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Pinpoint Test P: Temperature Control is Inoperative/Does Not Operate Correctly




Climate Control System

Pinpoint Test P: Temperature Control is Inoperative/Does Not Operate Correctly

Refer to Wiring Diagram Set 55 (Fusion/Milan/MKZ, Fusion Hybrid, Milan Hybrid, MKZ Hybrid), Automatic Climate Control System for schematic and connector information. Diagrams By Number

Normal Operation

Under normal operation, to rotate the temperature blend door actuator clockwise, the HVAC module supplies voltage to the temperature blend door actuators through the door actuator feed A circuits, and supplies ground through the door actuator feed B circuits. To rotate the temperature blend door actuator counterclockwise, the HVAC module reverses the voltage and ground circuits.

The temperature blend door actuator feedback resistors are supplied a ground from the HVAC module by the temperature blend door actuator return circuits and a 5-volt reference voltage on the temperature blend door actuator reference circuits. The HVAC module reads the voltage on the temperature blend door actuator feedback circuits to determine the temperature blend door actuator position by the position of the actuator feedback resistor wiper arm.

NOTE: For the passenger side temperature setting on hybrid vehicles equipped with dual-zone Electronic Automatic Temperature Control (EATC) and a Front Controls Interface Module (FCIM) built on or after 04/08/2009 to be functional, a passenger must be seated in the front passenger seat. If the front passenger seat is not occupied, the HVAC module will control the system based only on the driver side temperature setting. The HVAC module receives a Medium Speed Controller Area Network (MS-CAN) signal from the FCIM to indicate if the front passenger seat is occupied.

Door actuator feed A circuits
- LH blend - CH238 (YE/OG)
- RH blend - CH212 (BU/OG)

Door actuator feed B circuits
- LH blend - CH239 (BU/WH)
- RH blend - CH213 (BN/GN)

Door actuator return circuits
- LH blend - RH111 (GY/BU)
- RH blend - RH111 (GY/BU)

Door actuator reference circuits
- LH blend - LH111 (BN/WH)
- RH blend - LH111 (BN/WH)

Door actuator feedback circuits
- LH blend - VH440 (BU/BN)
- RH blend - VH411 (VT/GN)





This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- Temperature blend door actuator
- HVAC module
- Stuck or bound linkage or door


PINPOINT TEST P: TEMPERATURE CONTROL IS INOPERATIVE/DOES NOT OPERATE CORRECTLY

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P1 CHECK THE HVAC MODULE FOR DTCs

- Ignition ON.
- Check the HVAC module for DTCs.
- Are any DTCs present?

Yes
For DTC B1081:07 or B1082:07, INSPECT for binding/damaged linkage or door. REPAIR as necessary. If no condition is found, INSTALL a new door actuator. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

For DTC B1081:12 or B1082:12, GO to P2.

For DTC B1081:13 or B1082:13, GO to P3.

For DTC B1081:11 or B1082:11, GO to P4.

For DTC B11E5:15 or B11E6:15, GO to P6.

For DTC B11E5:11 or B11E6:11, GO to P10.

No
INSPECT for broken linkage or door. REPAIR as necessary. If no condition is found, GO to P13.

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P2 CHECK THE ACTUATOR MOTOR DRIVE CIRCUITS FOR A SHORT TO POWER

- Ignition OFF.
- Disconnect: HVAC Module - EMTC C2357a.
- Disconnect: HVAC Module - Dual Automatic Temperature Control (DATC) C2356a.
- Disconnect: HVAC Module - DATC C2356b.
- Ignition ON.
- Measure the voltage between ground and:
- For DTC B1081:12, HVAC module - EMTC C2357a-22 or HVAC module - DATC C2356a-22, circuit CH238 (YE/OG), harness side.
- For DTC B1082:12, HVAC module - DATC C2356b-26, circuit CH212 (BU/OG), harness side.




- Measure the voltage between ground and:
- For DTC B1081:12, HVAC module - EMTC C2357a-21 or HVAC module - DATC C2356a-21, circuit CH239 (BU/WH), harness side.
- For DTC B1082:12, HVAC module - DATC C2356b-25, circuit CH213 (BN/GN), harness side.




- Are any voltages present?

Yes
REPAIR the circuit(s) for a short to power. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

No
GO to P5.

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P3 CHECK THE ACTUATOR MOTOR DRIVE CIRCUITS FOR AN OPEN

NOTE: Due to limited connector accessibility, before carrying out this test step, visually inspect the wiring between the HVAC module and actuator for opens or shorts. If no damage is visually evident, proceed with the test.

- Ignition OFF.
- Disconnect: HVAC Module - EMTC C2357a.
- Disconnect: HVAC Module - DATC C2356a.
- Disconnect: HVAC Module - DATC C2356b.
- Disconnect: For DTC B1081:00, LH Temperature Blend Door Actuator C2091.
- Disconnect: For DTC B1082:00, RH Temperature Blend Door Actuator C2092 .
- Measure the resistance between:
- For DTC B1081:00, HVAC module - EMTC C2357a-22 or HVAC module - DATC C2356a-22, circuit CH238 (YE/OG), harness side and LH temperature blend door actuator C2091-5, circuit CH238 (YE/OG), harness side.
- For DTC B1082:00, HVAC module - DATC C2356b-26, circuit CH212 (BU/OG), harness side and RH temperature blend door actuator C2092-5, circuit CH212 (BU/OG), harness side.




- Measure the resistance between:
- For DTC B1081:00, HVAC module - EMTC C2357a-21 or HVAC module - DATC C2356a-21, circuit CH239 (BU/WH), harness side and LH temperature blend door actuator C2091-6, circuit CH239 (BU/WH), harness side.
- For DTC B1082:00, HVAC module - DATC C2356b-25, circuit CH213 (BN/GN), harness side and RH temperature blend door actuator C2092-6, circuit CH213 (BN/GN), harness side.




- Are the resistances less than 5 ohms?

Yes
GO to P13.

No
REPAIR the circuit(s) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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P4 CHECK THE ACTUATOR MOTOR DRIVE CIRCUITS FOR A SHORT TO GROUND

- Ignition OFF.
- Disconnect: HVAC Module - EMTC C2357a.
- Disconnect: HVAC Module - DATC C2356a.
- Disconnect: HVAC Module - DATC C2356b.
- Measure the resistance between ground and:
- For DTC B1081:11, HVAC module - EMTC C2357a-22 or HVAC module - DATC C2356a-22, circuit CH238 (YE/OG), harness side.
- For DTC B1082:11, HVAC module - DATC C2356b-26, circuit CH212 (BU/OG), harness side.




- Measure the resistance between ground and:
- For DTC B1081:11, HVAC module - EMTC C2357a-21 or HVAC module - DATC C2356a-21, circuit CH239 (BU/WH), harness side.
- For DTC B1082:11, HVAC module - DATC C2356b-25, circuit CH213 (BN/GN), harness side.




- Are the resistances greater than 10,000 ohms?

Yes
GO to P5.

No
REPAIR the circuit(s) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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P5 CHECK THE ACTUATOR MOTOR DRIVE CIRCUITS FOR A SHORT TOGETHER

NOTE: Due to limited connector accessibility, before carrying out this test step, visually inspect the wiring between the HVAC module and actuator for opens or shorts. If no damage is visually evident, proceed with the test.

- Ignition OFF.
- Disconnect: For DTC B1081:11, LH Temperature Blend Door Actuator C2091.
- Disconnect: For DTC B1082:11, RH Temperature Blend Door Actuator C2092 .

For DTC B1081:11.




- NOTE: For DTC B1081:11.
- Measure the resistance between HVAC module - EMTC C2357a-21 or HVAC module - DATC C2356a-21, circuit CH239 (BU/WH), harness side and HVAC module - EMTC C2357a-22 or HVAC module - DATC C2356a-22, circuit CH238 (YE/OG), harness side.

For DTC B1082:11.




- NOTE: For DTC B1082:11.
- Measure the resistance between HVAC module - DATC C2356b-25, circuit CH213 (BN/GN), harness side and HVAC module - DATC C2356b-26, circuit CH212 (BU/OG), harness side.
- Is the resistance greater than 10,000 ohms?

Yes
GO to P13.

No
REPAIR circuit(s) for a short together. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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P6 CHECK CIRCUIT VH441 (WH/BN) OR VH440 (BU/BN) FOR AN OPEN

NOTE: Due to limited connector accessibility, before carrying out this test step, visually inspect the wiring between the HVAC module and actuator for opens or shorts. If no damage is visually evident, proceed with the test.

- Ignition OFF.
- Disconnect: HVAC Module - EMTC C2357a.
- Disconnect: HVAC Module - DATC C2356a.
- Disconnect: HVAC Module - DATC C2356b.
- Disconnect: For DTC B11E5:15, LH Temperature Blend Door Actuator C2091.
- Disconnect: For DTC B11E6:15, RH Temperature Blend Door Actuator C2092 .
- Measure the resistance between the following:
- For DTC B11E5:15, HVAC module - EMTC C2357a-7 or HVAC module - DATC C2356a-7, circuit VH440 (BU/BN), harness side and LH temperature blend door actuator C2091-9, circuit VH440 (BU/BN), harness side.
- For DTC B11E6:15, HVAC module - DATC C2356b-16, circuit VH441 (WH/BN), harness side and RH temperature blend door actuator C2092-9, circuit VH441 (WH/BN), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to P7.

No
REPAIR circuit VH441 (WH/BN) or VH440 (BU/BN) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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P7 CHECK CIRCUIT VH440 (BU/BN) OR VH441 (WH/BN) FOR A SHORT TO POWER

- Ignition ON.
- Measure the voltage between ground and the following:
- For DTC B11E5:15, HVAC module - EMTC C2357a-7 or HVAC module - DATC C2356a-7, circuit VH440 (BU/BN), harness side.
- For DTC B11E6:15, HVAC module - DATC C2356b-16, circuit VH441 (WH/BN), harness side.




- Is any voltage present?

Yes
REPAIR circuits VH441 (WH/BN) or VH440 (BU/BN) for a short to power. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

No
GO to P8.

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P8 CHECK CIRCUIT LH111 (BN/WH) FOR A SHORT TO CIRCUIT VH441 (WH/BN) OR VH440 (BU/BN)

- Ignition OFF.
- Measure the resistance between HVAC module - EMTC C2357a-11 or HVAC module - DATC C2356a-11, circuit LH111 (BN/WH) and the following:
- For DTC B11E5:15, HVAC module - EMTC C2357a-7 or HVAC module - DATC C2356a-7, circuit VH440 (BU/BN), harness side.
- For DTC B11E6:15, HVAC module - DATC C2356b-16, circuit VH441 (WH/BN), harness side.




- Is the resistance greater than 10,000 ohms?

Yes
GO to P9.

No
REPAIR circuits LH111 (BN/WH) and VH441 (WH/BN) or VH440 (BU/BN) for a short together. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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P9 CHECK THE ACTUATOR RETURN CIRCUIT RH111 (GY/BU) FOR AN OPEN

- Measure the resistance between HVAC module - EMTC C2357a-10 or HVAC module - DATC C2356a-10, circuit RH111 (GY/BU) and the following:
- For DTC B11E5:15, LH temperature blend door actuator C2091-8, circuit RH111 (GY/BU), harness side.
- For DTC B11E6:15, RH temperature blend door actuator C2092-8, circuit RH111 (GY/BU), harness side.




- Is the resistance less than 5 ohms?

Yes
GO to P13.

No
REPAIR circuit RH111 (GY/BU) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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P10 CHECK CIRCUIT VH440 (BU/BN) OR VH441 (WH/BN) FOR A SHORT TO GROUND

- Ignition OFF.
- Disconnect: HVAC Module - EMTC C2357a.
- Disconnect: HVAC Module - DATC C2356a.
- Disconnect: HVAC Module - DATC C2356b.
- Measure the resistance between ground and the following:
- For DTC B11E5:11, HVAC module - EMTC C2357a-7 or HVAC module - DATC C2356a-7, circuit VH440 (BU/BN), harness side.
- For DTC B11E6:11, HVAC module - DATC C2356b-16, circuit VH441 (WH/BN), harness side.




- Are the resistances greater than 10,000 ohms?

Yes
GO to P11.

No
REPAIR circuit VH441 (WH/BN) or VH440 (BU/BN) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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P11 CHECK CIRCUIT RH111 (GY/BU) FOR A SHORT TO CIRCUIT VH441 (WH/BN) OR VH440 (BU/BN)

NOTE: Due to limited connector accessibility, before carrying out this test step, visually inspect the wiring between the HVAC module and actuator for opens or shorts. If no damage is visually evident, proceed with the test.

- Disconnect: For DTC B11E5:11, LH Temperature Blend Door Actuator C2091.
- Disconnect: For DTC B11E6:11, RH Temperature Blend Door Actuator C2092 .
- Measure the resistance between HVAC module - EMTC C2357a-10 or HVAC module - DATC C2356a-10, circuit RH111 (GY/BU) and the following:
- For DTC B11E5:11, HVAC module - EMTC C2357a-7 or HVAC module - DATC C2356a-7, circuit VH440 (BU/BN), harness side.
- For DTC B11E6:11, HVAC module - DATC C2356b-16, circuit VH441 (WH/BN), harness side.




- Is the resistance greater than 10,000 ohms?

Yes
GO to P12.

No
REPAIR circuits RH111 (GY/BU) and VH441 (WH/BN) or VH440 (BU/BN) for a short together. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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P12 CHECK CIRCUIT LH111 (BN/WH) FOR AN OPEN

- Measure the resistance between HVAC module - EMTC C2357a-11 or HVAC module - DATC C2356a-11, circuit LH111 (BN/WH) and the following:
- For DTC B11E5:11, LH temperature blend door actuator C2091-10, circuit LH111 (BN/WH), harness side.
- For DTC B11E6:11, RH temperature blend door actuator C2092-10, circuit LH111 (BN/WH), harness side.




- Are the resistances less than 5 ohms?

Yes
GO to P13.

No
REPAIR circuit LH111 (BN/WH) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

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P13 CHECK THE ACTUATOR CONNECTION

- Disconnect the actuator connector.
- Check for:

- corrosion.
- pushed-out terminals.
- damaged terminals.
- Connect and correctly seat the actuator connector.
- Clear the DTCs.
- Operate the system and verify the concern is still present.
- Is the concern still present?

Yes
CARRY OUT the Temperature Blend Door Actuator component test. If the actuator tests OK, GO to P14. Component Tests

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. TEST the system for normal operation.

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P14 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. To carry out the calibration, follow the steps below.

- Ignition OFF.
- Inspect the module connectors for:

- corrosion.
- pushed-out terminals.
- damaged terminals.
- Connect and correctly seat all the HVAC module connectors.
- Ignition ON.
- Clear the DTCs.
- Select any position except OFF.
- NOTE: The HVAC module will now initialize and calibrate 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
INSTALL a new HVAC module. TEST the system for normal operation.

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.

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