Pinpoint Test C : C1B14:11, C1B14:12
- C1 CHECK THE HVAC MODULE DTCs
- Ignition ON.
- Review the recorded DTCs from the HVAC module self-test.
Is DTC C1B14:11 present?
Yes GO to C2. No GO to C5. - C2 CHECK THE REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO GROUND
- Ignition OFF.
- Disconnect: HVAC Module C228A.
- Disconnect: HVAC Module C228B.
- Disconnect: Auxiliary Climate Control Assembly.
- Measure:
Positive Lead Measurement / Action Negative Lead C228A-24 Ground
Is the resistance greater than 10, 000 ohms?
Yes GO to C3. No REPAIR the circuit. - C3 CHECK THE REFERENCE VOLTAGE CIRCUIT AND THE SIGNAL RETURN CIRCUIT FOR A SHORT TOGETHER
- Connect: Auxiliary Climate Control Assembly.
Is the resistance greater than 200 ohms?
Yes GO to C6. No GO to C4. - C4 CHECK THE ACTUATORS
- While measuring the resistance, disconnect the components one at a time, in order. Stop disconnecting components if the measured resistance rises above 200 ohms:
- Defrost/panel/floor door actuator
- LH temperature blend door actuator
- RH temperature blend door actuator
- Recirculation door actuator
- In-vehicle temperature/humidity sensor
- Auxiliary mode door actuator
- Auxiliary temperature blend door actuator
- Auxiliary climate control assembly
Did the resistance rise above 200 ohms?
Yes INSTALL a new component in question (the last one to be disconnected). No REPAIR the circuits. - While measuring the resistance, disconnect the components one at a time, in order. Stop disconnecting components if the measured resistance rises above 200 ohms:
- C5 CHECK THE REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO VOLTAGE
- Ignition OFF.
- Disconnect: HVAC Module C228A.
- Ignition ON.
- Measure:
Positive Lead Measurement / Action Negative Lead C228A-24 Ground
Is any voltage present?
Yes REPAIR the circuit. No GO to C6. - C6 CHECK FOR CORRECT HVAC MODULE OPERATION
- Ignition OFF.
- Disconnect and inspect all HVAC module connectors.
- Repair:
- corrosion (install new connector or terminals - clean module pins)
- damaged or bent pins - install new terminals/pins
- pushed-out pins - install new pins as necessary
- Reconnect the HVAC module connectors. Make sure they seat and latch correctly.
- Operate the system and determine if the concern is still present.
Is the concern still present?
Yes CHECK OASIS for any applicable TSBs. If a TSB exists for this concern, DISCONTINUE this test and FOLLOW TSB instructions. If no TSBs address this concern, INSTALL a new HVAC module. Refer to Heating Ventilation Air Conditioning (HVAC) Module . No The system is operating correctly at this time. The concern may have been caused by module connections. ADDRESS the root cause of any connector or pin issues.
