DTC B1726: Display Panel Control Unit Lost Communication with the Climate Control Unit
- Clear the DTC by turning the ignition switch OFF, and then ON (II).
- Operate the climate control system in several modes.
- Check for DTCs using the self-diagnostic or HDS.
Is DTC B1726 indicated?
- YES - Go to step 4.
- NO - Intermittent failure.
- Turn the ignition switch OFF.
- Disconnect the display panel control unit connector B (6P).
- Disconnect the climate control unit connector A (20P).
- Check for continuity between the following terminals of display panel control unit connector B (6P) and climate control unit connector A (20P).TERMINAL SPECIFICATION
6P: 20P: No. 1 No. 4 No. 2 No. 13 No. 3 No. 2 No. 4 No. 12 No. 5 No. 11 Fig 1: Checking Continuity Between Following Terminals Of Display Panel Control Unit Connector B (6P) & Climate Control Unit Connector A (20P)Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
- YES - Go to step 8.
- NO - Repair any open in the wires between the display panel control unit and the climate control unit connector.
- Disconnect the driver's and passenger's air mix control motor connectors (5P).
- Check for continuity between the No. 20 terminal of climate control unit connector A (20P) and body ground.Fig 2: Checking Continuity Between No. 20 Terminal Of Climate Control Unit Connector A & Body Ground (20P)
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Is there continuity?
- YES - Repair short to body ground in the wire between the climate control unit and the driver's and passenger's air mix control motors.
- NO - Check for loose wires or poor connections at display panel control unit connector B (6P) and at climate control unit connector A (20P). If the connections are good, substitute a known-good display panel control unit and/or climate control unit, and recheck. If the symptom/indication goes away, replace the original display panel control unit and/or climate control unit.