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:

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.

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)

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

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.

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)

REPLACE COMBINATION METER ASSEMBLY

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:

Maintenance data (fuel, oil level, etc.)
Dimensions 2WD models except PreRunner *: Unladen vehicle 4WD models and PreRunner (except Regular Cab models) *: Unladen vehicle *: Unladen vehicle Vehicle capacity weight 2WD models except PreRunner *: Installing accessories in addition to those installed at the factory increase ...

Fuel Tank Cap
Inspection INSPECTION PROCEDURE 1. INSPECT FUEL TANK CAP ASSEMBLY (a) Check the appearance of the fuel tank cap assembly. (1) Check that there is no deformation or damage to the fuel tank cap assembly or fuel tank cap gasket. *1 Fuel Tank Cap Gasket If the ...

Removal
REMOVAL CAUTION / NOTICE / HINT Text in Illustration *a Object Exceeding Weight Limit of Transmission Jack Be sure to perform this procedure with several people as the rear differential carrier assembly is very heavy. Be sure to follow the procedure ...