Toyota Tacoma (2015-2018) Service Manual: TC and CG Terminal Circuit

Toyota Tacoma (2015-2018) Service Manual / Tire And Wheel / Tire Pressure Warning System / 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 DIAGRAM

PROCEDURE

1.	CHECK CAN COMMUNICATION SYSTEM

(a) Check for DTCs (See page Result ).

Result

Result	Proceed to
DTCs are not output.	A
DTCs are output.	B

GO TO CAN COMMUNICATION SYSTEM

2.	CHECK DTC (C2179/79)

(a) Check if DTC C2179/79 is output (See page ).

Result

Result	Proceed to
DTC C2179/79 is not output.	A
DTC C2179/79 is output.	B

GO TO DTC (C2179/79)

3.	INSPECT DLC3

(a) Turn the ignition switch to ON.

Text in Illustration

*a	Front view of DLC3

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

Standard Voltage:

Tester Connection	Switch Condition	Specified Condition
D4-13 (TC) - D4-4 (CG)	Ignition switch ON	11 to 14 V

GO TO STEP 5

4.	REPLACE ECM

(a) Turn the ignition switch off.

Text in Illustration

*a	Front view of DLC3

(b) Replace the ECM.

for 2GR-FKS: (See page for 2TR-FE: (See page )

for 2TR-FE: (See page (c) Using SST, connect terminals TC and CG of the DLC3. )

SST: 09843-18040

(d) Check that the tire pressure warning light is blinking.

OK:

The tire pressure warning light is blinking.

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See page ).

END

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

5.	CHECK HARNESS AND CONNECTOR (TC of DLC3 - ECM)

(a) Disconnect the A43 ECM connector.

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

Standard Resistance:

for 2GR-FKS:

Tester Connection	Condition	Specified Condition
D4-13 (TC) - E14-20 (TC)	Always	Below 1 Ω
D4-13 (TC) or E14-20 (TC) - Body ground	Always	10 kΩ or higher

Standard Resistance:

for 2TR-FE:

Tester Connection	Condition	Specified Condition
D4-13 (TC) - E21-19 (TC)	Always	Below 1 Ω
D4-13 (TC) or E21-19 (TC) - Body ground	Always	10 kΩ or higher

REPAIR OR REPLACE HARNESS OR CONNECTOR

6.	CHECK HARNESS AND CONNECTOR (CG of DLC3 - BODY GROUND)

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
D4-4 (CG) - Body ground	Always	Below 1 Ω

Text in Illustration

*a	Front view of DLC3

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See page ).

REPAIR OR REPLACE HARNESS OR CONNECTOR

7.	REPLACE ECM

(a) Replace the ECM.

for 2GR-FKS: (See page for 2TR-FE: (See page )

for 2TR-FE: (See page Text in Illustration )

Text in Illustration

*a	Front view of DLC3

(b) Using SST, connect terminals TC and CG of the DLC3.

SST: 09843-18040

OK:

The tire pressure warning light is blinking.

HINT:

If troubleshooting has been carried out according to Problem Symptoms Table, refer back to the table and proceed to the next step before replacing the part (See page ).

END

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

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 NOTICE: When replacing the tire pressure warning EC ...

Tire Pressure Warning Light Circuit

DESCRIPTION If the tire pressure warning ECU and receiver detects any problems, the tire pressure warning light blinks for 1 minute then illuminates, and tire pressure monitoring is disabled at t ...

Other materials:

Transmission Fluid Temperature Sensor "A" Circuit Low Input (P0712,P0713)
DESCRIPTION The No. 1 ATF temperature sensor converts the fluid temperature into a resistance value for use by the ECM. The ECM applies a voltage to the temperature sensor through terminal THO1 of the ECM. The sensor resistance changes with the ATF temperature. As the temperature becomes hi ...

Transmitter ID not Received in Main Mode (C2126/26)
DESCRIPTION After all transmitter IDs are registered, DTC C2126/26 is stored in the tire pressure warning ECU and receiver and the tire pressure warning light blinks for 1 minute and then illuminates. When the tire pressure warning ECU and receiver successfully receives radio waves from all ...

Terminals Of Ecu
TERMINALS OF ECU 1. CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) (a) Disconnect the S50 sliding roof ECU (sliding roof drive gear sub-assembly) connector. (b) Measure the resistance and voltage according to the value(s) in the table below. HINT: Measure the values on the ...