Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: 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

(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.

(c) Reconnect the A36 air conditioning amplifier assembly connector.

(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
DATA LIST / ACTIVE TEST 1. DATA LIST HINT: Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any p ...

Other materials:

Precaution
PRECAUTION PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL NOTICE: When disconnecting the cable from the negative (-) battery terminal, initialize the following systems after the cable is reconnected. Click here IGNITION SWITCH EXPRESSIONS (a) The type of ignition switch ...

Theft deterrent system
Engine immobilizer system The vehicle’s keys have built-in transponder chips that prevent the engine from starting if the key has not been previously registered in the vehicle’s on-board computer. Never leave the keys inside the vehicle when you leave the vehicle. The indicator light fl ...

AVC-LAN Circuit
DESCRIPTION Each unit of the navigation system connected to the AVC-LAN (communication bus) transfers the switch signals using the AVC-LAN. If a short to +B or short to ground occurs in the AVC-LAN, the navigation system will not function normally because communication is not possible. WIRING ...

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