DTC 10

DIAGNOSTIC TROUBLE CODE 10,STOP LAMP SWITCH CIRCUIT

CIRCUIT DESCRIPTION:




A DTC 10 relates to the 12-volt signal in the stoplamp switch circuit. The EBCM uses this circuit to prepare for a possible antilock stop. The stoplamp switch closes when the brake pedal is released sending 12 volts to terminal F of the EBCM. Applying the brake pedal causes this signal to drop to less than 1 volt. When the EBCM sees this drop it gets ready to control the antilock pressure valve if necessary.

TEST DESCRIPTION:

Fig. 73 Code 10: Stop Lamp Switch Circuit:

- Check if voltage is available at the stoplamp switch.
- Check if voltage is getting through the stoplamp switch with the brake pedal released.
- Check if voltage is reaching terminal F and ground potential is available at terminal A.
- Check the operation of the stoplamp switch during actual driving conditions. This helps determine if the DTC is intermittent.

DIAGNOSTIC AIDS:

Important: Do not replace the EBCM or APV for this DTC. An EBCM or APV malfunction will not cause this DTC to set.

This DTC is set when the vehicle speed reaches 56 km/h (35 mph) or greater and there is no 12 volt signal from the stop lamp switch.
This DTC is a soft fault that turns on the "BRAKE" lamp until 12 volts is received from the stop lamp switch.
Do not pierce the electrical connectors, wires, seals, or insulation during testing. Doing so will break the seal and lead to corrosion and failure of the wiring and terminals.