C1346

BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1247/47, C1346/71, C1392/48: Stroke Sensor Malfunction
C1392/48 - Stroke Sensor Zero Point Calibration Undone

DESCRIPTION

The brake pedal stroke sensor assembly sends a signal about the pedal stroke to the skid control ECU.

DTC C1346/71 will be cleared when the brake pedal stroke sensor assembly sends a brake pedal stroke sensor assembly signal or when Test Mode ends. DTC C1346/71 is output only in Test Mode.





WIRING DIAGRAM





INSPECTION PROCEDURE

NOTICE:
When replacing the skid control ECU (brake booster with master cylinder assembly) or brake pedal stroke sensor assembly, perform initialization and calibration of the linear solenoid valve Initialization.

HINT
Check the condition of each related circuit connector before troubleshooting Electronic Circuit Inspection Procedure.

PROCEDURE

1. CHECK BRAKE PEDAL

(a) Check that the brake pedal and the brake pedal stroke sensor assembly are properly installed and that the pedal can be depressed normally.

(b) Check and adjust the brake pedal height Adjustments.

(c) Adjust the brake pedal stroke sensor assembly Installation.

NEXT -- Continue to next step.

2. CHECK HARNESS AND CONNECTOR (SKID CONTROL ECU - BRAKE PEDAL STROKE SENSOR ASSEMBLY)

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

(b) Disconnect the skid control ECU (brake booster with master cylinder assembly) connector and the brake pedal stroke sensor assembly connector.

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

OK:

No deformation or corrosion.

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

Standard Resistance:





NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- Continue to next step.

3. INSPECT SKID CONTROL ECU (SENSOR OUTPUT)

(a) Reconnect the skid control ECU (brake booster with master cylinder assembly) connector.





(b) Turn the power switch on (IG).

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

Standard Voltage:





Text in Illustration





NG -- REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY Removal

OK -- REPLACE BRAKE PEDAL STROKE SENSOR ASSEMBLY Removal