Voltage to V Ng Check Power Source Circuit

Fig. 45: Checking Skid Control ECU Terminal Voltage OK: REPLACE SKID CONTROL ECU DTC C1201/51 ENGINE CONTROL SYSTEM MALFUNCTION DESCRIPTION

If trouble occurs in the engine control system, the ECM transmits the abnormality to the skid control ECU via translate ECU. The skid control ECU sets this DTC and the skid control ECU prohibits TRAC and VSC control.

DTC TROUBLE DETECTION CONDITION

DTC No.

DTC Detecting Condition

Trouble Area

C1201/51

Conditions 1. and 2. continue for 5 sec:

1. Engine speed: 500 rpm or more.

2. A trouble signal of the engine control system is input.

• Engine control system

INSPECTION PROCEDURE

INSPECTION PROCEDURE

2007 BRAKES Brake Control - Sequoia

1. CHECK ENGINE CONTROL SYSTEM

a. Check engine control system (See DTC CHECK / CLEAR ).

RESULT:

RESULT

DTC is not output

A

DTC is output

A: REPAIR ENGINE CONTROL SYSTEM

DTC C1202/52 BRAKE FLUID LEVEL LOW/ OPEN CIRCUIT IN BRAKE FLUID LEVEL WARNING SWITCH CIRCUIT

DESCRIPTION

The brake fluid level warning switch sends the appropriate signal to the skid control ECU when the brake fluid level drops.

A brake fluid level signal is transmitted from the translate ECU to the skid control ECU.

DTC TRO

UBLE DETECTION CONDITION

DTC No.

DTC Detecting Condition

Trouble Area

C1202/52

When any of the following conditions are detected:

1. Low fluid level condition in the brake master cylinder reservoir tank continues for 30 sec. or more when vehicle stops, or for 60 sec. or more when driving.

2. With ECU terminal IG1 voltage is 9.5 V to 17.2 V and open circuit for the brake fluid level warning switch circuit continues for 2 sec. or more.

• Brake fluid level

• Brake fluid level warning switch

• Brake fluid level warning switch circuit

• Skid control ECU

• CAN1 communication system

• Translate ECU

WIRING DIAGRAM

WIRING DIAGRAM

2007 BRAKES Brake Control - Sequoia

Fig. 46: Brake Fluid Level Low/ Open Circuit In Brake Fluid Level Warning Switch - Wiring Diagram INSPECTION PROCEDURE

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