B0223
DTC B0223
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle Diagnostic System Check - Vehicle prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions Diagnostic Procedure Instructions provides an overview of each diagnostic category.
DTC Descriptor
DTC B0223 01
- Recirculate Position Command 1 Circuit Short to Battery
DTC B0223 02
- Recirculate Position Command 1 Circuit Short to Ground
DTC B0223 04
- Recirculate Position Command 1 Circuit Open
Diagnostic Fault Information
Circuit/System Description
The air inlet actuator is a 2-wire bi-directional electric motor. There are two control circuits that enable the actuator to operate. The control circuits use either a 0 or 12-volt value to coordinate the actuator movement. When the actuator is at rest, both control circuits have a value of 0 volts. In order to move the actuator, the HVAC control module grounds one of the control circuits while providing the other with 12 volts. The HVAC control module reverses the polarity of the control circuits to move the actuator in the opposite direction.
Conditions for Running the DTC
Ignition ON
Conditions for Setting the DTC
B0223 01
The HVAC control module detects a short to battery in either air inlet control circuit.
B0223 02
The HVAC control module detects a short to ground in either air inlet control circuit.
B0223 04
The HVAC control module detects an open in an either inlet control circuit.
Action Taken When the DTC Sets
The air inlet door will be inoperative.
Conditions for Clearing the DTC
The condition for setting the DTC is no longer present.
Reference Information
Schematic Reference
HVAC Schematics Electrical Diagrams
Connector End View Reference
Component Connector End Views Fuel Pump and Level Sensor Assembly
Description and Operation
Manual HVAC Description and Operation HVAC - Manual
Electrical Information Reference
* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs
Scan Tool Reference
Control Module References Control Module References for scan tool information
Circuit/System Verification
1. Ignition ON.
2. Verify the M4 air inlet door actuator moves between the RECIRCULATE and FRESH AIR position within 15 seconds when pressing the recirculation switch.
• If the M4 air inlet door actuator does not move between the RECIRCULATE and FRESH AIR position
Refer to Circuit/System Testing
• If the M4 air inlet door actuator moves between the RECIRCULATE and FRESH AIR position
3. All OK.
Circuit/System Testing
1. Ignition OFF and all vehicle systems OFF, disconnect the harness connector at the M4 air inlet door actuator. It may take up to 2 minutes for all vehicle systems to power down.
2. Test for less than 100 ohms between the control circuit terminal A and ground.
• If 100 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K33 HVAC control module.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K33 HVAC control module.
• If less than 100 ohms
3. Test for less than 100 ohms between the control circuit terminal B and ground.
• If 100 ohms or greater
1. Ignition OFF, disconnect the harness connector at the K33 HVAC control module.
2. Test for less than 2 ohms in the control circuit end to end.
• If 2 ohms or greater, repair the open/high resistance in the circuit.
• If less than 2 ohms, replace the K33 HVAC control module.
• If less than 100 ohms
4. Connect a test lamp between control circuit terminal A and control circuit terminal B, ignition ON.
5. Verify the test lamp illuminates when commanding the RECIRCULATE and FRESH AIR positions using the recirculate switch.
• If the test lamp does not illuminate during either of the commands
1. Ignition OFF, disconnect the harness connector at the K33 HVAC control module.
2. Test for less than 1 V between each control circuit and ground.
• If less than 1 V, repair the short to voltage on the circuit.
• If 1 V or greater
3. Test for infinite resistance between each control circuit and ground.
• If less than infinite resistance, repair the short to ground on the circuit.
• If infinite resistance, replace the K33 HVAC control module.
• If the test lamp illuminates during each of the commands
6. Test or replace the M4 air inlet door actuator.
Repair Instructions
Perform the Diagnostic Repair Verification Verification Tests after completing the repair.
* Air Inlet Valve Actuator Replacement (LHD) Air Inlet Valve Actuator Replacement (LHD)
* Control Module References Control Module References for HVAC control module replacement, programming, and setup