Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual: Right Electric Parking Brake Actuator Circuit Current Above Threshold (C061319)

Lexus RX (RX 350L, RX450h) 2016-2023 Repair Manual / Brake / Parking Brake / Electric Parking Brake System / Right Electric Parking Brake Actuator Circuit Current Above Threshold (C061319)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C061319

Right Electric Parking Brake Actuator Circuit Current Above Threshold

When the electric parking brake is operating, overcurrent is detected in the parking brake actuator assembly RH 3 times
  • Parking brake actuator assembly RH
  • No. 1 parking brake wire assembly
  • Wire harness and connector
  • Skid control ECU (brake actuator assembly)

DTC stored

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

WIRING DIAGRAM

Click here

CAUTION / NOTICE / HINT

NOTICE:

  • The electric parking brake may still operate up to 20 seconds after the engine switch is turned off. Before disconnecting connectors or fuses, turn the engine switch off and wait 20 seconds or more.
  • After replacing the skid control ECU (brake actuator assembly), perform "Calibration".

    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 blinks (red) when the engine switch is first turned on (IG).

PROCEDURE

1.

INSPECT NO. 1 PARKING BRAKE WIRE ASSEMBLY

(a) Make sure that there is no looseness at the locking part and the connecting part of the connectors.

OK:

The connector is securely connected.

(b) Disconnect the oR1 and o1 No. 1 parking brake wire assembly connectors.

(c) Check both the connector case and the terminals for deformation and corrosion.

OK:

No deformation or corrosion.

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

*a

Front view of No. 1 Parking Brake Wire Assembly

*b

(to wire harness connector)

*c

(to Parking Brake Actuator Assembly RH)

-

-

Standard Resistance:

Tester Connection

Condition

Specified Condition

oR1-1 - o1-2 (MRR+)

Always

Below 1 Ω

oR1-1 or o1-2 (MRR+) - Body ground and other terminals

Always

10 kΩ or higher

oR1-2 - o1-1 (MRR-)

Always

Below 1 Ω

oR1-2 or o1-1 (MRR-) - Body ground and other terminals

Always

10 kΩ or higher
NG

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY
OK

2.

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

(a) Make sure the No. 1 parking brake wire assembly is securely installed.

(b) Disconnect the A41 skid control ECU (brake actuator assembly) connector.

(c) Disconnect the o1 parking brake actuator assembly RH connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A41-13 (MRR+) - o1-2 (MRR+)

Always

Below 1 Ω

A41-13 (MRR+) or o1-2 (MRR+) - Body ground

Always

10 kΩ or higher

A41-12 (MRR-) - o1-1 (MRR-)

Always

Below 1 Ω

A41-12 (MRR-) or o1-1 (MRR-) - Body ground

Always

10 kΩ or higher
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

INSPECT PARKING BRAKE ACTUATOR ASSEMBLY RH

(a) Remove the parking brake actuator assembly RH.

Click here

(b) Inspect the parking brake actuator assembly RH.

Click here

NG

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY RH

OK

4.

CHECK FOR SHORT TO +B

(a) Turn the engine switch off.

(b) Make sure the No. 1 parking brake wire assembly is securely installed.

(c) Disconnect the o1 parking brake actuator assembly RH connector.

(d) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

o1-2 (MRR+) - o1-1 (MRR-)

Electric parking brake not operating

Below 1 V

*a

Front view of No. 1 Parking Brake Wire Assembly

(to Parking Brake Actuator Assembly RH)
OK

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY RH

NG

5.

CHECK FOR SHORT TO +B

(a) Disconnect the oR1 No. 1 parking brake wire assembly connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

oR1-1 - oR1-2

Electric parking brake not operating

Below 1 V

*a

Front view of wire harness connector

(to No. 1 Parking Brake Wire Assembly)
OK

REPLACE NO. 1 PARKING BRAKE WIRE ASSEMBLY
NG

6.

CHECK FOR SHORT TO +B

(a) Disconnect the oR1 No. 1 parking brake wire assembly connector.

(b) Disconnect the A41 skid control ECU (brake actuator assembly) connector.

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

*a

Front view of wire harness connector

*b

(to Skid Control ECU (Brake Actuator Assembly))

*c

(to No. 1 Parking Brake Wire Assembly)

-

-

Standard Voltage:

Tester Connection

Condition

Specified Condition

oR1-1 or A41-13 (MRR+) - Body ground

Always

Below 1 V

oR1-2 or A41-12 (MRR-) - Body ground

Always

Below 1 V
OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
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