Steering Column: Overview Ford Edge I facelift

Normal Operation

When the steering column control switch (mounted directly to the Steering Column Control Module (SCCM)) is activated, the SCCM supplies voltage and ground to the applicable steering column tilt or telescoping motor to move the steering column to the desired position.

This pinpoint test is intended to diagnose the following

1. Fuse
2. Wiring, terminals or connectors
3. Steering column control switch
4. Adjustable steering column tilt motor
5. Steering column assembly
6. SCCM

Note. Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

Note. If the adjustable steering column only operates in one second intervals when activating the steering column control switch, GO to Pinpoint Test C .

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1. A1 CHECK THE OPERATION OF THE ADJUSTABLE COLUMN USING THE STEERING COLUMN CONTROL SWITCH Operate the adjustable steering column in all directions using the steering column control switch. Does the steering column operate correctly in at least one direction using the steering column control switch? YES : GO to A4 . No : If the steering column does not move at all in any directions using the steering column switch, GO to A2. If the steering column only moves in one second intervals (jog mode) in one or more directions using the steering column switch, GO to «Pinpoint Test C»(ref-494604-S09358572292012081400000) .
2. A2 CHECK FOR VOLTAGE AT THE SCCM Ignition OFF. Disconnect: SCCM C2414A. Disconnect: SCCM C2414B. Measure the voltage between SCCM C2414A-10, circuit SBP23 (WH/RD), harness side and ground. Measure the voltage between SCCM C2414B-8, circuit SBP24 (VT/RD), harness side and ground. Is the voltage greater than 10 volts? YES : GO to A3. No : VERIFY BCM fuses 23 (15A) and 24 (15A) are OK. If OK, REPAIR the affected circuit. If not OK, REFER to the appropriate SYSTEMS WIRING DIAGRAMS article to identify the cause for the circuit short. TEST the system for normal operation.
3. A3 CHECK THE SCCM GROUND CIRCUIT FOR AN OPEN Measure the resistance between SCCM C2414A-13, circuit GD115 (BK/GY), harness side and ground. Measure the resistance between SCCM C2414B-5, circuit GD115 (BK/GY), harness side and ground. Are the resistances less than 5 ohms? YES : GO to A4. No : REPAIR circuit GD115 (BK/GY). TEST the system for normal operation.
4. A4 CHECK THE STEERING COLUMN ADJUST SWITCH (STRCOL_ADJ) PID Connect: SCCM C2414A. Connect: SCCM C2414B. Ignition ON. Enter the following diagnostic mode on the scan tool: DataLogger - SCCM. Monitor the SCCM PID STRCOL_ADJ while moving the steering column control switch in all directions. Do the PID values agree with the steering column control switch positions? YES : GO to A5. No : INSTALL a new steering column control switch. REFER to «STEERING COLUMN SWITCHES»(ref-494582) . CLEAR the DTCs. VERIFY correct system operation. REPEAT the self-test If the concern is still present, INSTALL a new Steering Column Control Module (SCCM). REFER to «STEERING COLUMN SWITCHES»(ref-494582) . TEST the system for normal operation.
5. A5 CHECK THE ADJUSTABLE STEERING COLUMN MOTOR CIRCUITS FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect: SCCM C2414B. Disconnect: SCCM C2414C. Ignition ON. Measure the voltage between ground and: SCCM C2414B-1, circuit CPP22 (GY/BN), harness side. SCCM C2414B-2, circuit CPP04 (GY), harness side. SCCM C2414B-7, circuit CPP02 (BN), harness side. Is any voltage present? YES : REPAIR the affected circuit(s). TEST the system for normal operation. No : GO to A6.
6. A6 CHECK THE ADJUSTABLE STEERING COLUMN MOTOR CIRCUITS FOR A SHORT TO GROUND Ignition OFF. Measure the resistance between ground and: SCCM C2414B-1, circuit CPP22 (GY/BN), harness side. SCCM C2414B-2, circuit CPP04 (GY), harness side. SCCM C2414B-7, circuit CPP02 (BN), harness side. Are the resistances greater than 10, 000 ohms? YES : GO to A7. No : REPAIR the affected circuit(s). TEST the system for normal operation.
7. A7 CHECK THE ADJUSTABLE STEERING COLUMN MOTOR CIRCUITS FOR AN OPEN Disconnect: Adjustable Steering Column Tilt Motor C2600 or Adjustable Steering Column Telescope Motor C2601. For an inoperative adjustable steering column tilt motor, measure the resistance between SCCM C2414B and adjustable steering column tilt motor C2600 using the following chart: SCCM Circuit Adjustable Steering Column Tilt Motor C2414B-7 CPP02 (BN) C2600-1 C2414B-2 CPP04 (GY) C2600-2 For an inoperative adjustable steering column telescope motor, measure the resistance between SCCM C2414B and adjustable steering column telescope motor C2601 using the following chart: SCCM Circuit Adjustable Steering Column Telescope Motor C2414B-7 CPP02 (BN) C2601-3 C2414B-1 CPP22 (GY/BN) C2601-1 Is the resistance less than 5 ohms? YES : For a tilt motor that is inoperative/does not operate correctly, GO to A8. For a telescope motor that is inoperative/does not operate correctly, GO to A9 . No : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
8. A8 CHECK THE SCCM OUTPUT TO THE ADJUSTABLE STEERING COLUMN TILT MOTOR Ignition OFF. Connect: SCCM C2414B. Connect: SCCM C2414C. NOTE: The following step uses a test light to simulate normal circuit loads. Use only the test light recommended in the Special Tools table at the beginning of this service information. To avoid connector terminal damage, use the Flex Probe Kit for the test light probe connection to the vehicle. Do not use the test light probe directly on any connector. Connect a 12-volt incandescent test light between adjustable steering column tilt motor C2600-1, circuit CPP02 (BN), harness side and C2600-2, circuit CPP04 (GY), harness side. Ignition ON. NOTE: Because the steering column motor (Hall-effect sensor) is disconnected, the SCCM only activates the output for approximately 1 second each time the steering column control switch is activated (jog mode). Activate the steering column control switch in both the UP and DOWN positions (release the switch briefly between each switch activation) while observing the test light. Does the test light momentarily illuminate when the steering column control switch is activated in both UP and DOWN positions? YES : INSTALL a new adjustable steering column tilt motor. REFER to «Steering Column Motor - Tilt»(ref-494604-S14962466892012081400000) in this service information. CLEAR the DTCs. TEST the system for normal operation. REPEAT the self test. No : GO to A10 .
9. A9 CHECK THE SCCM OUTPUT TO THE ADJUSTABLE STEERING COLUMN TELESCOPE MOTOR Ignition OFF. Connect: SCCM C2414B. Connect: SCCM C2414C. NOTE: The following step uses a test light to simulate normal circuit loads. Use only the test light recommended in the Special Tools table at the beginning of this service information. To avoid connector terminal damage, use the Flex Probe Kit for the test light probe connection to the vehicle. Do not use the test light probe directly on any connector. Connect a 12-volt incandescent test light between adjustable steering column telescope motor C2601-3, circuit CPP02 (BN), harness side and C2601-1, circuit CPP22 (GY/BN), harness side. Ignition ON. NOTE: Because the steering column motor (Hall-effect sensor) is disconnected, the SCCM only activates the output for approximately 1 second each time the steering column control switch is activated (jog mode). Activate the steering column control switch in both the FORWARD and REARWARD positions (release the switch briefly between each switch activation) while observing the test light. Does the test light momentarily illuminate when the steering column control switch is activated in both FORWARD and REARWARD positions? YES : INSTALL a new steering column assembly. REFER to «Steering Column»(ref-494604-S24867447482012081400000) in this service information. CLEAR the DTCs. TEST the system for normal operation. REPEAT the self test. No : GO to A10.
10. A10 CHECK THE SCCM CONNECTORS Check the SCCM electrical connectors for: corrosion damaged pins pushed-out pins Connect: Reconnect all previously disconnected electrical connectors. Make sure the connectors are seated correctly then operate the system and verify the concern is still present. Is the concern still present? YES : INSTALL a new SCCM. REFER to «STEERING COLUMN SWITCHES»(ref-494582) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

Refer to OEM WIRING DIAGRAMS - ADJUSTABLE STEERING COLUMN for schematic and connector information.

When the desired memory position is selected using the memory SET switch or an RKE transmitter, the Driver Seat Module (DSM) communicates the desired steering column position in a message on the Medium Speed Controller Area Network (MS-CAN) to the Body Control Module (BCM). The BCM acts as a gateway module, relaying the message to the Steering Column Control Module (SCCM) over the High Speed Controller Area Network (HS-CAN). The SCCM monitors the position of the adjustable steering column using Hall-effect type rotation sensors that are integral to the tilt and telescoping motors. The sensors provide a digital signal used by the SCCM to calculate the position of the steering column in relation to the full forward/rearward and full up/down positions. The SCCM uses these signals to store and recall memory positions, carry out Easy Entry/Exit operations and to make sure the tilt and telescope motors do not stall against the steering column end of travel. If a tilt or telescope motor sensor DTC sets, the SCCM does not recall a programmed memory position or automatically position the steering column during the easy entry/exit operation. If a DTC sets for either sensor, the affected adjustable steering column motor operates in jog mode. Jog mode allows limited operation of the affected steering column motor using only the steering column control switch. When the steering column control switch is operated in jog mode, the steering column moves in the desired direction for one second, then stops. The steering column control switch must be released, then pressed again in order to move the steering column for an additional second.

This pinpoint test is intended to diagnose the following

1. Entry/exit feature is disabled in the message center
2. Wiring, terminals or connectors
3. Memory SET switch
4. Remote Keyless Entry (RKE) transmitter
5. DSM
6. BCM
7. SCCM

Note. Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

1. B1 CHECK THE OPERATION OF THE ADJUSTABLE COLUMN USING THE STEERING COLUMN CONTROL SWITCH Operate the adjustable steering column in all directions using the steering column control switch. Does the steering column move for more than one second in each direction using the steering column control switch? YES : If the adjustable steering column is inoperative using the easy entry/exit feature, GO to B2. If the adjustable steering column is inoperative using the memory SET switch, GO to B3 . If the adjustable steering column is inoperative using an RKE transmitter, GO to B4 . No : If the steering column does not move at all in one or more directions using the steering column switch, GO to «Pinpoint Test A»(ref-494604-S35333653162012081400000) . If the steering column only moves in one second intervals (jog mode) in one or more directions using the steering column switch, GO to «Pinpoint Test C»(ref-494604-S09358572292012081400000) .
2. B2 VERIFY THE EASY ENTRY/EXIT FEATURE IS ENABLED Verify the easy entry/exit feature is enabled using the message center. Refer to the Owner's Literature for additional instructions for using the message center. Does the message center indicate that the easy entry/exit feature is enabled? YES : GO to B5 . No : TOGGLE the easy entry/exit feature on using the message center controls. TEST the system for normal operation.
3. B3 CHECK THE OPERATION OF THE MEMORY SEATS, MEMORY MIRRORS AND STEERING COLUMN USING THE MEMORY SET SWITCH Check the operation of the seats, memory mirrors and steering column using the memory SET switch. Refer to the Owner's Literature for additional instructions for programming a memory position. Do the seats and mirrors operate properly using the memory SET switch? YES : If only the adjustable steering column is inoperative using the memory SET switch, GO to B5 . No : If the seats and mirrors are also inoperative using the memory SET switch, REFER to «SEATING»(ref-494596) .
4. B4 CHECK THE OPERATION OF THE MEMORY SEATS, MIRRORS AND STEERING COLUMN USING AN RKE TRANSMITTER Check the operation of the seats, mirrors and steering column using an RKE transmitter. Refer to the Owner's Literature for additional instructions for programming a memory position to an RKE transmitter. Do the seats and mirrors operate properly using an RKE transmitter? YES : If only the adjustable steering column is inoperative using an RKE transmitter, GO to B5. No : If the seats and mirrors are also inoperative using an RKE transmitter, REFER to «SEATING»(ref-494596) .
5. B5 CHECK FOR DSM, BCM OR SCCM DTCs Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test - DSM. Enter the following diagnostic mode on the scan tool: Self Test - BCM. Enter the following diagnostic mode on the scan tool: Self-Test - SCCM. Record any DTCs retrieved from the DSM, BCM and SCCM. Are any symptom or communication related DTCs present? YES : To diagnose the DSM DTCs, REFER to «SEATING»(ref-494596) . To diagnose the BCM DTCs, REFER to «MULTIFUNCTION ELECTRONIC MODULES»(ref-494579) . To diagnose the SCCM DTCs, REFER to «STEERING COLUMN SWITCHES»(ref-494582) . No : INSTALL a new SCCM. REFER to «STEERING COLUMN SWITCHES»(ref-494582) . TEST the system for normal operation.

Refer to OEM WIRING DIAGRAMS - ADJUSTABLE STEERING COLUMN for schematic and connector information.

The SCCM monitors the position of the adjustable steering column using of Hall-effect type rotation sensors that are integral to the tilt and telescoping motors. The adjustable steering column tilt motor is serviced separately from the steering column. The adjustable steering column telescope motor is not serviceable. If a new adjustable steering column telescope motor sensor is needed, install a new steering column assembly.

The SCCM sends a reference voltage along the sensor feed circuit through the Hall-effect sensor and back to the SCCM through a shared signal return circuit. The sensors provide a digital signal used by the SCCM to calculate the position of the steering column in relation to the full forward/rearward and full up/down positions. The SCCM uses this signal to store and recall memory positions, to carry out the Easy Entry/Exit operations and to make sure the adjustable steering column tilt and telescope motors do not stall against the steering column end of travel.

If an adjustable steering column tilt or telescope motor sensor DTC sets (or if either of the sensor circuits become open), the SCCM does not recall a programmed memory position or automatically position the steering column during the easy entry/exit operations. The affected steering column motor operates in jog mode. Jog mode allows limited operation of the affected steering column motor using only the steering column control switch. When the steering column control switch is operated in jog mode, the steering column moves in the desired direction for one second, then stops regardless of the length of time the switch is actually activated. The steering column control switch must be released, then activated again in order to move the steering column for an additional second.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Adjustable steering column tilt motor
3. Steering column assembly
4. SCCM

Note. Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

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1. C1 CHECK THE TILT/TELESCOPE SENSOR CIRCUITS FOR A SHORT TO VOLTAGE Ignition OFF. Disconnect: SCCM C2414C. Disconnect: Adjustable Steering Column Tilt Motor C2600. Disconnect: Adjustable Steering Column Telescope Motor C2601. Ignition ON. Measure the voltage between ground and: SCCM C2414C-3, circuit RPP06 (GN), harness side. SCCM C2414C-4, circuit VPP08 (WH), harness side. SCCM C2414C-5, circuit VPP17 (VT/BN), harness side. Is any voltage present? YES : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test. No : GO to C2.
2. C2 CHECK THE TILT/TELESCOPE SENSOR CIRCUITS FOR A SHORT TO GROUND Ignition OFF. Measure the resistance between ground and: SCCM C2414C-3, circuit RPP06 (GN), harness side. SCCM C2414C-4, circuit VPP08 (WH), harness side. SCCM C2414C-5, circuit VPP17 (VT/BN), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to C3. No : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
3. C3 CHECK THE TILT/TELESCOPE SENSOR CIRCUITS FOR A SHORT TOGETHER Measure the resistance between SCCM C2414C-4, circuit VPP08 (WH), harness side and SCCM C2414C-5, circuit VPP17 (VT/BN), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to C4. No : REPAIR the affected circuit(s). CLEAR the DTCs. REPEAT the self-test.
4. C4 CHECK THE TILT/TELESCOPE SENSOR CIRCUITS FOR AN OPEN Measure the resistance between SCCM C2414C, harness side and adjustable steering column tilt motor C2600; and between SCCM C2414C, harness side and adjustable steering column telescope motor C2601, harness side using the following chart: SCCM Circuit Adjustable Steering Column Tilt/Telescope Motor C2414C-3 RPP06 (GN) C2600-3 C2414C-3 RPP06 (GN) C2601-4 C2414C-4 VPP08 (WH) C2600-4 C2414C-5 VPP17 (VT/BN) C2601-2 Are the resistances less than 5 ohms? YES : GO to C5. No : REPAIR the affected circuit(s). TEST the system for normal operation.
5. C5 CHECK THE SCCM CONNECTOR Check SCCM connector C2414C for: corrosion damaged pins pushed-out pins Connect: SCCM C2414C. Connect: Adjustable Steering Column Tilt Motor C2600. Connect: Adjustable Steering Column Telescope Motor C2601. Ignition ON. Make sure the connectors are seated correctly then operate the system and verify the concern is still present. Is the concern still present? YES : If the adjustable steering column does not operate correctly when the steering column control switch is in the UP/DOWN (tilt) position(s), INSTALL a new adjustable steering column tilt motor. REFER to «Steering Column Motor - Tilt»(ref-494604-S14962466892012081400000) in this service information. CLEAR the DTCs. REPEAT the self-test. If the concern is still present, INSTALL a new SCCM. REFER to «STEERING COLUMN SWITCHES»(ref-494582) . TEST the system for normal operation. If the adjustable steering column does not operate correctly when the steering column control switch is in the FORWARD/REARWARD (telescope) position(s), INSTALL a new steering column assembly. REFER to «Steering Column»(ref-494604-S24867447482012081400000) in this service information. CLEAR the DTCs. REPEAT the self-test. If the concern is still present, INSTALL a new SCCM. REFER to «STEERING COLUMN SWITCHES»(ref-494582) . TEST the system for normal operation. No : The system is operating correctly at this time. Concern may have been caused by a loose or corroded connector. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.

Heated Steering Wheel System Operation

When a heated steering wheel request is received, the Heated Steering Wheel Module (HSWM) applies voltage and ground to the steering wheel heating element (integral to the steering wheel). The steering wheel is heated to a temperature of approximately 28-34°C (82-94°F) and is maintained by the HSWM using a temperature sensor (integral to the steering wheel). The HSWM supplies a reference voltage and ground to the temperature sensor and monitors the voltage drop for controlling current flow to the heating element. The HSWM is designed to remain on, heating the steering wheel and maintaining temperature until switched OFF on the Front Display Interface Module (FDIM) or the ignition switch is turned OFF.

On all vehicles, slow heating between the 10 o'clock and 2 o'clock steering wheel hand positions is considered normal. On vehicles equipped with wood inserts in the steering wheel, there is no heating elements located under the inserts.

When steering wheel heat is requested, the Heated Steering Wheel Module (HSWM) applies voltage and ground to the steering wheel heating element (integral to the steering wheel). The steering wheel heating element will draw between 1 and 10A of current depending on steering wheel temperature. The steering wheel contains 3 heating elements wired in parallel and has a resistance of 1.6-2.6 ohms. If the steering wheel is equipped with wood inserts, the steering wheel contains 2 heating elements wired in parallel and has a resistance of 2.1-3.1 ohms. The heated steering wheel temperature is maintained by the HSWM using a sensor in the steering wheel (integral to the steering wheel). The HSWM is designed to remain on, heating the steering wheel and maintaining temperature until switched OFF on the Front Display Interface Module (FDIM) or the ignition is turned OFF.

1. DTC B135C: 11 (Heater Element: Circuit Short to Ground) - This DTC will only set when the heated steering wheel is commanded on. The module senses current greater than 10A on the steering wheel heating element output circuit for greater than 80ms, indicating a short to ground, this DTC sets. This DTC also sets when the steering wheel heating element output Field-Effect Transistor (FET) in the module has a thermal failure. The steering wheel heating element output will be disabled until the ignition is cycled.
2. DTC B135C: 15 (Heater Element: Circuit Short to Battery or Open) - This DTC will only set when the heated steering wheel is commanded on. The module senses current less than 1A on the steering wheel heating element output circuit for more than 80ms, indicating a short to voltage or an open circuit or heating element. The steering wheel heating element output will be disabled until the ignition is cycled.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Steering wheel
3. Clockspring
4. HSWM

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1. D1 CHECK THE HSWM DTCs Ignition ON. Enter the following diagnostic mode on the scan tool: Self-Test - HSWM. Is DTC B135C: 11 present? YES : GO to D2. No : For DTC B135C: 15, GO to D5 . For all other DTCs, REFER to the «Heated Steering Wheel Module (HSWM) DTC Chart»(ref-494604-S29251703372012081400000) .
2. D2 CHECK THE HEATER ELEMENT VOLTAGE CIRCUIT FOR A SHORT TO GROUND Ignition OFF. Disconnect: HSWM C2406. Measure the resistance between ground and HSWM C2406-8, circuit CHS72 (YE/BU), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to D6 . No : GO to D3.
3. D3 CHECK THE HEATER ELEMENT VOLTAGE CIRCUIT FOR A SHORT TO GROUND Remove the steering column shrouds to access the clockspring connectors. Refer to «Steering Column Shroud»(ref-494604-S13461854282012081400000) in this service information. Disconnect: Clockspring C218D. Measure the resistance between ground and HSWM C2406-8, circuit CHS72 (YE/BU), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to D4. No : REPAIR circuit CHS72 (YE/BU) for a short to ground. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
4. D4 CHECK THE HEATER ELEMENT FOR A SHORT TO GROUND Remove the driver air bag module. Refer to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Disconnect: Clockspring C218E. Measure the resistance between ground and clockspring C218E-1, harness side. Is the resistance greater than 10, 000 ohms? YES : INSTALL a new clockspring. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. No : INSTALL a new steering wheel. REFER to «Steering Wheel»(ref-494604-S05004940942012081400000) in this service information. REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
5. D5 CHECK THE HEATER ELEMENT VOLTAGE AND GROUND CIRCUIT FOR A SHORT TO VOLTAGE Ignition OFF. Remove the steering column shrouds to access the clockspring connectors. Refer to «Steering Column Shroud»(ref-494604-S13461854282012081400000) in this service information. Disconnect: Clockspring C218D. Disconnect: HSWM C2406. Ignition ON. Measure the voltage between ground and: HSWM C2406-8, circuit CHS72 (YE/BU), harness side. HSWM C2406-7, circuit RHS72 (YE/GY), harness side. Is any voltage present? YES : REPAIR circuit CHS72 (YE/BU) or RHS72 (YE/GY) for a short to voltage. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. No : GO to D6.
6. D6 CHECK THE HEATER ELEMENT AND CIRCUIT RESISTANCE Ignition OFF. (If ignition is still ON from previous step) Connect: Clockspring C218D (If previously disconnected). Measure the resistance between HSWM C2406-7, circuit RHS72 (YE/GY), harness side and HSWM C2406-8, circuit CHS72 (YE/BU), harness side. Is the resistance between 1.6 and 3.1 ohms? YES : GO to D10 . No : If the resistance is less than 1.6 ohms, GO to D7. If the resistance is more than 3.1 ohms, GO to D8 .
7. D7 CHECK THE HEATER ELEMENT CIRCUITS FOR A SHORT Disconnect: Clockspring C218D. Measure the resistance between HSWM C2406-7, circuit RHS72 (YE/GY), harness side and HSWM C2406-8, circuit CHS72 (YE/BU), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to D9 . No : REPAIR circuit CHS72 (YE/BU) and RHS72 (YE/GY) for a short together. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
8. D8 CHECK THE HEATER ELEMENT CIRCUITS FOR AN OPEN Disconnect: Clockspring C218D. Measure the resistance between HSWM C2406-7, circuit RHS72 (YE/GY), harness side and C218D-2, circuit RHS72 (YE/GY), harness side. Measure the resistance between HSWM C2406-8, circuit CHS72 (YE/BU), harness side and clockspring C218D-1, circuit CHS72 (YE/BU), harness side. Are the resistances less than 5 ohms? YES : GO to D9. No : REPAIR circuit CHS72 (YE/BU) or RHS72 (YE/GY) for an open. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
9. D9 CHECK THE HEATER ELEMENT RESISTANCE Remove the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Disconnect: Clockspring C218E. Measure the resistance between clockspring C218E-1, steering wheel side and clockspring C218E-2, steering wheel side. Is the resistance between 1.6 and 3.1 ohms? YES : INSTALL a new clockspring. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. No : INSTALL a new steering wheel. REFER to «Steering Wheel»(ref-494604-S05004940942012081400000) in this service information. REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
10. D10 CHECK THE HSWM CONNECTION Disconnect all the HSWM connectors. Inspect the HSWM connectors for: corrosion pushed-out terminals damaged terminals Connect and correctly seat all the HSWM connectors. Ignition ON. Clear the DTCs. Enter the following diagnostic mode on the scan tool: Self-Test - Heated Steering Wheel Module (HSWM). Operate the heated steering wheel system and verify the concern is still present. Is the concern still present? YES : INSTALL a new HSWM. REFER to «Heated Steering Wheel Module (HSWM)»(ref-494604-S09845085152012081400000) in this service information. TEST the system for normal operation. No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

When steering wheel heat is requested, the heated steering wheel temperature is maintained by the HSWM using a sensor in the steering wheel (integral to the steering wheel). The resistance of the sensor rises as the temperature falls and the resistance falls as the temperature rises. The resistance can vary from 3, 384 ohms at 50°C (122°F) to 34, 699 ohms at 0°C (32°F). The HSWM supplies a reference voltage and ground to the temperature sensor and monitors the voltage drop from the temperature sensor for controlling current flow to the heating element. The HSWM is designed to remain on, heating the steering wheel and maintaining temperature until switched OFF on the Front Display Interface Module (FDIM) or the ignition is turned OFF.

1. DTC U210A: 11 (Temperature Sensor: Circuit Short to Ground) - This DTC will only set when the heated steering wheel is commanded on. The module reads a resistance value less than 627 ohms on the heating element temperature sensor input circuit for greater than 640ms, indicating a short to ground. The steering wheel heating element output will be disabled until the ignition is cycled.
2. DTC U210A: 15 (Temperature Sensor: Circuit Short to Battery or Open) - This DTC will only set when the heated steering wheel is commanded on. The module reads a resistance value greater than 670, 000 ohms on the heating element temperature sensor reference circuit for greater than 10 minutes, indicating a short to voltage or an open circuit or heating element temperature sensor. The steering wheel heating element output will be disabled until the ignition is cycled.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Steering wheel
3. Clockspring
4. HSWM

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1. E1 CHECK THE HSWM DTCs Ignition ON. Enter the following diagnostic mode on the scan tool: Self-Test - HSWM. Is DTC U210A: 11 present? YES : GO to E2. No : For DTC U210A: 15, GO to E5 . For all other DTCs, REFER to the «Heated Steering Wheel Module (HSWM) DTC Chart»(ref-494604-S29251703372012081400000) .
2. E2 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR REFERENCE CIRCUIT FOR A SHORT TO GROUND Ignition OFF. Disconnect: HSWM C2406. Measure the resistance between ground and HSWM C2406-5, circuit VHS73 (GN/BN), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to E6 . No : GO to E3.
3. E3 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR REFERENCE CIRCUIT FOR A SHORT TO GROUND Depower the Supplemental Restraint System (SRS). REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Remove the steering column shrouds to access the clockspring connectors. Refer to «Steering Column Shroud»(ref-494604-S13461854282012081400000) in this service information. Disconnect: Clockspring C218A. Measure the resistance between ground and HSWM C2406-5, circuit VHS73 (GN/BN), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to E4. No : REPAIR circuit VHS73 (GN/BN) for a short to ground. CONNECT clockspring C218A and HSWM C2406. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
4. E4 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR RESISTANCE Remove the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Disconnect: Clockspring C218B. Measure the resistance between ground and clockspring C218B-1, harness side. Is the resistance greater than 10, 000 ohms? YES : INSTALL a new clockspring. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CONNECT HSWM C2406. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. No : INSTALL a new steering wheel. REFER to «Steering Wheel»(ref-494604-S05004940942012081400000) in this service information. REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CONNECT HSWM C2406. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
5. E5 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR REFERENCE AND GROUND CIRCUIT FOR A SHORT TO VOLTAGE Ignition OFF. Depower the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Remove the steering column shrouds to access the clockspring connectors. Refer to «Steering Column Shroud»(ref-494604-S13461854282012081400000) in this service information. Disconnect: Clockspring C218A. Disconnect: HSWM C2406. Connect: Battery Ground Cable C1100B. Ignition ON. Measure the voltage between ground and: HSWM C2406-5, circuit VHS73 (GN/BN), harness side. HSWM C2406-12, circuit RHS73 (BN/BU), harness side. Is any voltage present? YES : REPAIR circuit VHS73 (GN/BN) or RHS73 (BN/BU) for a short to voltage. DISCONNECT battery ground cable C1100B. CONNECT clockspring C218A and HSWM C2406. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. No : TURN the ignition OFF, DISCONNECT the battery ground cable C1100B, CONNECT clockspring C218A and GO to E6.
6. E6 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR AND CIRCUIT RESISTANCE Measure the resistance between HSWM C2406-5, circuit RHS73 (BN/BU), harness side and HSWM C2406-12, circuit VHS73 (GN/BN), harness side. Is the resistance between 627 and 670, 000 ohms? YES : GO to E10 . No : If the resistance is less than 670 ohms, GO to E7. If the resistance is more than the 670, 000 ohms, GO to E8 .
7. E7 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR CIRCUITS FOR A SHORT Disconnect: Clockspring C218A. Measure the resistance between HSWM C2406-5, circuit RHS73 (BN/BU), harness side and HSWM C2406-12, circuit VHS73 (GN/BN), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to E9 . No : REPAIR circuit VHS73 (GN/BN) and RHS73 (BN/BU) for a short together. CONNECT clockspring C218A and HSWM C2406. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
8. E8 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR CIRCUITS FOR AN OPEN Disconnect: Clockspring C218A. Measure the resistance between HSWM C2406-5, circuit VHS73 (GN/BN), harness side and clockspring C218A-3, circuit VHS73 (GN/BN), harness side. Measure the resistance between HSWM C2406-12, circuit RHS73 (BN/BU), harness side and C218A-2, circuit RHS73 (BN/BU), harness side. Are the resistances less than 5 ohms? YES : GO to E9. No : REPAIR circuit VHS73 (GN/BN) or RHS73 (BN/BU) for an open. CONNECT clockspring C218A and HSWM C2406. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
9. E9 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR RESISTANCE Remove the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Disconnect: Clockspring C218B. Measure the resistance between clockspring C218B-1, steering wheel side and clockspring C218B-2, steering wheel side. Is the resistance between 627 and 670, 000 ohms? YES : INSTALL a new clockspring. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) and connect all electrical connectors. REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . HSWM C2406. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. No : INSTALL a new steering wheel. REFER to «Steering Wheel»(ref-494604-S05004940942012081400000) in this service information. REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . HSWM C2406. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
10. E10 CHECK THE HSWM CONNECTION Disconnect all the HSWM connectors. Inspect the HSWM connectors for: corrosion pushed-out terminals damaged terminals Connect and correctly seat all the HSWM and clockspring connectors. Repower the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Ignition ON. Clear the DTCs. Enter the following diagnostic mode on the scan tool: Self-Test - Heated Steering Wheel Module (HSWM). Operate the heated steering wheel system and verify the concern is still present. Is the concern still present? YES : INSTALL a new HSWM. REFER to «Heated Steering Wheel Module (HSWM)»(ref-494604-S09845085152012081400000) in this service information. TEST the system for normal operation. No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.

1. DTC U0140: 00 (Lost Communication With Body Control Module: No Sub-Type Information) - sets in continuous memory in the Heated Steering Wheel Module (HSWM) if data messages received from the Body Control Module (BCM) over the Medium Speed Controller Area Network (MSCAN) are missing for 5 seconds or more. For a complete list of all network messages, refer to «MODULE COMMUNICATIONS NETWORK»(ref-494551) .
2. DTC U0164: 00 (Lost Communication With HVAC Control Module: No Sub Type Information) - sets in continuous memory in the HSWM if data messages received from the HVAC module over the MS-CAN are missing for 5 seconds or more. For a complete list of all network messages, refer to «MODULE COMMUNICATIONS NETWORK»(ref-494551) .
3. DTC U0256: 00 (Lost Communication With Front Controls Interface Module "A": No Sub Type Information) - sets in continuous memory in the HSWM if data messages received from the Front Controls Interface Module (FCIM) over the MS-CAN are missing for 5 seconds or more. For a complete list of all network messages, refer to «MODULE COMMUNICATIONS NETWORK»(ref-494551) .

This pinpoint test is intended to diagnose the following

1. BCM
2. HVAC module
3. FCIM

When steering wheel heat is requested, the heated steering wheel temperature is maintained by the Heated Steering Wheel Module (HSWM) using a sensor in the steering wheel (integral to the steering wheel). The resistance of the sensor rises as the temperature falls and the resistance falls as the temperature rises. The resistance can vary from 3, 384 ohms at 50°C (122°F) to 34, 699 ohms at 0°C (32°F). The HSWM supplies a reference voltage and ground to the temperature sensor and monitors the voltage drop from the temperature sensor for controlling current flow to the heating element. The HSWM is designed to remain on, heating the steering wheel and maintaining temperature until switched OFF on the Front Display Interface Module (FDIM) or the ignition is turned OFF.

Note. On all vehicles, slow heating between the 10 o'clock and 2 o'clock steering wheel hand positions is considered normal. On vehicles equipped with wood inserts in the steering wheel, there is no heating elements located under the inserts.

This pinpoint test is intended to diagnose the following

1. Wiring, terminals or connectors
2. Steering wheel
3. Clockspring
4. HSWM

Scheme 29

Scheme 30

1. G1 CHECK THE HSWM DTCs Ignition ON. Enter the following diagnostic mode on the scan tool: Self-Test - Heated Steering Wheel Module (HSWM). Are any DTCs present? YES : REFER to the «Heated Steering Wheel Module (HSWM) DTC Chart»(ref-494604-S29251703372012081400000) in this service information. No : GO to G2.
2. G2 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR REFERENCE CIRCUIT FOR LOW RESISTANCE TO GROUND Ignition OFF. Disconnect: HSWM C2406. Measure the resistance between ground and HSWM C2406-5, circuit VHS73 (GN/BN), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to G5 . No : GO to G3.
3. G3 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR REFERENCE CIRCUIT FOR LOW RESISTANCE TO GROUND Depower the Supplemental Restraint System (SRS). REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Remove the steering column shrouds to access the clockspring connectors. Refer to «Steering Column Shroud»(ref-494604-S13461854282012081400000) in this service information. Disconnect: Clockspring C218A. Measure the resistance between ground and: HSWM C2406-5, circuit VHS73 (GN/BN), harness side. HSWM C2406-12, circuit RHS73 (BN/BU), harness side. Are the resistances greater than 10, 000 ohms? YES : GO to G4. No : REPAIR circuit VHS73 (GN/BN) or RHS73 (BN/BU) for low resistance to ground. CONNECT clockspring C218A and HSWM C2406. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
4. G4 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR RESISTANCE Remove the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Disconnect: Clockspring C218B. Measure the resistance between ground and: clockspring C218B-1, steering wheel side. clockspring C218B-2, steering wheel side. Are the resistances greater than 10, 000 ohms? YES : INSTALL a new clockspring. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CONNECT HSWM C2406. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. No : INSTALL a new steering wheel. REFER to «Steering Wheel»(ref-494604-S05004940942012081400000) in this service information. REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CONNECT HSWM C2406. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
5. G5 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR AND CIRCUIT RESISTANCE Measure the resistance between HSWM C2406-5, circuit RHS73 (BN/BU), harness side and HSWM C2406-12, circuit VHS73 (GN/BN), harness side and compare to the table below. Ambient Temperature Resistance 0-10°C (32-50°F) 18, 754-34, 699 ohms 10-20°C (50-68°F) 11, 831-21, 046 ohms 20-25°C (68-77°F) 9, 500-13, 149 ohms 25-30°C (77-86°F) 7, 632-10, 500 ohms 30-35°C (86-95°F) 6, 173-8, 482 ohms 35-40°C (95-104°F) 5, 024-6, 889 ohms 40-50°C (104-122°F) 3, 384-5, 630 ohms Is the resistance within the specified values for the temperature? YES : GO to G8 . No : GO to G6.
6. G6 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR CIRCUITS FOR A SHORT Depower the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Remove the steering column shrouds to access the clockspring connectors. Refer to «Steering Column Shroud»(ref-494604-S13461854282012081400000) in this service information. Disconnect: Clockspring C218A. Measure the resistance between HSWM C2406-5, circuit RHS73 (BN/BU), harness side and HSWM C2406-12, circuit VHS73 (GN/BN), harness side. Is the resistance greater than 10, 000 ohms? YES : GO to G7. No : REPAIR circuit VHS73 (GN/BN) and RHS73 (BN/BU) for low resistance between them. CONNECT clockspring C218A and HSWM C2406. REPOWER the SRS. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
7. G7 CHECK THE HEATER ELEMENT TEMPERATURE SENSOR RESISTANCE Remove the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . Disconnect: Clockspring C218B. Measure the resistance between clockspring C218B-1, steering wheel side and clockspring C218B-2, steering wheel side and compare to the table below. Ambient Temperature Resistance 0-10°C (32-50°F) 18, 754-34, 699 ohms 10-20°C (50-68°F) 11, 831-21, 046 ohms 20-25°C (68-77°F) 9, 500-13, 149 ohms 25-30°C (77-86°F) 7, 632-10, 500 ohms 30-35°C (86-95°F) 6, 173-8, 482 ohms 35-40°C (95-104°F) 5, 024-6, 889 ohms 40-50°C (104-122°F) 3, 384-5, 630 ohms Is the resistance within the specified values for the temperature? YES : INSTALL a new clockspring. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CONNECT HSWM C2406. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation. No : INSTALL a new steering wheel. REFER to «Steering Wheel»(ref-494604-S05004940942012081400000) in this service information. REINSTALL the driver air bag module. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-494575) . CONNECT HSWM C2406. CLEAR the DTCs. REPEAT the self-test. TEST the system for normal operation.
8. G8 CHECK THE HSWM CONNECTION Disconnect all the HSWM connectors. Inspect the HSWM connectors for: corrosion pushed-out terminals damaged terminals Connect and correctly seat all the HSWM and clockspring connectors. Ignition ON. Clear the DTCs. Enter the following diagnostic mode on the scan tool: Self-Test - Heated Steering Wheel Module (HSWM). Operate the heated steering wheel system and verify the concern is still present. Is the concern still present? YES : INSTALL a new HSWM. REFER to «Heated Steering Wheel Module (HSWM)»(ref-494604-S09845085152012081400000) in this service information. TEST the system for normal operation. No : The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. TEST the system for normal operation.