Toyota Tacoma (2015-2018) Service Manual: Problem Symptoms Table

Toyota Tacoma (2015-2018) Service Manual / Seat / Seat Heater System / Problem Symptoms Table

PROBLEM SYMPTOMS TABLE

HINT:

Use the table below to help determine the cause of problem symptoms. If multiple suspected areas are listed, the potential causes of the symptoms are listed in order of probability in the "Suspected Area" column of the table. Check each symptom by checking the suspected areas in the order they are listed. Replace parts as necessary.
Inspect the fuses and relays related to this system before inspecting the suspected areas below.

Seat Heater System

Symptom	Suspected Area	See page
Seat heater does not operate for driver side and front passenger side seat	Harness and connector	-
	Air conditioning control assembly
	Air conditioning amplifier assembly
Front seat heater does not operate (for driver)	Driver side seat heater does not operate
	Air conditioning control assembly
	Front seat cushion heater assembly LH
	Front seatback heater assembly LH
	Wire harness or connector	-
Front seat heater does not operate (for front passenger)	Front passenger side seat heater does not operate
	Air conditioning control assembly
	Front seat cushion heater assembly RH
	Front seatback heater assembly RH
	Wire harness or connector	-

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 / Air Conditi ...

Terminals Of Ecu

TERMINALS OF ECU 1. CHECK AIR CONDITIONING AMPLIFIER ASSEMBLY (a) Disconnect the A36 air conditioning amplifier assembly connector. (b) Measure the voltage and resistance according to the value(s ...

Other materials:

If the vehicle becomes stuck
Carry out the following procedures if the tires spin or the vehicle becomes stuck in mud, dirt, or snow. Stop the engine. Set the parking brake and put the shift lever in P (vehicles with an automatic transmission) or N (vehicles with a manual transmission). Remove the mud, snow, or sand f ...

Operation Check
OPERATION CHECK 1. MALFUNCTION DISPLAY (MULTI-INFORMATION DISPLAY) (a) Open circuit indication (1) If there is an open circuit between a No. 1 ultrasonic sensor and the clearance warning ECU assembly or a sensor is malfunctioning, the malfunction is displayed as shown in the illustration. ...

Transfer L4 Position Switch Circuit (C1268)
DESCRIPTION DTC No. Detection Item DTC Detection Condition Trouble Area C1268 Transfer L4 Position Switch Circuit Either of the following is detected: The skid control ECU (brake actuator assembly) dete ...