Circuit Description
This circuit is used to monitor the voltage level available to the electronic brake control module (EBCM). If the voltage rises above a certain level, damage to the system may occur.
Conditions for Setting the DTC
DTC C0037 can only be set if the vehicle speed is greater than 8 km/h (5 mph), if the voltage supplied to terminals A and/or B is greater than 17 volts for 1 second.
Action Taken When the DTC Sets
| • | The solenoid relay opens, removing voltage from the solenoids and pump motor. |
| • | DTC C0037 is stored. |
| • | The antilock brake system (ABS) is disabled, ABS warning lamp turns ON. |
Conditions for Clearing the DTC
| • | If the conditions that set DTC C0037 is no longer present, the DTC may be cleared by using the proper scan tool. |
| • | The DTC that has not occurred in 100 drive cycles will be cleared from history data. |
Diagnostic Aids
Typical causes for DTC C0037 to set:
| • | Charging system malfunction |
| • | Poor connection |
| • | EBCM malfunction |
Step | Action | Values | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Diagnostic System Check-ABS? | -- | Go to Step 2 | |
2 |
Does the voltage measure less than the specified value? | 17 V | Go to Step 4 | Go to Step 3 |
3 |
Did you find and correct the condition? | -- | System OK | -- |
4 |
Does the voltage measure less than the specified value? | 17 V | Go to Step 6 | Go to Step 5 |
5 | Replace the EBCM. Did you complete the replacement? | -- | System OK | -- |
6 | The condition is intermittent. Refer to Diagnostic Aids. Did you find and correct the condition? | -- | System OK | -- |
