Toyota Tacoma 2015-2018 Service Manual: On-vehicle Inspection
1. INSPECT INDICATOR LIGHT
(a) Inspect the 4HI Indicator Light:
(1) Start the engine.
(2) Change the 4WD control switch from 2WD to 4H.
(3) Check the 4HI indicator light.
The 4HI indicator light comes on or the 4HI indicator light comes on after it is blinking.
If the result is not as specified, inspect the switch, four wheel drive control ECU and transfer shift actuator assembly. If there is a malfunction, inspect the switch, ECU, transfer shift actuator and A.D.D. actuator. If the system is normal, there may be a malfunction in the CAN communication system or combination meter. In this case, first check the CAN communication system (See page ). Then check the combination meter (See page) and touch select 2- 4 and high-low system (See page).
(b) Inspect the 4LO Indicator Light:
(1) Start the engine.
(2) Move the shift lever to N.
(3) Change the 4WD control switch from 2WD to 4H. Then change it from 4H to 4L after the 4HI indicator light illuminates (after 4H switch completion).
(4) Check the 4LO indicator light.
The 4LO indicator light comes on or the 4LO indicator light comes on after it is blinking.
If there is a malfunction, inspect the switch, ECU and actuator. If the system is normal, the combination meter may be malfunctioning.
2. INSPECT TRANSFER POSITION SWITCH
(a) Remove the transfer position switch with its connector still connected (See page).
(b) Measure the voltage according to the value(s) in the table below.
RemovalREMOVAL PROCEDURE 1. REMOVE AIR CONDITIONING CONTROL ASSEMBLY (for Automatic Air Conditioning System) (See page ) 2. REMOVE INTEGRATION PANEL SUB-ASSEMBLY (for Manual Cooler System) (See page ...
Terminals Of Ecu
TERMINALS OF ECU 1. CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND DRIVER SIDE JUNCTION BLOCK (a) Remove the main body ECU (multiplex network body ECU) from the driver side junction block (See page ). (b) Disconnect the 1D driver side junction block connector. (c) Measure the voltag ...
Front Fog Light Circuit
DESCRIPTION The main body ECU (multiplex network body ECU) controls the front fog lights. WIRING DIAGRAM CAUTION / NOTICE / HINT NOTICE: Inspect the fuses for circuits related to this system before performing the following inspection procedure.