Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual: Electric Parking Brake Actuator Supply Voltage Circuit Voltage Below Threshold (C13B516)

Lexus RX (RX 350L, RX450h) 2016-2022 Repair Manual / Brake / Parking Brake / Electric Parking Brake System / Electric Parking Brake Actuator Supply Voltage Circuit Voltage Below Threshold (C13B516)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C13B516

Electric Parking Brake Actuator Supply Voltage Circuit Voltage Below Threshold

  • Diagnosis Condition:

    Engine switch on (IG) or electric parking brake switch assembly pulled to lock side with engine switch off.

  • Malfunction Status:

    Voltage at terminal +BS is less than 5.4 V*

  • Detection Time:

    Approximately 0.5 seconds

HINT:

*: When the battery voltage is 12 V.

  • 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.

DTC Detection Conditions: C13B516
 

Vehicle Condition

Pattern 1

Pattern 2

Diagnosis Condition

Engine switch on (IG)

-

Electric parking brake switch assembly pulled to lock side with engine switch off

-

Malfunction Status

Voltage at terminal +BS is less than 5.4 V*

HINT:

*: When the battery voltage is 12 V.

Detection Time

Approximately 0.5 seconds

Approximately 0.5 seconds

Number of Trips

1 trip

1 trip

HINT:

DTC will be output when conditions for either of the patterns in the table above are met.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Inspect the fuses for circuits related to this system before performing the following procedure.
  • 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 (red) blinks when the engine switch is first turned on (IG).

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (+BS TERMINAL VOLTAGE)

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

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

Standard Voltage:

Tester Connection

Condition

Specified Condition

A41-14 (+BS) - Body ground

Always

11 to 14 V

*a

Front view of wire harness connector

(to Skid Control ECU (Brake Actuator Assembly))

OK

REPLACE SKID CONTROL ECU (BRAKE ACTUATOR ASSEMBLY)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

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    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Owners Manual

    Lexus RX (RX 350L, RX450h) 2016-{YEAR} Repair Manual

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