DTC C0245 W/ JL4
Circuit Description
As the wheels spin, each wheel speed sensor produces an AC signal. The electronic brake control module (EBCM) uses the frequency of the AC signals to calculate each wheel speed.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0245 Wheel Speed Sensor Frequency Error
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The vehicle speed is greater than 8 km/h (4 mph). |
| • | No brake application or deceleration is detected. |
| • | No wheel slip is detected. |
| • | No turning maneuvers are detected. |
Conditions for Setting the DTC
| • | At least one wheel speed sensor signal is 15 percent less than or greater than other wheel speed sensor signals. |
| • | All of the Conditions for Running and Setting the DTC are present for a cumulative time of 3 minutes during a single ignition cycle. |
Action Taken When the DTC Sets
| • | The EBCM disables the ABS/TCS/VSES/DRP. |
| • | The ABS indicator turns ON. |
| • | The traction off indicator turns ON. |
| • | The message center displays the service stability system message. |
| • | The brake warning indicator turns ON. |
Conditions for Clearing the DTC
The Conditions for Setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Diagnostic Aids
Operating the vehicle with a tire that has very low air pressure may set this DTC.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 | Inspect all of the tires on the vehicle to ensure that all of the tires are of equal size. Did you find and correct the condition? | Go to Step 4 | Go to Step 3 |
3 | Inspect the wheel speed sensors and tone rings for damage, incorrect application, or incorrect installation. Did you find and correct the condition? | Go to Step 4 | Go to Diagnostic Aids |
4 |
Does the DTC reset? | Go to Step 2 | System OK |
DTC C0245 W/O JL4
Circuit Description
The ABS relay supplies battery voltage to 6 valve solenoids. The electronic brake control module (EBCM) microprocessor applies the grounds needed to activate each solenoid. The low side of each solenoid coil has a feedback circuit to the EBCM microprocessor. When a solenoid is commanded OFF, the feedback voltage is high. When a solenoid is commanded ON, the feedback voltage is low.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0245 EBCM Control Valve Circuit
Conditions for Running the DTC
| • | The ignition is ON. |
| • | The vehicle speed is greater than 6 km/h (4 mph). |
Conditions for Setting the DTC
The EBCM detects an internal malfunction.
Action Taken When the DTC Sets
| • | The EBCM disables the DRP/ABS. |
| • | The ABS indicator turns ON. |
| • | The red brake warning indicator turns ON. |
Conditions for Clearing the DTC
The conditions for setting the DTC are no longer present and you use the scan tool Clear DTCs function.
Diagnostic Aids
An intermittent open/shorted solenoid DTC can be set by several different internal EBCM problems. Replace the EBCM if an open/shorted solenoid DTC continues to set intermittently.
Step | Action | Yes | No |
|---|---|---|---|
1 | Did you perform the Diagnostic System Check - Vehicle? | Go to Step 2 | Go to Diagnostic System Check - Vehicle in Vehicle DTC Information |
2 |
Does the DTC set? | Go to Step 3 | Go to Diagnostic Aids |
3 | Replace the electronic brake control module (EBCM). Refer to Control Module References in Computer/Integrating Systems for replacement, setup, and programming. Did you complete the replacement? | Go to Step 4 | -- |
4 |
Does the DTC reset? | Go to Step 3 | System OK |
