No | REFER to: Airbag Supplemental Restraint System (SRS) (501-20B Supplemental Restraint System, Diagnosis and Testing). |
|---|
DTC B19A4
Refer to Wiring Diagrams Cell 119 for schematic and connector information.
Normal Operation and Fault Conditions
The SCME supplies voltage and ground to the driver seat backrest blower motor. The SCME also sends a speed control voltage signal to the blower motor to control blower speed.
DTC Fault Trigger Conditions
DTC | Description | Fault Trigger Conditions |
|---|---|---|
B19A4 Driver Seat Back Blower Speed Short to Battery | If the driver seat backrest blower speed circuit is shorted to voltage, the SCME shuts down the driver seat system and sets this DTC. |
Possible Causes
Wiring, terminals or connectors Backrest blower motor SCME
PINPOINT TEST U : DTC B19A4
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.
U1 CHECK BACKREST BLOWER MOTOR SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE
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: SCME C3265C. Ignition ON. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C3265C-12 | Ground |
Is any voltage present?
Yes | GO to U2 |
|---|---|
No | GO to U3 |
U2 CHECK BACKREST BLOWER MOTOR BLOWER SPEED CONTROL CIRCUIT FOR A SHORT TO VOLTAGE WITH THE CIRCUIT ISOLATED
Ignition OFF. Disconnect: Driver Seat Backrest Blower Motor C3034. Ignition ON. Measure:
Click to display connectors
Positive Lead | Measurement / Action | Negative Lead |
|---|---|---|
C3265C-12 | Ground |
Is any voltage present?
Yes | REPAIR the circuit. GO to U6 |
|---|---|
No | GO to U3 |
U3 CHECK BACKREST BLOWER MOTOR BLOWER SPEED CONTROL AND BLOWER OUTPUT CIRCUITS FOR A SHORT TOGETHER
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