Normal Operation and Fault Conditions
DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
B19A8 Driver Seat Back Blower Speed Short to Ground | If the driver seat backrest blower speed circuit is shorted to ground, the SCME shuts down the driver seat system and sets this DTC. |
Possible Causes
Wiring, terminals or connectors Backrest blower motor SCME
PINPOINT TEST Y : DTC B19A8
WARNING: Incorrect repair techniques or actions can cause an accidental Supplemental Restraint System (SRS) deployment. Never compromise or depart from these instructions. Failure to precisely follow all instructions could result in serious personal injury from an accidental deployment.
Y1 CHECK BACKREST BLOWER MOTOR SPEED CONTROL CIRCUIT FOR A SHORT TO GROUND
REFER to: Supplemental Restraint System (SRS) Depowering (501-20B Supplemental Restraint System, General Procedures). Disconnect: Driver Side Airbag In-line C345. Disconnect: Passenger Side Airbag In-line C219. Disconnect: Driver Seat Backrest Blower Motor C3034. Disconnect: SCME C3265C. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C3265C-12 | Ground |
Is the resistance greater than 10,000 ohms?
Yes | GO to Y2 |
|---|---|
No | REPAIR the circuit. GO to Y5 |
Y2 CHECK BACKREST BLOWER MOTOR SPEED CONTROL CIRCUIT AND BLOWER GROUND CIRCUIT FOR A SHORT TOGETHER
Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C3265C-12 | C3265C-15 |
Is the resistance greater than 10,000 ohms?
Yes | GO to Y3 |
|---|---|
No | REPAIR the circuits. GO to Y5 |
Y3 DETERMINE BACKREST BLOWER MOTOR OR SCME (FRONT SEAT CLIMATE CONTROL MODULE) FAILURE
Remove the backrest blower motor from the driver seat. REFER to: Front Seat Backrest Blower Motor (501-10 Front Seats) . Remove the backrest blower motor from the passenger seat and install it on the driver seat. Connect: Driver Seat Backrest Blower Motor C3034. Connect: SCME C3265C. Start the engine and check operation of the driver seat climate controlled seat system.
Does the seat operate with the backrest blower motor from the other seat installed?
Yes | INSTALL a new seat backrest blower motor. REFER to: Front Seat Backrest Blower Motor (501-10 Front Seats) . GO to Y5 |
|---|---|
No | GO to Y4 |
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