Toyota Service Blog

DTC No.

DTC Detecting Condition

Trouble Area

51

Translate ECU receives the engine control system failure signal from ECM for 5 sec. or more.

WIRING DIAGRAM

2007 BRAKES Brake Control - Sequoia

Fig. 24: Engine Control System Malfunction - Wiring Diagram INSPECTION PROCEDURE

1. CHECK DTC

a. Check skid control ECU DTC.

RESULT:

B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A: GO TO Next Step 2. CHECK HARNESS AND CONNECTOR

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE TRANSLATE ECU ASSEMBLY DTC 53 CAN1 COMMUNICATION MALFUNCTION DESCRIPTION

The circuit is used to send TRAC and VSC control information from the skid control ECU to the ECM, and engine control information from the ECM to the skid control ECU via the CAN communication system. This DTC is output when communication between the translate ECU and the skid control ECU is cut off.

WIRING DIAGRAM

WIRING DIAGRAM

2007 BRAKES Brake Control - Sequoia

Fig. 25: CAN1 Communication Malfunction - Wiring Diagram INSPECTION PROCEDURE

1. CHECK DTC

a. Check skid control ECU DTC.

RESULT:

2007 BRAKES Brake Control - Sequoia

B: REPAIR CIRCUITS INDICATED BY OUTPUT DTCS A: GO TO Next Step

2. CHECK HARNESS AND CONNECTOR

a. Disconnect the translate ECU connector.

b. Measure the resistance between the GND terminal and body ground. OK: Continuity

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig. 26: Disconnecting Translate ECU Connector OK: GO TO Next Step

3. REPLACE TRANSLATE ECU ASSEMBLY

a. Clear the translate DTC (See DTC CHECK / CLEAR ).

b. Turn the ignition switch OFF.

c. Turn the ignition switch to the ON position, and check if the same DTC is stored in the memory.

RESULT: RESULT

DTC 53 is not output A

DTC 53 is output

B: REPLACE SKID CONTROL ECU A: END

DTC 58 BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT DESCRIPTION

2007 BRAKES Brake Control - Sequoia

WIRING DIAGRAM

WIRING DIAGRAM

Fig. 27: Brake Fluid Level Warning Switch - Wiring Diagram INSPECTION PROCEDURE

1. CHECK DTC

a. Check skid control ECU DTC.

B: REPAIR CIRCUIT OPENING RELAY A: GO TO Next Step

2. INSPECT BRAKE FLUID LEVEL WARNING SWITCH

a. Disconnect the brake fluid level warning switch connector.

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

Fig. 28: Inspecting Brake Fluid Level Warning Switch NG: REPLACE BRAKE MASTER CYLINDER RESERVOIR SUB-ASSEMBLY OK: GO TO Next Step 3. CHECK HARNESS AND CONNECTOR

2007 BRAKES Brake Control - Sequoia