Pinpoint Test AE: DTC B19A5
Seats
Pinpoint Tests
Pinpoint Test AE: DTC B19A5
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) supplies a speed control signal voltage to the passenger seat cushion Thermo-Electric Device (TED) on circuit VHS23 (BN/BU). The TED blower is supplied operating voltage from DCSM output circuit CHS08 (BN/YE) and ground from DCSM output circuit RHS08 (VT/WH).
- DTC B19A5 Passenger Seat Cushion Blower Speed Short to Ground - If the passenger seat cushion blower speed circuit is shorted to ground, the DCSM will shut down the passenger seat system and set this DTC.
This pinpoint test is intended to diagnose the following:
- Wiring, terminals or connectors
- TED and blower assembly
- DCSM
PINPOINT TEST AE: DTC B19A5
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.
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.
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AE1 CHECK CUSHION TED BLOWER SPEED CONTROL CIRCUIT VHS23 (BN/BU) FOR A SHORT TO GROUND
- Ignition OFF.
- Depower the SRS. Refer to Supplemental Restraint System (SRS) Depowering and Repowering in the General Procedures portion of Air Bag Systems.
- Disconnect: Passenger Seat Side Air Bag C313.
- Disconnect: DCSM C3305c.
- Disconnect: Cushion TED C3303.
- Measure resistance between DCSM C3305c-3, circuit VHS23 (BN/BU), harness side and ground.
- Is resistance greater than 10,000?
Yes
GO to AE2.
No
REPAIR the circuit. REPEAT the self-test. CLEAR the DTCs.
CONNECT passenger seat side air bag module C313.
REPOWER the SRS. REFER to Air Bag Systems.
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AE2 CHECK CUSHION TED BLOWER SPEED CONTROL CIRCUIT VHS23 (BN/BU) AND BLOWER GROUND CIRCUIT RHS08 (VT/WH) FOR A SHORT TOGETHER
- Measure resistance between DCSM C3305c-3, circuit VHS23 (BN/BU), harness side and C3305c-7, circuit RHS08 (VT/WH), harness side.
- Is resistance greater than 10,000?
Yes
GO to AE3.
No
REPAIR the circuits. REPEAT the self-test. CLEAR the DTCs.
CONNECT passenger seat side air bag module C313.
REPOWER the SRS. REFER to Air Bag Systems.
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AE3 DETERMINE CUSHION TED OR DCSM FAILURE
- Remove the cushion TED from the passenger seat. Refer to Seat Cushion Thermo-Electric Device Seat Cushion Thermo-Electric Device.
- Remove the cushion TED from the driver seat and install it on the passenger seat.
- Connect: Cushion TED C3303.
- Connect: Dual Climate Controlled Seat Module (DCSM) C3305c.
- 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. Refer to Battery.
- Start the engine and check operation of the passenger seat climate controlled seat system.
- Does the seat operate with the TED from the other seat installed?
Yes
INSTALL a new cushion TED. REFER to Seat Cushion Thermo-Electric Device Seat Cushion Thermo-Electric Device. REPEAT the self-test. CLEAR the DTCs.
DISCONNECT the battery ground cable.
CONNECT passenger seat side air bag module C313.
REPOWER the SRS. REFER to Air Bag Systems.
No
INSTALL a new DCSM. REFER to Dual Climate Controlled Seat Module (DCSM) Dual Climate Controlled Seat Module (DCSM). REPEAT the self-test.
CLEAR the DTCs.
DISCONNECT the battery ground cable.
CONNECT passenger seat side air bag module C313.
REPOWER the SRS. REFER to Air Bag Systems.
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