Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: ECU Power Source Circuit

DESCRIPTION

The IG circuit is the power source for the tire pressure warning ECU and receiver.

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

NOTICE:

  • When replacing the tire pressure warning ECU and receiver, read the transmitter IDs stored in the old ECU using the Techstream and write them down before removal.
  • It is necessary to perform initialization (See page ) of the transmitter IDs into the tire ) after registration (See page pressure warning ECU and receiver if the ECU has been replaced. ) of the transmitter IDs into the tire pressure warning ECU and receiver if the ECU has been replaced.

HINT:

Inspect the fuses for circuits related to this system before performing the following procedure.

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (ECU - BATTERY AND BODYGROUND)

(a) Disconnect the T14*1, T25*2, T24*3 tire pressure warning ECU and receiver connector.

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

T14-1 (IG) - Body ground*1

T25-1 (IG) - Body ground*2

T24-1 (IG) - Body ground*3

Ignition switch ON

10 to 16 V

Ignition switch off

Below 1 V

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

T14-12 (GND) - Body ground*1

T25-12 (GND) - Body ground*2

T24-12 (GND) - Body ground*3

Always

Below 1 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Tire Pressure Warning ECU and Receiver)

  • *1: w/o Wireless Door Lock System
  • *2: w/o Smart Key System with Wireless Door Lock System
  • *3: w/ Smart Key System
OK

REPLACE TIRE PRESSURE WARNING ECU AND RECEIVER

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

No Signal from Transmitter ID1 (C2121/21-C2124/24,C2181/81-C2184/84)
DESCRIPTION The tire pressure warning valve and transmitters that are installed in the tire and wheel assemblies measure the tire pressure of each wheel. The measured values are transmitted to th ...

TC and CG Terminal Circuit
DESCRIPTION Tire pressure warning system DTCs can be checked by connecting terminals 13 (TC) and 4 (CG) of the DLC3. The DTCs are indicated by blinking the tire pressure warning light. WIRING DI ...

Other materials:

Installation
INSTALLATION PROCEDURE 1. INSTALL BRAKE PEDAL PAD (a) Install the brake pedal pad onto the brake pedal. 2. INSTALL BRAKE PEDAL SUPPORT ASSEMBLY (a) Install the brake pedal support assembly with 4 nuts. Torque: 14 N·m {145 kgf·cm, 10 ft·lbf} (b) Connect the stop light switch connector t ...

Removal
REMOVAL PROCEDURE 1. REMOVE TIMING CHAIN COVER ASSEMBLY (See page ) 2. SEPARATE NO. 2 WATER BY-PASS PIPE (for Vacuum Brake Booster) 3. REMOVE VACUUM PUMP ASSEMBLY (for Vacuum Brake Booster) 4. SET NO. 1 CYLINDER TO TDC/COMPRESSION 5. REMOVE NO. 1 CHAIN TENSIONER ASSEMBLY 6. REMO ...

How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT HINT: The ECM of this system is connected to the CAN communication system. Therefore, before starting troubleshooting, make sure to check that there is no trouble in the CAN and multiplex communication system. *: Use the Techstream. PROCEDURE ...

© 2011-2019 Copyright www.ttguide.net