Pinpoint Test AD: DTC B19A8

Seats

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Pinpoint Tests

Pinpoint Test AD: DTC B19A8

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

Normal Operation

The Dual Climate Controlled Seat Module (DCSM) supplies a speed control signal voltage to the driver seat backrest Thermo-Electric Device (TED) on circuit VHS16 (BU/GN). The TED blower is supplied operating voltage from DCSM output circuit CHS03 (GN/BN) and ground from DCSM output circuit RHS03 (GY/OG).

- DTC B19A8 (Driver Seat Back Blower Speed Short to Ground) - If the driver seat backrest blower speed circuit is shorted to ground, the DCSM 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 and blower assembly
- DCSM



PINPOINT TEST AD: DTC B19A8

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 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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