C0037

Circuit Diagram:

DTC C0037 - Rear Speed Signal Erratic:

CIRCUIT DESCRIPTION
The rear wheel speed signal originates from the Vehicle Speed Sensor (VSS) which is connected to the Vehicle Control Module (VCM). The Electronic Brake Control Module (EBCM) receives the rear wheel speed signal from the VCM.

CONDITIONS FOR SETTING THE DIAGNOSTIC TROUBLE CODE (DTC)
EBCM sees the rear speed signal line drop out and return. This DTC can be caused by a malfunction in the VSS or a fault in circuits 821, 822 or 696.

ACTION TAKEN WHEN THE DTC SETS
^ ANTILOCK indicator lamp is illuminated
^ Antilock Brake System (ABS) is disabled

DIAGNOSTIC AIDS
This DTC can be caused by a malfunction in the VSS or a fault in circuits 821, 822 or 696.

DTC CHART TEST DESCRIPTION

NOTE: Number(s) below refer to number(s) on the diagnostic chart.

2. Measure the voltage at terminal E of the EBCM.
3. Check for an open in circuit 696.
5. Check for a short to ground in circuit 696.