Pinpoint Test AD: DTC B19A3
Seats
Pinpoint Test AD: DTC B19A3
Normal Operation
The Dual Climate Controlled Seat Module (DCSM) supplies a speed control signal voltage to the driver seat cushion Thermo-Electric Device (TED) on circuit VHS18 (BN/GN). The TED (Thermo-Electric Device) blower is supplied operating voltage from DCSM (Dual Climate Controlled Seat Module) output circuit CHS03 (GN/BN) and ground from DCSM (Dual Climate Controlled Seat Module) output circuit RHS03 (GY/OG).
- DTC B19A3 (Driver Seat Cushion Blower Speed Short to Battery)- If the driver seat cushion blower speed circuit is shorted to voltage, 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) and blower assembly
- DCSM (Dual Climate Controlled Seat Module)
PINPOINT TEST AD : DTC B19A3
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.
AD1 CHECK CUSHION TED (Thermo-Electric Device) BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
- 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 C3134.
- Disconnect: Driver Safety Belt Buckle Pretensioner C3065.
- Disconnect: Passenger Seat Side Air Bag C3133.
- Disconnect: Passenger Safety Belt Buckle Pretensioner C3066.
- Disconnect: DCSM (Dual Climate Controlled Seat Module) C3265c.
- 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 the voltage between C3265C-11, circuit VHS18 (BN/GN), harness side and ground.
Is any voltage present?
Yes
GO to AD2.
No
GO to AD3.
AD2 CHECK CUSHION TED (Thermo-Electric Device) BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
- Disconnect: Cushion TED (Thermo-Electric Device) C3035.
- Measure the voltage between C3265C-11, circuit VHS18 (BN/GN), harness side and ground.
Is any voltage present?
Yes
REPAIR the circuit. CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT passenger safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C3133.
CONNECT driver safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag module C3134.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
No
GO to AD3.
AD3 CHECK CUSHION TED (Thermo-Electric Device) BLOWER SPEED CONTROL AND BLOWER OUTPUT CIRCUITS FOR A SHORT TOGETHER
- Ignition OFF.
- Disconnect: Cushion TED (Thermo-Electric Device) C3035.
- Measure the resistance between DCSM (Dual Climate Controlled Seat Module) C3265C-11, circuit VHS18 (BN/GN), harness side and C3265C-16, circuit CHS03 (GN/BN), harness side.
Is the resistance greater than 10,000 ohms?
Yes
GO to AD4.
No
REPAIR the circuits. CLEAR the DTCs. REPEAT the self-test.
DISCONNECT the battery ground cable.
CONNECT passenger safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C3133.
CONNECT driver safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag module C3134.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.
AD4 CHECK THE CUSHION TED (Thermo-Electric Device) RESISTANCE FOR AN INTERNAL SHORT
- Measure the resistance between cushion TED (Thermo-Electric Device) C3035 pin 2 and pin 7, component side.
Is the resistance greater than 2M 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 safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C3133.
CONNECT driver safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag module C3134.
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 safety belt buckle pretensioner C3066.
CONNECT passenger seat side air bag module C3133.
CONNECT driver safety belt buckle pretensioner C3065.
CONNECT driver seat side air bag module C3134.
REPOWER the SRS (Supplemental Restraint System). REFER to Restraints and Safety Systems &/or Air Bag Systems.