Pinpoint Test AL: DTC B111C
Seating
Pinpoint Test AL: DTC B111C
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 an open on any of these circuits is detected, the DTC will be set.
- DTC B111C (Passenger Thermo-Electric Driver Open Load)- If the DCSM (Dual Climate Controlled Seat Module) output circuits to the passenger seat backrest or cushion TED (Thermo-Electric Device) (circuit pins A, B, C or D 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 AL : DTC B111C
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.
AL1 CHECK THE TED (Thermo-Electric Device) CIRCUITS FOR AN OPEN
- 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: Passenger Seat Side Air Bag C339.
- Disconnect: Passenger Seat Safety Belt Buckle Pretensioner C3066.
- Disconnect: DCSM (Dual Climate Controlled Seat Module) C3265A.
- Disconnect: Cushion TED (Thermo-Electric Device) C3040.
- Disconnect: Backrest TED (Thermo-Electric Device) C3039.
- Measure the resistance between DCSM (Dual Climate Controlled Seat Module) C3265A, harness side and cushion TED (Thermo-Electric Device) C3040, harness side; and between DCSM (Dual Climate Controlled Seat Module) C3265A, harness side and backrest TED (Thermo-Electric Device) C3039, harness side using the following chart:
Are the resistances less than 5 ohms?
Yes
GO to AL2.
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.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
AL2 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
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.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to AL3.
AL3 CHECK THE BACKREST AND CUSHION TED (Thermo-Electric Device) RESISTANCE
- Ignition OFF.
- Measure the resistance between:
- backrest TED (Thermo-Electric Device) C3039 pin 1 and pin 3, component side.
- cushion TED (Thermo-Electric Device) C3039 pin 1 and pin 3, component 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.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
If backrest TED (Thermo-Electric Device) resistance is not between 0.9 and 10 ohms, INSTALL a new backrest TED (Thermo-Electric Device). REFER to Seat Backrest Thermo-Electric Device . CLEAR the DTCs. REPEAT the self-test.
If cushion TED (Thermo-Electric Device) resistance is not between 0.9 and 10 ohms, 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.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.