Toyota Tacoma manuals

Toyota Tacoma 2015-2018 Service Manual: Combination Meter ECU Communication Stop Mode

Toyota Tacoma 2015-2018 Service Manual / Can Communication / Can Communication System / Combination Meter ECU Communication Stop Mode

DESCRIPTION

Detection Item

Symptom

Trouble Area

Combination Meter ECU Communication Stop Mode

Either condition is met:

  • Communication stop for "Combination Meter" is indicated on the "Communication Bus Check" screen of the Techstream.

    Click here

  • Communication system DTCs (DTCs that start with U) that correspond to "Combination Meter ECU Communication Stop Mode" in "DTC Combination Table" are output.

    Click here

  • Combination meter assembly main line or connector
  • Power source circuit of combination meter assembly
  • Combination meter assembly ground circuit
  • Combination meter assembly

WIRING DIAGRAM

CAUTION / NOTICE / HINT

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

  • Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.

    Click here

  • Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
  • After turning the ignition switch off, waiting time may be required before disconnecting the cable from the negative (-) battery terminal. Therefore, make sure to read the disconnecting the cable from the negative (-) battery terminal notices before proceeding with work.

    Click here

  • Some parts must be initialized and set when replacing or removing and installing parts.

    Click here

  • After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.

    DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.

  • After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.

    Click here

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

HINT:

  • Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
  • When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.

CHECK FOR OPEN IN CAN BUS LINES (COMBINATION METER ASSEMBLY MAIN LINE)

(a) Disconnect the cable from the negative (-) battery terminal.

(b) Disconnect the combination meter assembly connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C9-1 (CANH) - C9-2 (CANL)

Cable disconnected from negative (-) battery terminal

108 to 132 Ω

Text in Illustration

*a

Front view of wire harness connector

(to Combination Meter Assembly)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (COMBINATION METER ASSEMBLY MAIN LINE)

OK

2.

CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C9-18 (ES) - Body ground

Cable disconnected from negative (-) battery terminal

Below 1 Ω

(b) Connect the cable to the negative (-) battery terminal.

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

Standard Voltage:

Tester Connection

Switch Condition

Specified Condition

C9-20 (IG+) - Body ground

Ignition switch ON

11 to 14 V

C9-19 (B) - Body ground

Always

11 to 14 V

Text in Illustration

*a

Front view of wire harness connector

(to Combination Meter Assembly)

OK

REPLACE COMBINATION METER ASSEMBLY

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)

Certification ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area Certification ECU Communication Stop Mode Either condition is met: Communica ...

4WD Control ECU Communication Stop Mode
DESCRIPTION Detection Item Symptom Trouble Area 4WD Control ECU Communication Stop Mode Either condition is met: Communicati ...

Other materials:

Terminals Of Ecm
TERMINALS OF ECM 1. ECM HINT: The standard voltage between each pair of ECM terminals is shown in the table below. In the table, first follow the information under "Condition". Look under "Terminal No. (Symbol)" for the terminals to be inspected. The standard voltage b ...

Abnormal Change in Output Signal of Rear Speed Sensor RH (Test Mode DTC) (C1277,...,C1416)
DESCRIPTION Refer to DTCs C1401 and C1402 (See page ). DTC Code DTC Detection Condition Trouble Area C1277 C1278 Stored only during test mode. Rear speed sensor RH/LH Rear speed sensor rotor RH/LH (Rear ax ...

Removal
REMOVAL PROCEDURE 1. REMOVE INSTRUMENT PANEL SUB-ASSEMBLY (See page ) 2. REMOVE NO. 3 HEATER TO REGISTER DUCT 3. REMOVE INSTRUMENT PANEL WIRE ASSEMBLY (a) Using a screwdriver with its tip wrapped in protective tape, release the 3 airbag connector locks. Text in Illustr ...

© 2011-2020 Copyright www.ttguide.net