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

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