Dtc Engine Control System Malfunction Description

Last Updated on Wed, 07 Nov 2018 | Toyota Sequoia 2007

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The circuit is used to send TRAC & 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 vehicle CAN and CAN1 communication system.

This DTC is output when the engine control system failure signal is received from the ECM.

DTC TROUBLE DETECTION CONDITION

DTC No.

DTC Detecting Condition

Trouble Area

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:

RESULT
DTC is not output	A
DTC (C1203 / 53) is output	B

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.

DTC TROUBLE DETECTION CONDITION
DTC No.	DTC Detecting Condition	Trouble Area
53	IG1 voltage is 8.5 V or more, and the condition that data from skid control ECU cannot be received continues for 5 sec. or more.	• VSC+, VSC- circuit (CAN1 communication system) • Skid control ECU • Translate ECU

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:

RESULT
DTC is not output	A
DTC (C1203/53) is output	B

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

The brake fluid level warning switch sends the appropriate signal to the translate ECU. This signal indicates a drop in brake fluid level. DTC TROUBLE DETECTION CONDITION
DTC No.	DTC Detecting Condition	Trouble Area
58	• Brake fluid level warning switch connector is disconnected for 1 sec. or more. • Brake fluid level warning switch is ON for 30 sec. or more.	• Brake fluid level warning switch circuit • Brake fluid level warning switch • Brake fluid reservoir level • Translate ECU

WIRING DIAGRAM

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

1. CHECK DTC

a. Check skid control ECU DTC.

RESULT: RESULT
DTC is not output	A
DTC (C1202 / 52) is output	B

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.

TESTER CONNECTION SPECIFIED CONDITION
Tester Connection	Switch Condition	Specified Condition
(B2-1) - (B2-2)	Float UP	10 kohms or more (No continuity)
(B2-1) - (B2-2)	Float DOWN	1 ohms or less (Continuity)

: 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

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