Toyota Tacoma (2015-2018) Service Manual: Terminals Of Ecu

Toyota Tacoma (2015-2018) Service Manual / Seat / Seat Heater System / 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) in the table below.

HINT:

Measure the values on the wire harness side with the connector disconnected.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
A36-17 (B) - Body ground	LG - Body ground	Air conditioning amplifier power supply	Always	11 to 14 V
A36-1 (IG+) - Body ground	GR - Body ground	Air conditioning amplifier power supply	Ignition switch ON	11 to 14 V
A36-10 (GND) - Body ground	W-B - Body ground	Air conditioning amplifier ground	Always	Below 1 Ω

If the result is not as specified, there may be a malfunction on the wire harness side.

(d) Measure the voltage and resistance according to the value(s) in the table below.

(e) Check for pulse generation according to the value(s) in the table below.

Tester Connection	Wiring Color	Terminal Description	Condition	Specified Condition
A35-24 (SHP+) - Body ground	SB - Body ground	Seat heater (for Front Passenger Side) drive signal	Ignition switch ON Seat heater switch (for Front Passenger Side) on	Below 1 V
A35-23 (SHD+) - Body ground	R - Body ground	Seat heater (for Driver Side) drive signal	Ignition switch ON Seat heater switch (for Driver Side) on	Below 1 V
A36-11 (LIN1) - Body ground	SB - Body ground	Seat heater switch signal	Ignition switch ON	Pulse generation
A36-31 (TSR) - A35-15 (SG-2)	BE - P	Seat heater sensor (for Front Passenger Side) input signal	Ignition switch off (25°C [77°F])	10 kΩ
A36-32 (TSL) - A35-15 (SG-2)	V - P	Seat heater sensor (for Driver Side) input signal	Ignition switch off (25°C [77°F])	10 kΩ

2. CHECK AIR CONDITIONING CONTROL ASSEMBLY

(a) Check the air conditioning control assembly (See page Data List / Active Test ).

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 lis ...

Data List / Active Test

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Other materials:

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REMOVAL 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 ) 3. REMOVE TRANSFER POSITION SWITCH (a) Detach the 2 claws to remove the transfer pos ...

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Problem Symptoms Table
PROBLEM SYMPTOMS TABLE 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 ...