Toyota 4Runner: Diagnosis System

Toyota 4Runner Service Manual / Steering / Power Assist Systems / Power Steering System / Diagnosis System

DIAGNOSIS SYSTEM

1. CHECK DLC3

(a) Check the DLC3 (See page ).

2. FUNCTION OF POWER STEERING WARNING LIGHT

(a) When a malfunction is detected in the power steering system, the power steering warning light in the combination meter comes on to inform the driver of the malfunction.

HINT:

When power assist is stopped or reduced, the power steering warning light comes on.

Power assist is stopped:

When a malfunction occurs in the power steering system (including lost CAN communication, etc.)
When the engine stalls (not a malfunction)

Power assist is reduced:

When a malfunction occurs in the power steering system (including lost CAN communication, etc.)

Terminals Of Ecu

TERMINALS OF ECU 1. CHECK POWER STEERING ECU ASSEMBLY (a) Measure the voltage and resistance according to the value(s) in the table below. Terminal No. (Symbol) Wiring Col ...

Dtc Check / Clear

DTC CHECK / CLEAR 1. CHECK DTC (a) Turn the ignition switch off. (b) Connect the Techstream to the DLC3. (c) Turn the ignition switch to ON. (d) Turn the Techstream on. (e) Enter the following m ...

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FREEZE FRAME DATA 1. CHECK FREEZE FRAME DATA (a) Connect the Techstream to the DLC3. (b) Turn the ignition switch to ON. (c) Turn the Techstream on. (d) Enter the following menus: Body Electrical / Navigation System / Trouble Codes. (e) Select a DTC to ...