DTC B1236 or DTC indicator M and AUTO: An Open in the Passenger's Air Mix Control Motor Circuit
- Clear the DTCs with the HDS.
- Turn the ignition switch to LOCK (0) and then back to ON (II).
- Do the self-diagnostic function with the HDS (see HOW TO USE THE SELF-DIAGNOSTIC FUNCTION WITH THE HDS ) or the climate control unit (see HOW TO USE THE SELF-DIAGNOSTIC FUNCTION WITHOUT THE HDS ).
- Check for DTCs.
Is DTC B1236 or M 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.
- Turn the ignition switch to LOCK (0).
- Test the passenger's air mix control motor (see PASSENGER'S AIR MIX CONTROL MOTOR TEST
).
Is the passenger's air mix control motor OK?
YES -Go to step 7.
NO -Replace the passenger's air mix control motor (see DRIVER'S AIR MIX CONTROL MOTOR REPLACEMENT ).
- Disconnect the passenger's air mix control motor 7P connector.
- Disconnect climate control unit connector A (40P).
- Check for continuity between the following terminals of climate control unit connector A (40P) and the passenger's air mix control motor 7P connector.
40P
No. 6
No. 8
No. 30
7P:
No. 7
No. 5
No. 3
Fig 1: Checking For Continuity Between Following Terminals Of Climate Control Unit Connector A (40P) And Passenger's Air Mix Control Motor 7P ConnectorCourtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
YES -Check for loose wires or poor connections at climate control unit connector A (40P) and at the passenger's air mix control motor 7P 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 CLIMATE CONTROL UNIT REMOVAL/INSTALLATION ).
NO -Repair an open in the wire(s) between the climate control unit and the passenger's air mix control motor.