Toyota Tacoma (2015-2018) Service Manual: TC and CG Terminal Circuit
DESCRIPTION
The DLC3 circuit enables reading of Diagnostic Trouble Codes (DTCs) with no Techstream by connecting terminals TC and CG of the DLC3 connector.
Stored DTCs are displayed in blinking patterns of the CRUISE MAIN indicator light located on the combination meter.
WIRING DIAGRAM
HINT:
When a particular warning light blinks continuously, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in the relevant ECU is suspected.
PROCEDURE
|
1. |
CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM) |
(a) Disconnect the E21 ECM connector.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
D4-13 (TC) - E14-20 (TC) |
Always |
Below 1 Ω |
(c) Reconnect the ECM connector.
| NG | .gif) |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
.gif)
|
2. |
CHECK HARNESS AND CONNECTOR (TC of DLC3 - BODY GROUND) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
3. |
CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| OK | |
REPLACE ECM |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
Cruise Main Indicator Light Circuit
DESCRIPTION
When the ECM detects a cruise control switch on signal from the cruise
control switch, the ECM sends the signal to the combination meter assembly
through CAN communication. ...
Other materials:
How To Proceed With Troubleshooting
CAUTION / NOTICE / HINT
HINT:
Use the following procedure to troubleshoot the audio and visual system.
*: Use the Techstream.
PROCEDURE
1.
VEHICLE BROUGHT TO WORKSHOP
NEXT
...
Downhill Assist Control Switch Malfunction (Test Mode DTC) (C1379)
DESCRIPTION
DTC C1379 is cleared when the crawl control switch sends a crawl control operation
signal or when test mode ends.
DTC Code
DTC Detection Condition
Trouble Area
C1379
Stored only during test mode.
Crawl ...
Meter Illumination does not Dim at Night
DESCRIPTION
In this circuit, the combination meter assembly auto dimmer signals from the
main body ECU using the CAN communication system (CAN V1 Bus). When the combination
meter assembly an auto dimmer signal, it dims the meter illumination (warning and
indicator lights). The main body ECU ( ...
