TC and CG Terminal Circuit [08/2013 - ]: Procedure

WARNING: This page is about a different car, the 2014 Lexus ES 300h. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CAN COMMUNICATION SYSTEM

Check if CAN communication system DTCs are output. Refer to DIAGNOSIS SYSTEM [08/2013 - ] .

Result

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

B → See step 6

A: Go to next step

CHECK HARNESS AND CONNECTOR (TC of DLC3 - POWER MANAGEMENT CONTROL ECU)

Disconnect the H1 power management control ECU connector.

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H29-13 (TC) - H1-11 (TC)	Always	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

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

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

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Standard Resistance

Tester Connection	Condition	Specified Condition
H29-4 (CG) - Body ground	Always	Below 1 Ω

TEXT IN ILLUSTRATION

*a	Front view of DLC3

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to next step

CHECK HARNESS AND CONNECTOR (TC of DLC3 - BODY GROUND)

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

Standard Resistance

Tester Connection	Condition	Specified Condition
H29-13 (TC) - Body ground	Always	10 kΩ or higher

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. Refer to PROBLEM SYMPTOMS TABLE [08/2013 - ] .

NG → REPAIR OR REPLACE WIRE HARNESS OR EACH ECU

OK → See step 5

REPLACE BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY. Refer to REMOVAL [08/2013 - ]
INSPECT CAN COMMUNICATION SYSTEM. Refer to HOW TO PROCEED WITH TROUBLESHOOTING [08/2013 - ]