Toyota CH-R Service Manual: Actuator Malfunction (C13A7)

Toyota CH-R Service Manual / Parking Brake / Electric Parking Brake System / Actuator Malfunction (C13A7)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C13A7

Actuator Malfunction

When the electric parking brake is operating, motor lock, gear lock, motor spinning or repeated slipping occurs.
  • Parking brake actuator assembly
  • Rear brake
  • Wire harness or connector

DTC stored

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

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

NOTICE:

  • This DTC may be stored when the system changes to pad replacement mode, but this is not a malfunction.
  • This DTC may be stored when the parking brake is forcibly released, but this is not a 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.
  • 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 DTC

(a) Check for DTCs.

Click here

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

Result

Proceed to

Only DTC C13A7 is output

A

DTCs other than C13A7 are output

B
B

GO TO DIAGNOSTIC TROUBLE CODE CHART

A

2.

READ VALUE USING TECHSTREAM (PERMISSION OF RH INTERLOCKING PKB LOCK / PERMISSION OF LH INTERLOCKING PKB LOCK)

(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.

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

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

Permission of RH Interlocking PKB Lock

Parking brake actuator assembly RH parking brake lock control permission status

OK or NG

-

-

Permission of LH Interlocking PKB Lock

Parking brake actuator assembly LH parking brake lock control permission status

OK or NG

-

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

Tester Display

Permission of RH Interlocking PKB Lock

Permission of LH Interlocking PKB Lock
NEXT

3.

INSPECT PARKING BRAKE WIRE ASSEMBLY

*a

Front view of Parking Brake Wire Assembly

*b

(to wire harness connector)

*c

(to Parking Brake Actuator Assembly)

*d

for RH

*e

for LH

-

-

(a) Remove the parking brake wire assembly.

Click here

(b) Check the parking brake wire assembly for damage.

OK:

No damage.

HINT:

If damaged, there may be a short in the wire harness or a short to ground.

(c) Inspect the parking brake wire assembly.

Standard Resistance:

for RH

Tester Connection

Condition

Specified Condition

dM3-2 (MRR-) - d2-1 (MRR-)

Always

Below 1 Ω

dM3-2 (MRR-) - d2-2 (MRR+)

Always

10 kΩ or higher

dM3-2 (MRR-) or d2-1 (MRR-) - Body ground

Always

10 kΩ or higher

dM3-1 (MRR+) - d2-2 (MRR+)

Always

Below 1 Ω

dM3-1 (MRR+) - d2-1 (MRR-)

Always

10 kΩ or higher

dM3-1 (MRR+) or d2-2 (MRR+) - Body ground

Always

10 kΩ or higher
for LH

Tester Connection

Condition

Specified Condition

eM3-2 (MRL-) - e2-1 (MRL-)

Always

Below 1 Ω

eM3-2 (MRL-) - e2-2 (MRL+)

Always

10 kΩ or higher

eM3-2 (MRL-) or e2-1 (MRL-) - Body ground

Always

10 kΩ or higher

eM3-1 (MRL+) - e2-2 (MRL+)

Always

Below 1 Ω

eM3-1 (MRL+) - e2-1 (MRL-)

Always

10 kΩ or higher

eM3-1 (MRL+) or e2-2 (MRL+) - Body ground

Always

10 kΩ or higher
NG

REPLACE PARKING BRAKE WIRE ASSEMBLY

OK

4.

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

(a) Turn the ignition switch off.

(b) Make sure the parking brake wire assembly is securely installed.

(c) Disconnect the A42 skid control ECU (brake actuator assembly) connector.

(d) Disconnect the d2*1 or e2*2 parking brake actuator assembly connector.

  • *1: for RH
  • *2: for LH

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

Standard Resistance:

for RH

Tester Connection

Condition

Specified Condition

A42-2 (MRR+) - d2-2 (MRR+)

Always

Below 1 Ω

A42-3 (MRR-) - d2-1 (MRR-)

Always

Below 1 Ω

A42-2 (MRR+) or d2-2 (MRR+) - Body ground

Always

10 kΩ or higher

A42-3 (MRR-) or d2-1 (MRR-) - Body ground

Always

10 kΩ or higher
for LH

Tester Connection

Condition

Specified Condition

A42-13 (MRL+) - e2-2 (MRL+)

Always

Below 1 Ω

A42-12 (MRL-) - e2-1 (MRL-)

Always

Below 1 Ω

A42-13 (MRL+) or e2-2 (MRL+) - Body ground

Always

10 kΩ or higher

A42-12 (MRL-) or e2-1 (MRL-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

5.

INSPECT REAR BRAKE AND PARKING BRAKE ACTUATOR ASSEMBLY

(a) Enter rear brake pad replacement mode.

Click here

(b) Turn the ignition switch off.

(c) Check that the rotating parts are not seized or the actuator is not spinning freely.

(1) Check that the parking brake actuator assembly is installed properly to the rear brake caliper and that it is not spinning freely.

For the parking brake actuator assembly removal procedure: Click here

(2) Check that there is no damage to the rotating parts from the parking brake actuator assembly to the rear brake caliper.

(3) Inspect the parking brake actuator assembly and check that it operates correctly.

Click here

(4) Check that the rear brake caliper threaded part rotates and that the rear disc brake piston moves outward.

HINT:

For the check procedures, refer to the parking brake forced release method when not using the Techstream.

  • for TMC Made

    Click here

  • for TMMT Made

    Click here

HINT:

Return to normal mode after work is complete.

Click here

OK

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY

NG

REPAIR OR REPLACE NECESSARY PARTS
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    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 el ...

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