Pinpoint Test

NOTE: The temperature blend door actuator connector in the pinpoint test is difficult to access. Before disconnecting the temperature blend door actuator, visually inspect the actuator and its harness for obvious damage. If no damage is evident, proceed with the test.

CHECK THE HVAC MODULE FOR DTCs
1. Ignition ON.
2. Using a scan tool, perform a HVAC module self-test.
  Are any DTCs present?
  - Yes: For DTC B1081:11, GO to 3.
    For DTC B1081:12, GO to 4.
    
    For DTC B1081:13, GO to 5.
    
    For DTC B11E5:11, GO to 7.
    
    For DTC B11E5:15, GO to 9.
  - No : GO to 2 .
CHECK THE TEMPERATURE BLEND DOOR ACTUATOR OPERATION USING ACTIVE COMMANDS
1. Start the engine.
2. Run the engine until it reaches normal operating temperature.
3. Using a scan tool, view HVAC module PIDs .
4. Select panel mode on the HVAC controls.
5. Select the highest blower motor setting.
6. Monitor airflow while using the scan tool to operate the HVAC module active command LEFT_BLEND, increasing and decreasing the percentage value.
  Does the airflow temperature change between warm and cold when the active command is changed?
  - Yes : INSTALL a new FCIM.
    REFER to FRONT CONTROLS INTERFACE MODULE (FCIM) - (Premium),
    
    REFER to FRONT CONTROLS INTERFACE MODULE (FCIM) - (Premium Plus), or
    
    REFER to FRONT CONTROLS INTERFACE MODULE (FCIM) - (Sony® Sound).
  - No : INSPECT for broken linkage or door. REPAIR as necessary. If no condition is found, GO to 14.

CHECK THE TEMPERATURE BLEND DOOR ACTUATOR MOTOR CIRCUITS FOR A SHORT TO GROUND

Ignition OFF.
Disconnect: Temperature Blend Door Actuator.
Disconnect: HVAC Module C228A.

Measure:

HVAC Module			Ground

C228A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
8	CH238 (YE/OG)		-	Ground
9	CH239 (BU/WH)		-	Ground

Are the resistances greater than 10, 000 ohms?

Yes: GO to 6.
No : REPAIR the circuit in question.

CHECK THE TEMPERATURE BLEND DOOR ACTUATOR MOTOR CIRCUITS FOR A SHORT TO VOLTAGE

Ignition OFF.
Disconnect: Temperature Blend Door Actuator.
Disconnect: HVAC Module C228A.
Ignition ON.

Measure:

HVAC Module			Ground

C228A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
8	CH238 (YE/OG)		-	Ground
9	CH239 (BU/WH)		-	Ground

Is any voltage present?

Yes: REPAIR the circuit in question.
No : GO to 6.

CHECK THE TEMPERATURE BLEND DOOR ACTUATOR MOTOR CIRCUITS FOR AN OPEN

Ignition OFF.
Disconnect: HVAC Module C228A.
Disconnect: Temperature Blend Door Actuator.

Measure:

HVAC Module			Temperature Blend Door Actuator

C228A			C2091
Pin	Circuit	Measurement / Action	Pin	Circuit
8	CH238 (YE/OG)		6	CH238 (YE/OG)
9	CH239 (BU/WH)		5	CH239 (BU/WH)

Are the resistances less than 3 ohms?

Yes: GO to 14.
No : REPAIR the circuit in question.

CHECK THE TEMPERATURE BLEND DOOR ACTUATOR MOTOR CIRCUITS FOR A SHORT TOGETHER

Ignition OFF.

Measure:

HVAC Module			HVAC Module

C228A			C228A
Pin	Circuit	Measurement / Action	Pin	Circuit
8	CH238 (YE/OG)		9	CH239 (BU/WH)

Is the resistance greater than 10, 000 ohms?

Yes: GO to 14.
No : REPAIR the circuit.

CHECK THE TEMPERATURE BLEND DOOR ACTUATOR FEEDBACK CIRCUIT FOR A SHORT TO GROUND

Ignition OFF.
Disconnect: HVAC Module C228A.
Disconnect: Temperature Blend Door Actuator.

Measure:

HVAC Module			Ground

C228A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
20	VH440 (BU/BN)		-	Ground

Is the resistance greater than 10, 000 ohms?

Yes: GO to 8 .
No : REPAIR the circuit.

CHECK THE SIGNAL RETURN CIRCUIT FOR A SHORT TO THE TEMPERATURE BLEND DOOR ACTUATOR FEEDBACK CIRCUIT

Measure:

HVAC Module			HVAC Module

C228A			C228A
Pin	Circuit	Measurement / Action	Pin	Circuit
23	RH111 (GY/BU)		20	VH440 (BU/BN)

Is the resistance greater than 10, 000 ohms?

Yes: GO to 14.
No : REPAIR the circuits.

CHECK THE TEMPERATURE BLEND DOOR ACTUATOR FEEDBACK CIRCUIT FOR A SHORT TO VOLTAGE

Ignition OFF.
Disconnect: HVAC Module C228A.
Disconnect: Temperature Blend Door Actuator.
Ignition ON.

Measure:

HVAC Module			Ground

C228A			Ground
Pin	Circuit	Measurement / Action	Pin	Circuit
20	VH440 (BU/BN)		-	Ground

Is any voltage present?

Yes: REPAIR the circuits.
No : GO to 10 .

CHECK THE REFERENCE VOLTAGE CIRCUIT FOR AN OPEN

Ignition OFF.

Measure:

HVAC Module			Temperature Blend Door Actuator

C228A			C2091
Pin	Circuit	Measurement / Action	Pin	Circuit
24	LH111 (BN/WH)		3	LH111 (BN/WH)

Is the resistance less than 3 ohms?

Yes: GO to 11 .
No : REPAIR the circuit.

CHECK THE REFERENCE VOLTAGE CIRCUIT FOR A SHORT TO THE TEMPERATURE BLEND DOOR ACTUATOR FEEDBACK CIRCUIT

Ignition OFF.

Measure:

HVAC Module			HVAC Module

C228A			C228A
Pin	Circuit	Measurement / Action	Pin	Circuit
24	LH111 (BN/WH)		20	VH440 (BU/BN)

Is the resistance greater than 10, 000 ohms?

Yes: GO to 12 .
No : REPAIR the circuits.

CHECK THE TEMPERATURE BLEND DOOR ACTUATOR FEEDBACK CIRCUIT FOR AN OPEN

Measure:

HVAC Module			Temperature Blend Door Actuator

C228A			C2091
Pin	Circuit	Measurement / Action	Pin	Circuit
20	VH440 (BU/BN)		2	VH440 (BU/BN)

Is the resistance less than 3 ohms?

Yes: GO to 13 .
No : REPAIR the circuit.

CHECK THE TEMPERATURE BLEND DOOR ACTUATOR RETURN SIGNAL RETURN CIRCUIT FOR AN OPEN

Measure:

HVAC Module			Temperature Blend Door Actuator

C228A			C2091
Pin	Circuit	Measurement / Action	Pin	Circuit
23	RH111 (GY/BU)		1	RH111 (GY/BU)

Is the resistance less than 3 ohms?

Yes: GO to 14 .
No : REPAIR the circuit.

CHECK FOR CORRECT TEMPERATURE BLEND DOOR ACTUATOR OPERATION
1. Disconnect and inspect the temperature blend door actuator connector.
2. 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
3. Reconnect the temperature blend door actuator connector. Make sure they seat and latch correctly.
4. Reconnect the HVAC module connectors. Make sure they seat and latch correctly.
5. Operate the system and determine if the concern is still present.
  Is the concern still present?
  - Yes: INSTALL a new Temperature Blend Door Actuator, REFER to Temperature Blend Door Actuator . TEST the system for normal operation. If the concern is still present, GO to 15 .
  - 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.
MODULE ACTUATOR POSITION CALIBRATION
NOTE: The purpose of the module actuator position calibration is to allow the HVAC module to reinitialize and calibrate the actuator stop points.
1. Ignition OFF.
2. Disconnect and inspect all HVAC module connectors.
3. 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
4. Reconnect the HVAC module connectors. Make sure they seat and latch correctly.
5. Clear the DTCs .
6. Using a scan tool, perform HVAC Module self-test.
7. Select any position except OFF.
8. NOTE: The HVAC module initializes and calibrates the actuators. Calibration of the actuators will take approximately 30 seconds.
  
  Operate the system and verify 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 now operating correctly at this time. The concern may have been caused by a foreign object in the HVAC case or temporary binding that restricted actuator door travel. CHECK any actuator external linkage. If condition recurs, INSPECT actuator linkage and door for binding and CHECK HVAC case for foreign objects.