Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000ZY3F |
Model Year Start: 2017 |
Model: Sienna |
Prod Date Range: [08/2016 -
] |
Title: MF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE CONTROL 4WD 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 4WD control ECU to display 2-digit DTCs by flashing the AWD warning light.
HINT:
When each warning light remains blinking, a short to ground in the wiring of terminal TC of the DLC3 or an internal short to ground in each ECU is suspected.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
HINT:
Check the condition of each related circuit connector before troubleshooting (See page
).
PROCEDURE
1.
|
CHECK FOR DTC (CAN COMMUNICATION SYSTEM)
|
(a) Check if the CAN communication DTC is output (See page
).
Result
Result
|
Proceed to
|
DTC is not output
|
A
|
DTC is output
|
B
|
B |
|
REPAIR CAN COMMUNICATION SYSTEM
(See page
)
|
A
|
|
|
2.
|
CHECK HARNESS AND CONNECTOR (TC OF DLC3 - TC OF ECM AND BODY GROUND)
|
(a) Turn the ignition switch off.
(b) Disconnect the A69 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
D16-13 (TC) - A69-33 (TC)
|
Always
|
Below 1 Ω
|
D16-13 (TC) - Body Ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
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:
Tester Connection
|
Condition
|
Specified Condition
|
D16-4 (CG) - Body ground
|
Always
|
Below 1 Ω
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
4.
|
CHECK HARNESS AND CONNECTOR (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
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|