Toyota CH-R Service Manual: 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

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