B1111

Seats

Pinpoint Test AB: DTC B103B/B1111

Refer to Wiring Diagram Set 119, Climate Controlled Seats for schematic and connector information Electrical Diagrams.

Normal Operation

Each climate controlled seat is controlled independently of the other by the Dual Climate Controlled Seat Module (DCSM) mounted to the bottom of the passenger seat cushion. The climate controlled seats only operate with the engine running, however, if using a scan tool, diagnostic testing can be carried out with the ignition ON engine OFF. The system receives voltage from Battery Junction Box (BJB) fuse 67 (40A) supplying battery voltage on circuit SBB08 (VT/RD) into DCSM (Dual Climate Controlled Seat Module) C3265A pins E and F. If voltage is disconnected from either circuit, both seats will remain operational because voltage supply is internally connected in the DCSM (Dual Climate Controlled Seat Module). However, if a fault occurs setting a DTC specific to either climate controlled seat, only the affected seat will be disabled.

Each seat cushion and backrest is equipped with a Thermo-Electric Device (TED) that includes a seat blower that is serviced as an assembly with the TED (Thermo-Electric Device). Cabin air is drawn through the blower and distributed to each of the TED (Thermo-Electric Device) modules. The TEDs (Thermo-Electric Devices) then heat or cool the air and direct it into the foam pad and manifold where it is distributed along the surface of the cushion and backrest of the seat. Once the system is activated, the DCSM (Dual Climate Controlled Seat Module) uses a set of flexible algorithms to control the heating/cooling modes and the blower speed dependant on the climate controlled seat switch settings.

- DTC B103B (Thermoelectric Driver Overcurrent Low)- If DCSM (Dual Climate Controlled Seat Module) outputs to the driver seat backrest or cushion TED (Thermo-Electric Device) (circuit pins G, H, J or K at the DCSM (Dual Climate Controlled Seat Module) connector) or any components within these circuit loops are shorted to ground or a TED (Thermo-Electric Device) resistance of less than 0.9 ohm is sensed, the DCSM (Dual Climate Controlled Seat Module) will shut down the driver seat system and set this DTC.

- DTC B1111 (Driver Thermoelectric Device Control Overtemperature Fault)- If the DCSM (Dual Climate Controlled Seat Module) TED (Thermo-Electric Device) driver integrated circuit temperature exceeds 175°C (347°F), the DCSM (Dual Climate Controlled Seat Module) will shut down the driver seat system and set 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 AB : DTC B103B/B1111

NOTICE: When taking measurements at Dual Climate Controlled Seat Module (DCSM) harness connectors, do not insert the electrical probes into the female connector pins. Inserting the probes into connector pins can cause intermittent or open electrical connections after reassembly resulting in Diagnostic Trouble Codes (DTCs) and system failure. Touching the tip of these connector pins is recommended instead.

NOTE: The air bag warning indicator illuminates when the correct Restraints Control Module (RCM) fuse is removed and the ignition is ON.

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

AB1 CHECK THE TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO GROUND

- Ignition OFF.

- 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: Driver Seat Safety Belt Buckle Pretensioner C3049 and Passenger Seat Safety Belt Buckle Pretensioner C3050.

- Disconnect: Driver Seat Side Air Bag C3051 and Passenger Seat Side Air Bag C3052.

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

- 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.

Connect the battery ground cable.

- Measure the resistance between the following DCSM (Dual Climate Controlled Seat Module) C3265A pins, harness side and ground.

Connector Circuit C3265A-G CHS02 (YE/BU) C3265A-H RHS02 (BU/OG) C3265A-J CHS01 (GY/VT) C3265A-K RHS01 (WH/VT)






Are the resistances greater than 10,000 ohms?

Yes
GO to AB2.

No
If the resistances of C3265A-G, circuit CHS02 (YE/BU) and/or C3265A-H, circuit RHS02 (BU/OG) to ground were not greater than 10,000 ohms to ground, GO to AB6.

If resistances of C3265A-J, circuit CHS01 (GY/VT) and/or C3265A-K, circuit RHS01 (WH/VT) to ground were not greater than 10,000 ohms to ground, GO to AB7.

AB2 CHECK THE TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE

- Ignition ON.

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

Connector Circuit C3265A-G CHS02 (YE/BU) C3265A-H RHS02 (BU/OG) C3265A-J CHS01 (GY/VT) C3265A-K RHS01 (WH/VT)






Is voltage present on any circuit?

Yes
If voltage is measured at C3265A-G and/or C3265A-H, GO to AB8.

If voltage is measured at C3265A-J and/or C3265A-K, GO to AB9.

No
GO to AB3.

AB3 CHECK THE TED (Thermo-Electric Device) RESISTANCE

- Ignition OFF.

- NOTICE: Make sure the Thermo-Electric Devices (TEDs) are at room temperature and there is no air blowing across the TEDs (Thermo-Electric Devices). Do not handle a TED (Thermo-Electric Device) when measuring resistance. These conditions can cause incorrect readings and lead to incorrect identification of components that are not faulty.

Measure the resistance between:
- DCSM (Dual Climate Controlled Seat Module) C3265A-G, circuit CHS02 (YE/BU), harness side and DCSM (Dual Climate Controlled Seat Module) C3265A-H, circuit RHS02 (BU/OG), harness side.

- DCSM (Dual Climate Controlled Seat Module) C3265A-J, circuit CHS01 (GY/VT), harness side and C3265A-K, circuit RHS01 (WH/VT), harness side.






Are the resistances between 0.9 and 10 ohms?

Yes
INSTALL a new DCSM (Dual Climate Controlled Seat Module). REFER to Dual Climate Controlled Seat Module (DCSM) . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
If the resistance between DCSM (Dual Climate Controlled Seat Module) C3265A-G and C3265A-H was not between 0.9 and 10 ohms, GO to AB5.

If the resistance between DCSM (Dual Climate Controlled Seat Module) C3265A-J and C3265A-K was not between 0.9 and 10 ohms, GO to AB4.

AB4 CHECK RESISTANCE OF THE BACKREST TED (Thermo-Electric Device)

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

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





Is the resistance between 0.9 and 10 ohms?

Yes
REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
INSTALL a new backrest TED (Thermo-Electric Device). REFER to Seat Backrest Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

AB5 CHECK RESISTANCE OF THE CUSHION TED (Thermo-Electric Device)

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

- Measure the resistance between cushion TED (Thermo-Electric Device) C3035 pin 1 and pin 3, component side.





Is the resistance between 0.9 and 10 ohms?

Yes
REPAIR the affected circuit. CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
INSTALL a new cushion TED (Thermo-Electric Device). REFER to Seat Cushion Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

AB6 CHECK THE CUSHION TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO GROUND

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

- Measure the resistance between:
- DCSM (Dual Climate Controlled Seat Module) C3265A-G, circuit CHS02 (YE/BU), harness side and ground.

- DCSM (Dual Climate Controlled Seat Module) C3265A-H, circuit RHS02 (BU/OG), harness side and ground.






Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new cushion TED (Thermo-Electric Device). REFER to Seat Cushion Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

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

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

AB7 CHECK THE BACKREST TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO GROUND

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

- Measure the resistance between:
- DCSM (Dual Climate Controlled Seat Module) C3265A-J, circuit CHS01 (GY/VT), harness side and ground.

- DCSM (Dual Climate Controlled Seat Module) C3265A-K, circuit RHS01 (WH/VT), harness side and ground.






Are the resistances greater than 10,000 ohms?

Yes
INSTALL a new backrest TED (Thermo-Electric Device). REFER to Seat Backrest Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

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

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

AB8 CHECK THE CUSHION TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE

- Ignition OFF.

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

- Ignition ON.

- Measure the voltage between:
- DCSM (Dual Climate Controlled Seat Module) C3265A-G, circuit CHS02 (YE/BU), harness side and ground.

- DCSM (Dual Climate Controlled Seat Module) C3265A-H, circuit RHS02 (BU/OG), harness side and ground.






Is voltage present on any circuits?

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

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
INSTALL a new cushion TED (Thermo-Electric Device). REFER to Seat Cushion Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

AB9 CHECK THE BACKREST TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE

- Ignition OFF.

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

- Ignition ON.

- Measure the voltage between:
- DCSM (Dual Climate Controlled Seat Module) C3265A-J, circuit CHS01 (GY/VT), harness side and ground.

- DCSM (Dual Climate Controlled Seat Module) C3265A-K, circuit RHS01 (WH/VT), harness side and ground.






Is voltage present on any circuits?

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

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.

No
INSTALL a new backrest TED (Thermo-Electric Device). REFER to Seat Backrest Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test.

DISCONNECT the battery ground cable. CONNECT driver seat safety belt buckle pretensioner C3049 and passenger seat safety belt buckle pretensioner C3050.

CONNECT driver seat side air bag module C3051 and passenger seat side air bag module C3052.

REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.