RX400h · Service Manual BRAKE

C1319/35

Diagnostic trouble codes

DESCRIPTION

The stroke simulator solenoid (SCSS) generates pedal reactive effort during ECB control. If one of the 4 wheels loses brake booster function, the stroke simulator operation is prohibited.
DTC No.
 INF Code
 DTC Detecting Condition
 Trouble Area
C1319/35
 71
  1. SCSS drive circuit is malfunctioning for 0.05 sec. or more.
  2. Short to +B in SCSS.
  1. Brake master stroke simulator assembly
  2. Wire harness and connector
  3. Skid control ECU
C1319/35
 72
 Current leaks for 0.05 sec. or more when SCSS is off.
  1. Brake master stroke simulator assembly
  2. Wire harness and connector
  3. Skid control ECU
C1319/35
 73
 Open circuit in SCSS continues for 0.05 sec. or more.
  1. Brake master stroke simulator assembly
  2. Wire harness and connector
  3. Skid control ECU
C1319/35
 74
 Open circuit in SCSS continues for 0.05 sec. or more.
  1. Brake master stroke simulator assembly
  2. Wire harness and connector
  3. Skid control ECU

WIRING DIAGRAM

C112004E03

INSPECTION PROCEDURE

NOTICE:
When replacing the skid control ECU, perform initialization of linear solenoid valve and calibration (Click here).


1. INSPECT BRAKE MASTER STROKE SIMULATOR CYLINDER ASSEMBLY

  1. F047498E02
    Disconnect the brake master stroke simulator cylinder assembly connector.

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

    Resistance:
    Tester Connection
    		 Specified Condition
    1 (BSR) - 2 (SCSS)
    		 21.45 to 23.15 Ω



NG
REPLACE BRAKE MASTER STROKE SIMULATOR CYLINDER ASSEMBLY
OK


2. CHECK HARNESS AND CONNECTOR (BETWEEN SKID CONTROL ECU AND STROKE SIMULATOR CYLINDER)

  1. F047498E04
    Connect the brake master stroke simulator cylinder assembly connector.

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

    HINT:
    Measure the voltage from the back side of the connector with the connector connected.

    Voltage:
    Tester Connection
    		 Condition
    		 Specified Condition
    B19-1 (BSR) - Body ground
    		 Ignition switch ON
    		 10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3. INSPECT SKID CONTROL ECU (SS TERMINAL)

  1. F047485E27
    Connect the intelligent tester to the DLC3.

  1. Select the ACTIVE TEST mode on the intelligent tester.

    Item
    		 Vehicle Condition / Test Details
    		 Diagnostic Note
    ECB Solenoid (SCSS)
    		 Stroke simulator cut valve pattern activation ON / OFF
    		 Operating of solenoid (clicking sound) can be heard

  1. Using the intelligent tester, turn the stroke simulator cylinder assembly ON/OFF.

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

    Voltage:
    Tester Connection
    		 Condition
    		 Specified Condition
    S41-13 (SS) - Body ground
    		 Brake Master Stroke Simulator Cylinder assembly ON
    		 Below 1.5 V
    S41-13 (SS) - Body ground
    		 Brake Master Stroke Simulator Cylinder assembly OFF
    		 10 to 14 V



NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

REPLACE SKID CONTROL ECU


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