Toyota Tacoma (2015-2018) Service Manual: Entire Combination Meter does not Operate
DESCRIPTION
This circuit is the power source circuit for the meter. This circuit provides two types of power sources, one is a constant power source mainly used as a backup power source, and the other is an IG power source mainly used for signal transmission. The constant power source is mainly used as a backup power source for the meter CPU, however, it is also used for CAN communication. If a voltage of 12 V is not applied to terminal IG+ when turning the ignition switch ON, the indicators will not operate.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (COMBINATION METER ASSEMBLY - BATTERY AND BODY GROUND) |
|
(a) Disconnect the combination meter assembly connector. |
|
(b) 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 |
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C9-18 (ES) - Body ground |
Always |
Below 1 Ω |
|
*a |
Front view of wire harness connector (to Combination Meter Assembly) |
| OK | .gif) |
REPLACE COMBINATION METER ASSEMBLY |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Lost Communication with ECM / PCM "A" (U0100,U0129,U0142,U0151,U0163,U023A,U1104)
DESCRIPTION
The combination meter communicates with the ECM, skid control ECU, power steering
ECU, main body ECU (multiplex network body ECU), airbag sensor assembly, navigation
receiver assembly ...
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 appropriat ...
Other materials:
Inspection
INSPECTION
PROCEDURE
1. REMOVE SPIRAL CABLE SUB-ASSEMBLY WITH SENSOR
(a) If there are any defects as mentioned below, replace the spiral cable sub-assembly
with a new one:
Scratches, cracks, dents or chips on the connector or the spiral cable sub-assembly.
(b) Inspect the spiral ca ...
Data List / Active Test
DATA LIST / ACTIVE TEST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference
values. Do not depend solely on these reference values when deciding whether a part
is faulty or not.
HINT:
Using the Techstream to read the Data List allows the values or s ...
Installation
INSTALLATION
PROCEDURE
1. INSTALL FRONT DISC
(a) Align the matchmarks of the front disc and the front axle hub and
install the front disc.
Text in Illustration
*a
Matchmark
HINT:
When replacing the disc with a new one, se ...
