Toyota CH-R Service Manual: Electric Parking Brake AUTO Indicator Light Circuit

Toyota CH-R Service Manual / Parking Brake / Electric Parking Brake System / Electric Parking Brake AUTO Indicator Light Circuit

DESCRIPTION

Pulling the electric parking brake switch to the lock side for 5 seconds or more changes the AUTO function (shift-linked function) to ON, and an AUTO Mode ON message is displayed on the multi-information display in the combination meter.

Pressing the electric parking brake switch to the release side for 5 seconds or more changes the AUTO function (shift-linked function) to OFF, and an AUTO Mode OFF message is displayed on the multi-information display in the combination meter.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following inspection procedure.
  • 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.
  • 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 to ON.

PROCEDURE

1.

CHECK CAN COMMUNICATION SYSTEM

(a) Check if CAN communication system DTCs are output.

Click here

Result

Proceed to

DTCs are not output

A

DTCs are output

B

B

GO TO CAN COMMUNICATION SYSTEM

A

2.

READ VALUE USING TEACHSTREAM (AUTO MODE)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON and the Techstream on.

(d) Enter the following menus: Chassis / Electric Parking Brake / Data List.

(e) Check the values by referring to the table below.

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Auto Mode

AUTO (shift-linked) mode permission display

OFF or ON

OFF: Manual mode

ON: AUTO (shift-linked) mode

-

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display

Auto Mode

(f) When switching the mode, check that the Data List display turns on and off.

Result

Proceed to

AUTO indicator light does not illuminate and turn off according to turning Active Test on and off

A

AUTO indicator light illuminates and turns off according to turning Active Test on and off

B

B

GO TO STEP 6

A

3.

CHECK DTC

(a) Check for DTCs.

Click here

Chassis > ABS/VSC/TRAC/EPB > Trouble Codes

Result

Proceed to

DTC is not output

A

DTC is output

B

B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

4.

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

(a) Inspect the 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 F67 electric parking brake switch (electric parking brake switch assembly) connector.

(b) Disconnect the A42 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

A42-31 (SWI1) - F67-6 (SWI1)

Always

Below 5 Ω

A42-32 (SWO1) - F67-5 (SWO1)

Always

Below 5 Ω

A42-15 (SWI2) - F67-4 (SWI2)

Always

Below 5 Ω

A42-16 (SWO2) - F67-3 (SWO2)

Always

Below 5 Ω

A42-31 (SWI1) or F67-6 (SWI1) - Body ground

Always

10 kΩ or higher

A42-32 (SWO1) or F67-5 (SWO1) - Body ground

Always

10 kΩ or higher

A42-15 (SWI2) or F67-4 (SWI2) - Body ground

Always

10 kΩ or higher

A42-16 (SWO2) or F67-3 (SWO2) - Body ground

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

OK

6.

PERFORM ACTIVE TEST USING TECHSTREAM (AUTO MODE)

(a) Turn the ignition switch off.

(b) Connect the Techstream to the DLC3.

(c) Turn the ignition switch to ON.

(d) Turn the Techstream on.

(e) Enter the following menus: Chassis / Electric Parking Brake / Data List.

(f) Read the Data List according to the display on the Techstream.

Click here

Chassis > ABS/VSC/TRAC/EPB > Active Test

Tester Display

Measurement Item

Control Range

Diagnostic Note

Auto Mode

AUTO (shift-linked) mode

ON or OFF

  • Vehicle stopped
  • Ignition switch ON
Chassis > ABS/VSC/TRAC/EPB > Active Test

Tester Display

Auto Mode

(g) Select the Data List on the Techstream.

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Auto Mode

AUTO (shift-linked) mode permission display

ON or OFF

ON: AUTO (shift-linked) mode

OFF: Manual mode

-

Chassis > ABS/VSC/TRAC/EPB > Data List

Tester Display

Auto Mode

(h) Perform the Auto Mode Active Test, and check that the Data List display changes.

Result

Proceed to

Check the operating condition of the "Auto Mode" when operating it using the Techstream.

A

"Auto Mode" in the Data List turns ON/OFF using the Active Test.

B

A

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

B

7.

INSPECT COMBINATION METER ASSEMBLY

(a) Perform the Active Test of the combination meter assembly using the Techstream. (for CVT)

Click here

Body Electrical > Combination Meter > Active Test

Tester Display

Meter Display 1

(b) Check the multi-information display the combination meter assembly turn ON or OFF in accordance with the Techstream operation.

OK:

The message in the multi-information display appears and disappears in accordance with the Active Test operation.

OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

NG

GO TO METER / GAUGE SYSTEM

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