Normal Operation
WARNING: This page is about a different car, the 2012 Ford Pickup, 2012 Ford F550 Super Duty, 2012 Ford F450 Super Duty, and 2012 Ford Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
The wheel speed sensor and sensor ring generate a square wave signal to the ABS module that is proportional to wheel speed. The ABS module compares wheel speed inputs from all wheel speed sensors to determine an impending wheel lockup.
Voltage and ground signals are supplied to the wheel speed sensors from the ABS module.
| DTC Description | Fault Trigger Condition |
|---|---|
|
A continuous and on-demand DTC that sets when the vehicle speed exceeds 20 km/h (12 mph), if the ABS module detects a difference between wheel speed sensor signals, sets. DTC C1222 can also set by damaged tone rings, mismatched wheel and/or tire sizes or driving the vehicle on one or more deflated tires. |
|
Continuous and on-demand DTCs that set when the vehicle speed exceeds 20 km/h (12 mph), if the ABS module does not receive a signal from the wheel speed sensor, the appropriate DTC sets. These DTCs can also set by an excessive wheel speed sensor-to-tone ring air gap or a damaged tone ring. |
This pinpoint test is intended to diagnose the following:
- Mismatched tire sizes
- Wheel speed sensor tone ring
- Wheel speed sensor
- ABS module