Pinpoint Test AH: DTCs B103B and B1111
Seating
Pinpoint Test AH: DTCs B103B and B1111
Refer to Wiring Diagram Set 119, Climate Controlled Seats for schematic and connector information. Diagrams By Number
Normal Operation
The Dual Climate Controlled Seat Module (DCSM) monitors the Thermo-Electric Device (TED) circuits. If a short to ground or voltage on any of these circuits is detected, the DTC(s) will be set.
- DTC B103B (Thermo-Electric 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 Thermo-Electric 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 AH : DTCs B103B AND 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 switch is ON.
NOTE: The Supplemental Restraint System (SRS) must be fully operational and free of faults before releasing the vehicle to the customer.
AH1 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 Side Air Bag C3051.
- Disconnect: Driver Seat Safety Belt Buckle Pretensioner C3065.
- Disconnect: Passenger Seat Side Air Bag C339.
- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3066.
- Disconnect: DCSM (Dual Climate Controlled Seat Module) C3265A.
- Measure the resistance between DCSM (Dual Climate Controlled Seat Module) C3265A, harness side and ground using the following chart:
Are the resistances greater than 10,000 ohms?
Yes
GO to AH2.
No
If the resistance of C3265A-G, circuit CHS02 (YE/BU) and/or C3265A-H, circuit RHS02 (BU/OG) to ground is not greater than 10,000 ohms to ground, GO to AH6.
If the resistance of C3265A-J, circuit CHS01 (GY/VT) and/or C3265A-K, circuit RHS01 (WH/VT) to ground is not greater than 10,000 ohms to ground, GO to AH7.
AH2 CHECK THE TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE
- 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.
- Ignition ON.
- Measure voltage between DCSM (Dual Climate Controlled Seat Module) C3265A, harness side and ground using the following chart:
Is voltage present on any circuits?
Yes
If voltage is present at C3265A-G and/or C3265A-H, GO to AH8.
If voltage is present at C3265A-J and/or C3265A-K, GO to AH9.
No
GO to AH3.
AH3 CHECK THE RESISTANCE OF THE TED (Thermo-Electric Device) AND WIRING
- Ignition OFF.
- 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 passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
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 is not between 0.9 and 10 ohms, GO to AH5.
If the resistance between DCSM (Dual Climate Controlled Seat Module) C3265A-J and C3265A-K is not between 0.9 and 10 ohms, GO to AH4.
AH4 CHECK THE BACKREST TED (Thermo-Electric Device) RESISTANCE
- 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 circuit(s). CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
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 passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
AH5 CHECK THE CUSHION TED (Thermo-Electric Device) RESISTANCE
- 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 circuit(s). CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
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 passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
AH6 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 passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
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 passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
AH7 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 passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
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 passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
AH8 CHECK THE CUSHION TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE
- Disconnect: Cushion TED (Thermo-Electric Device) C3035.
- Ignition ON.
- Measure 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 either circuit?
Yes
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
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 passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
AH9 CHECK THE BACKREST TED (Thermo-Electric Device) CIRCUITS FOR A SHORT TO VOLTAGE
- Disconnect: Backrest TED (Thermo-Electric Device) C3034.
- Ignition ON.
- Measure 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 either circuit?
Yes
REPAIR the circuit(s). CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
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 passenger seat safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C339.
CONNECT driver seat safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag C3051.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.