Lexus NX manuals

Lexus NX: Open Circuit in Power Source Circuit (C13A0,C13A5,C13B0)

Lexus NX Service Manual / Brake / Parking Brake / Electric Parking Brake System / Open Circuit in Power Source Circuit (C13A0,C13A5,C13B0)

DESCRIPTION

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

Memory

Note

C13A0

Open Circuit in Power Source Circuit

Both of following conditions are met:

  • Power switch on (IG) or electric parking brake switch (integration control and panel assembly) pulled to lock side with power switch off.
  • Parking brake ECU assembly's power source relay is open for approx. 0.5 sec.
  • Parking brake actuator assembly
  • Parking brake ECU assembly

Yes

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

C13A5

Electric Current of Motor

Both of following conditions are met:

  • Power switch on (IG) or electric parking brake switch (integration control and panel assembly) pulled to lock side with power switch off.
  • Parking brake ECU assembly's internal current is abnormal for approximately 0.1 to 0.5 seconds (differs according to malfunction contents).
  • Parking brake actuator assembly
  • Parking brake ECU assembly

Yes

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

C13B0

Electric Parking Brake ECU Malfunction

Both of following conditions are met:

  • Power switch on (IG) or electric parking brake switch (integration control and panel assembly) pulled to lock side with power switch off.
  • Internal current of parking brake ECU assembly or ECU components abnormal for a maximum of 60 seconds (differs according to malfunction contents).
  • Parking brake actuator assembly
  • Parking brake ECU assembly

Yes

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

CAUTION / NOTICE / HINT

NOTICE:

When replacing the parking brake ECU assembly, operate the electric parking brake switch (integration control and panel assembly), as the parking brake indicator light (red) blinks when the power switch is first turned on (IG).

PROCEDURE

1.

INSPECT PARKING BRAKE ACTUATOR ASSEMBLY

(a) Inspect the parking brake actuator assembly.

Click here

NG

REPLACE PARKING BRAKE ACTUATOR ASSEMBLY

OK

2.

REPLACE PARKING BRAKE ECU ASSEMBLY

(a) Replace parking brake ECU assembly.

Click here

NEXT

END

READ NEXT:

 Short Circuit in Power Source Circuit (C13A1)

DESCRIPTION The following DTCs are stored when a malfunction occurs in the parking brake ECU assembly. DTC No. Detection Item DTC Detection Condition Trouble Area Memory Note C13A1

 Engine Switch/Power Switch Malfunction (C13A2)

DESCRIPTION When the power switch is turned on (IG), power is supplied to the parking brake ECU assembly. This DTC is stored if the IG power source is not input to the parking brake ECU assembly when

 Open or Short Circuit in Lock Switch Circuit (C13A3,C13AB)

DESCRIPTION When the electric parking brake switch (integration control and panel assembly) is pulled to the lock side, a lock request signal is output to the parking brake ECU assembly. DTC No.

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 Lost Communication with Clock Device (Local-CAN) (B1326)

DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area Memory B1326 Lost Communication with Clock Device (Local-CAN) After the radio receiver assembly receives a registration information signal, which is sent by the clock assembly when the power switch is turned o

 Inspection

INSPECTION PROCEDURE 1. INSPECT COOLER THERMISTOR (ROOM TEMPERATURE SENSOR) (a) Measure the resistance according to the value(s) in the table below. Standard Resistance: Tester Connection Condition Specified Condition 1 - 2 10°C (50°F) 3.00 to 3.73 kΩ 15°C (59°F) 2.45 t

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