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Pinpoint Test O: DTC B103C




Seats

Pinpoint Test O: DTC B103C



Normal Operation

The seat cushion and backrest are equipped with a Thermo-Electric Device (TED) assembly that includes a seat blower (fan motor, serviced as an assembly with the TED (Thermo-Electric Device) ). If the Dual Climate Controlled Seat Module (DCSM) detects an open circuit or high TED (Thermo-Electric Device) resistance, the following DTC will be set:

- DTC B103C (Thermoelectric Driver Open Load)- If DCSM (Dual Climate Controlled Seat Module) outputs to the driver seat backrest or cushion TED (Thermo-Electric Device) (circuit pin G, H, J or K at the DCSM (Dual Climate Controlled Seat Module) connector) or any components within these circuit loops are open, disconnected or a TED (Thermo-Electric Device) resistance greater than 90,000 ohms is sensed, the DCSM (Dual Climate Controlled Seat Module) continues normal operation and sets this DTC.

This pinpoint test is intended to diagnose the following:

- Wiring, terminals or connectors

- TED (Thermo-Electric Device) assembly

- DCSM (Dual Climate Controlled Seat Module)

PINPOINT TEST O : DTC B103C

NOTICE: Use the correct probe adapter(s) from the Flex Probe Kit when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.

O1 CHECK THE TED (Thermo-Electric Device) CIRCUITS FOR AN OPEN

NOTE: If a seat equipped with a seat mounted side air bag is being serviced, the Supplemental Restraint System (SRS) must be depowered. Refer to Restraints and Safety Systems &/or Air Bag Systems.

NOTE: The air bag warning lamp illuminates when the Restraints Control Module (RCM) fuse is removed and the ignition switch is ON. This is normal operation and does not indicate an SRS (Supplemental Restraint System) fault.

NOTE: The SRS (Supplemental Restraint System) must be fully operational and free of faults before releasing the vehicle to the customer.

- Ignition OFF.

- WARNING: Make sure no one is in the vehicle and there is nothing blocking or placed in front of any air bag module when the battery is connected. Failure to follow these instructions may result in serious personal injury in the event of an accidental deployment.

For vehicles equipped with seat side air bags, carry out the following:
- Depower the SRS (Supplemental Restraint System). Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Restraints and Safety Systems &/or Air Bag Systems.

- Disconnect the driver seat side air bag module C3051.

- Disconnect the passenger seat side air bag module C339.

- Connect the battery ground cable.

- Disconnect: DCSM (Dual Climate Controlled Seat Module) C3265A.

- Disconnect: Driver Cushion TED (Thermo-Electric Device) C3035.

- Disconnect: Driver Backrest TED (Thermo-Electric Device) C3034.

- Measure the resistance between DCSM (Dual Climate Controlled Seat Module) C3265A, harness side and driver cushion TED (Thermo-Electric Device) C3035, harness side; and between DCSM (Dual Climate Controlled Seat Module) C3265A, harness side and driver backrest TED (Thermo-Electric Device) C3034, harness side using the following chart:

DCSM (Dual Climate Controlled Seat Module) Connector Circuit TED (Thermo-Electric Device) Connector C3265A-G CHS02 (YE/BU) C3035-1 C3265A-H RHS02 (BU/OG) C3035-3 C3265A-J CHS01 (GY/VT) C3034-1 C3265A-K RHS01 (WH/VT) C3034-3






Are the resistances less than 5 ohms?

Yes
GO to O2.

No
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C339. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

O2 CHECK THE TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE

- Ignition ON.

- Measure the voltage between DCSM (Dual Climate Controlled Seat Module) C3265A, harness side and ground using the following chart:

DCSM (Dual Climate Controlled Seat Module) Connector Circuit C3265A-G CHS02 (YE/BU) C3265A-H RHS02 (BU/OG) C3265A-J CHS01 (GY/VT) C3265A-K RHS01 (WH/VT)






Is any voltage present on either circuit?

Yes
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.

For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C339. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
GO to O3.

O3 CHECK THE DRIVER BACKREST TED (Thermo-Electric Device) AND CUSHION TED (Thermo-Electric Device) RESISTANCES

- Ignition OFF.

- Measure the resistance between:
- driver backrest TED (Thermo-Electric Device) C3034 pins 1 and 3, component side.

- driver cushion TED (Thermo-Electric Device) C3035 pins 1 and 3, component side.






Are the resistances between 0.9 and 10 ohms?

Yes
GO to O4.

No
If the backrest TED (Thermo-Electric Device) resistance is not between 0.9 and 10 ohms, INSTALL a driver new backrest TED (Thermo-Electric Device). REFER to Seat Backrest - Front, Bucket Seat . CLEAR the DTCs. REPEAT the self-test.

For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C339. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

If the driver cushion TED (Thermo-Electric Device) resistance is not between 0.9 and 10 ohms, INSTALL a new driver cushion TED (Thermo-Electric Device). REFER to Seat Cushion - Front, Bucket Seat . CLEAR the DTCs. REPEAT the self-test.

For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C339. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

O4 CHECK FOR CORRECT DCSM (Dual Climate Controlled Seat Module) OPERATION

- Disconnect all the DCSM (Dual Climate Controlled Seat Module) electrical connectors.

- Check the harness and component side connectors for the following:
- corrosion.
- damaged pins.
- pushed-out pins.

- Connect all the DCSM (Dual Climate Controlled Seat Module) electrical connectors and make sure they seat correctly.

- Start the engine.

- Operate the climate controlled seats and verify system operation.

- CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes).

- Enter the following diagnostic mode on the scan tool: Self Test- DCSM (Dual Climate Controlled Seat Module).

Is DTC B103C still present?

Yes
INSTALL a new DCSM (Dual Climate Controlled Seat Module). REFER to Dual Climate Controlled Seat Module (DCSM) . CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). REPEAT the self-test.

For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C339. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR all CMDTCs (Continuous Memory Diagnostic Trouble Codes). REPEAT the self-test.

For vehicles equipped with seat side air bags, DISCONNECT the battery ground cable. CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C339. REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

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