climate control unit connector A (40P) terminal No. 8 and rear evaporator temperature sensor 2P connector
terminal No. 1.
Is there continuity?
YES -
Check for loose wires or poor connections at climate control unit connector A (40P), B (14P), and at the rear evaporator temperature sensor 2P
connector. If the connections are 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.?
NO -
Repair an open in the wire between the climate control unit and the rear evaporator temperature sensor.?
N and Auto
DTC Troubleshooting: B1237 (N and AUTO)
DTC B1237 or DTC indicator N and AUTO:
A Short in the Passenger's Air Mix Control Motor Circuit
1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Do the self-diagnostic function with the HDS or the climate control unit.
4. Check for DTCs.
Is DTC B1237 or N and AUTO indicated?
YES -
Go to step 5.
NO -
Intermittent failure, check for loose wires or poor connections in the passenger's air mix control motor circuit.?
5. Check for DTCs.
Are these DTCs also present; B1234 or K and AUTO, and/or B1245 or G, and/or B2968 or A and WINDSHIELD DEFROST, and/or B2980 or B
and WINDSHIELD DEFROST?
