Circuit Description
Ignition voltage is supplied through terminal A1 of the Electronic Brake Control Relay. The above condition enables the EBTCM to energize the pullin coil by completing the ground circuit at connector C1 terminal A11 of the EBTCM. The magnetic field created closes the Electronic Brake Control Relay contacts. The magnetic field also allows battery voltage and current through the Electronic Brake Control Relay terminal C1 to be supplied to the EBTCM through connector C2 terminal C and to the brake solenoid valves through S279.
Conditions for Setting the DTC
DTC C1217 can set before the EBTCM commands the Electronic Brake Control Relay on.
DTC C1217 determines if the Electronic Brake Control Relay energizes when the Electronic Brake Control Relay should not energize. The above malfunction would not allow the Electronic Brake Control Relay to remove power to the ABS/ETS system.
If a second malfunction occurs, that requires the Electronic Brake Control Relay to turn off, the second malfunction cannot be removed if the Electronic Brake Control Relay cannot be controlled.
Action Taken When the DTC Sets
| • | A malfunction DTC stores. |
| • | The ABS/ETS does not disable. |
Conditions for Clearing the DTC
| • | The condition responsible for setting the DTC no longer exists and the Scan Tool Clear DTCs function is used. |
| • | 100 drive cycles pass with no DTCs detected. |
Diagnostic Aids
Many conditions may cause an intermittent malfunction. Proper use of the scan tool enhanced diagnostic function can be used in order to measure the frequency of the fault. Thoroughly inspect any circuitry that may be causing the intermittent complaint for the following conditions:
| • | Backed out terminals |
| • | Improper mating |
| • | Improperly formed or damaged terminals |
| • | Poor terminal-to-wiring connections |
| • | Rubbed-through wire insulation |
| • | A broken wire inside the insulation |
Clear all of the DTCs after completing the diagnosis. Test drive the vehicle for three drive cycles in order to verify that the DTC does not reset. Use the following procedure in order to complete one drive cycle:
- Start the vehicle.
- Drive the vehicle over 16 km/h (10 mph).
- Stop the vehicle.
- Turn the ignition to the OFF position.
Step | Action | Value(s) | Yes | No | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
1 | Was the Diagnostic System Check performed? | -- | ||||||||||||
2 |
Do not start the engine. Does the scan tool indicate that the Electronic Brake Control (ABS) Relay is off? | -- | Go to Diagnostic Aids | |||||||||||
3 |
Do not start the engine. Is the voltage less than the specified voltage? | 10 V | ||||||||||||
4 |
Are there signs of poor terminal contact, corrosion, or damaged terminals? | -- | ||||||||||||
5 | Use the J 39200 to measure the resistance between the 24-way EBTCM connector C1 terminal A11 and ground. Is the resistance within the specified range? | OL (Infinite) | ||||||||||||
6 |
Do not start the engine. Does DTC C1217 set as a current DTC? | -- | Go to Diagnostic Aids | |||||||||||
7 |
Is the voltage less than or equal to the specified range? | 0-2 V | ||||||||||||
8 | Replace all of the terminals or connectors that exhibit signs of poor terminal contact, corrosion, or damaged terminals. Is the repair complete? | -- | -- | |||||||||||
9 | Repair the short to ground in CKT 1632. Is the repair complete? | -- | -- | |||||||||||
10 | Replace the Electronic Brake Control Relay. Refer to Electronic Brake Control Relay Replacement . Is the repair complete? | -- | -- | |||||||||||
11 | Replace the EBTCM. Refer to Electronic Brake and Traction Control Module Replacement . Is the repair complete? | --> | -- |
