Toyota 4Runner: Diagnosis System

Toyota 4Runner Service Manual / Vehicle Exterior / Lighting (ext) / Lighting System / Diagnosis System

DIAGNOSIS SYSTEM

1. DESCRIPTION

(a) Lighting system data and the Diagnostic Trouble Codes (DTCs) can be read from the Data Link Connector 3 (DLC3) of the vehicle. When the system seems to be malfunctioning, use the Techstream to check for malfunctions and to repair.

2. CHECK DLC3

(a) Check the DLC3 (See page ).

3. INSPECT BATTERY VOLTAGE

Standard voltage:

11 to 14 V

If the voltage is below 11 V, recharge or replace the battery before proceeding.

Terminals Of Ecu

TERMINALS OF ECU 1. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY, MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) (a) Remove the main body ECU (See page ). (b) Measure the resistance and voltage accor ...

Dtc Check / Clear

DTC CHECK / CLEAR 1. CHECK DTC (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 / (desired sy ...

Other materials about Toyota 4Runner:

Removal
REMOVAL PROCEDURE 1. REMOVE FRONT BUMPER COVER (w/o Intuitive Parking Assist System) (See page ) 2. REMOVE FRONT BUMPER COVER (w/ Intuitive Parking Assist System) (See page ) 3. REMOVE HIGH PITCHED HORN ASSEMBLY 4. REMOVE RADIATOR GRILLE BRACKET ...

Illumination Circuit
DESCRIPTION Power is supplied to the radio and display receiver assembly and steering pad switch illumination when the light control switch is in the tail or head position. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for c ...