Last Modified: 04-05-2023 6.11:8.1.0 Doc ID: RM100000000ZRJ0
Model Year Start: 2017 Model: Sienna Prod Date Range: [08/2016 -           ]
Title: CRUISE CONTROL: CRUISE CONTROL SYSTEM: TC and CG Terminal Circuit; 2017 - 2020 MY Sienna [08/2016 -        ]

TC and CG Terminal Circuit

DESCRIPTION

Connecting terminals TC and CG of the DLC3 causes the system to enter self-diagnostic mode. If a malfunction is present, the MIL will blink.

HINT:

When a particular warning light remains blinking, a ground short in the wiring of terminal TC of the DLC3 or an internal ground short in the relevant ECU is suspected.

WIRING DIAGRAM

PROCEDURE

1.

CHECK HARNESS AND CONNECTOR (TERMINAL TC of DLC3 - ECM)

(a) Disconnect the A69 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

A69-33 (TC) - D16-13 (TC)

Always

Below 1 Ω

(c) Reconnect the ECM connector.

Result

Result

Proceed to

NG

A

OK

B
A

REPAIR OR REPLACE HARNESS OR CONNECTOR
B

2.

CHECK HARNESS AND CONNECTOR (TERMINAL 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

D16-4 (CG) - Body ground

Always

Below 1 Ω

Text in Illustration

*a

DLC3
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR
OK

3.

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

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

D16-13 (TC) - Body ground

Always

10 kΩ or higher

Text in Illustration

*a

DLC3
OK

PROCEED TO NEXT SUSPECTED AREA SHOWN IN PROBLEM SYMPTOMS TABLE

(See page 2017 MY Sienna [08/2016 - 11/2017]; CRUISE CONTROL: CRUISE CONTROL SYSTEM: PROBLEM SYMPTOMS TABLE 2018 - 2020 MY Sienna [11/2017 -        ]; CRUISE CONTROL: CRUISE CONTROL SYSTEM: PROBLEM SYMPTOMS TABLE )
NG

REPAIR OR REPLACE HARNESS OR CONNECTOR OR EACH ECU