Toyota Corolla Cross Owners & Service Manuals

Toyota Corolla Cross: Electric Parking Brake Switch Signal Compare Failure (C060962)

DESCRIPTION

When the electric parking brake switch is pulled, a lock request signal is sent from the skid control ECU (brake actuator assembly) to the parking brake actuator assembly. When the electric parking brake switch is pushed, a release request signal is sent from the skid control ECU (brake actuator assembly) to the parking brake actuator assembly.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C060962

Electric Parking Brake Switch Signal Compare Failure

  • Open or short detected in parking brake switch circuit for 1 second or more
  • Stuck parking brake switch detected (when parked: 30 seconds, when driving: 1 second, during initial stall: 1 second)
  • Stuck parking brake switch detected 3 times in succession when being operated
  • Electric parking brake switch (electric parking brake switch assembly)
  • Wire harness or connector
  • Skid control ECU (brake actuator assembly)

DTC stored

An electric parking brake system malfunction is displayed on the multi-information display.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • If the electric parking brake switch is held near the lock position but not fully in the lock position for 1 second or more, a DTC may be stored due to one of the two contacts being ON while the other is OFF. (This is not a system malfunction.)
  • The electric parking brake may still operate up to 20 seconds after the ignition switch is turned off. Before disconnecting connectors or fuses, turn the ignition switch off and wait 20 seconds or more.
  • After replacing the skid control ECU (brake actuator assembly), perform acceleration sensor zero point calibration and store system information memorization.

    Click here

  • When replacing the skid control ECU (brake actuator assembly), operate the electric parking brake switch (electric parking brake switch assembly) as the parking brake indicator light (red) blinks when the ignition switch is first turned ON.

PROCEDURE

1.

READ VALUE USING GTS (EPB SWITCH)

(a) Operate the electric parking brake switch (electric parking brake switch assembly) and check that the value of "EPB Switch" in the Data List changes between Lock and Release in accordance with the operation of the switch.

Chassis > Brake/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

EPB Switch

Electric parking brake switch (electric parking brake switch assembly) input

OFF / Lock / Release / Unknown

OFF: Lock switch and release switch are off

Lock: Lock switch on

Release: Release switch on

When not normal, electric parking brake switch (electric parking brake switch assembly) release side system may be malfunctioning

HINT:

EPB stands for electric parking brake.

Chassis > Brake/EPB > Data List

Tester Display

EPB Switch

(b) Check the mode condition on the GTS changes according to electric parking brake switch (electric parking brake switch assembly) operation.

OK:

The value of EPB Switch changes between Lock and Release in accordance with switch operation.

NG

GO TO STEP 4

OK

2.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

NEXT

3.

CHECK DTC

(a) Check for DTCs.

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

DTCs are output

A

DTCs are not output

B

A

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

B

USE SIMULATION METHOD TO CHECK

4.

INSPECT ELECTRIC PARKING BRAKE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)

Click here

NG

REPLACE ELECTRIC PARKING BRAKE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY)

OK

5.

CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY) - ELECTRIC PARKING BRAKE SWITCH (ELECTRIC PARKING BRAKE SWITCH ASSEMBLY))

(a) Disconnect the I257 electric parking brake switch (electric parking brake switch assembly) connector.

(b) Disconnect the A151 skid control ECU (brake actuator assembly) connector.

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

A151-31 (SWI1) - I257-7 (SWI1)

Always

Below 1 Ω

A151-32 (SWO1) - I257-8 (SWO1)

Always

Below 1 Ω

A151-15 (SWI2) - I257-1 (SWI2)

Always

Below 1 Ω

A151-16 (SWO2) - I257-2 (SWO2)

Always

Below 1 Ω

A151-31 (SWI1) or I257-7 (SWI1) - Body ground

Always

10 kΩ or higher

A151-32 (SWO1) or I257-8 (SWO1) - Body ground

Always

10 kΩ or higher

A151-15 (SWI2) or I257-1 (SWI2) - Body ground

Always

10 kΩ or higher

A151-16 (SWO2) or I257-2 (SWO2) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

CLEAR DTC

(a) Clear the DTCs.

Chassis > Brake/EPB > Clear DTCs

(b) Turn the ignition switch off.

NEXT

7.

CHECK DTC

(a) Check for DTCs.

Chassis > Brake/EPB > Trouble Codes

Result

Proceed to

DTCs are output

A

DTCs are not output

B

A

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

B

USE SIMULATION METHOD TO CHECK

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