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

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:

Pressure Control Solenoid "C" Actuator Stuck Off (P07957F)
SYSTEM DESCRIPTION The ECM uses the vehicle speed signal and signals from the transmission revolution sensors (NT, SP2) to detect the actual gear (1st, 2nd, 3rd, 4th, 5th or 6th gear). The ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems of t ...

Speedometer Malfunction
DESCRIPTION The meter CPU receives vehicle speed signals from the skid control ECU via the CAN communication system (CAN V1 Bus). The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU supplies power to the vehicle speed sensor ...

Transfer Shift Motor Control Circuit High (P17AA)
DESCRIPTION This DTC is output when a short to B+ in the transfer shift motor and A.D.D. shift motor drive circuit is detected. DTC No. Detection Item DTC Detection Condition Trouble Area P17AA Transfer Shift Motor Control C ...