Central Control Module (CCM)

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

The steering wheel speed sensor is a potentiometer that can continuously rotate with one wiper in the potentiometer port: on of the sensor. The Variable Effort Steering (VES) steering wheel speed sensor is monitored for shorts to grounds or opens CKTs 1573 or 1574.

DTC WILL SET WHEN

IGN 1 is "ON" and steering wheel speed sensor input is 0.254 volt or less, for longer than 0.2 of a second.

ACTION TAKEN

DTC 44 will set. The VES system will disable, and power steering will return to normal.

DTC WILL CLEAR WHEN

DTC 44 will clear if fault goes away for 2 or more seconds.

DTC CHART TEST DESCRIPTION

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

1. This test checks for an open or short in steering wheel speed sensor.

2. This test will check for a short to ground on CKT 1573 or CKT 1574.

3. This test will check for an open in CKT 1573.

4. This test will check for an open in CKT 1574.

DIAGNOSTIC AIDS

check the CCM and the steering wheel speed sensor connectors for loose or damaged connections. If problem is intermittent do the "wiggle test" with the connections and wiring while the power steering system is operating. A Tech 1 can be used to monitor the steering wheel speed sensor input voltage as the wheel is turned or road tested.