Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM100000000VIQ6 |
Model Year Start: 2016 |
Model: Sienna |
Prod Date Range: [12/2015 - 08/2016] |
Title: MF1A (TRANSFER / 4WD / AWD): ACTIVE TORQUE CONTROL 4WD SYSTEM: AWD Warning Light Remains ON; 2016 MY Sienna [12/2015 - 08/2016] |
AWD Warning Light Remains ON
|
DESCRIPTION
The 4WD ECU assembly is connected to the combination meter assembly via the CAN communication system. If any of the following conditions are detected, the multi-information display indicates a malfunction in the active torque control 4WD system.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
HINT:
Check the condition of each related circuit connector before troubleshooting (See page
).
PROCEDURE
1.
|
CHECK FOR DTC (CAN COMMUNICATION SYSTEM AND ACTIVE TORQUE CONTROL 4WD SYSTEM)
|
(a) Check if CAN communication system DTCs are output (See page
).
(b) Check if the active torque control 4WD system DTC is output (See page
).
Result
Result
|
Proceed to
|
Neither CAN communication system DTC nor active torque control 4WD system DTC is output
|
A
|
CAN communication DTC is output
|
B
|
Active torque control 4WD system DTC is output
|
C
|
HINT:
When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.
A
|
|
|
2.
|
CHECK IF 4WD CONTROL ECU CONNECTOR IS SECURELY CONNECTED
|
(a) Check if the skid control ECU connector is securely connected.
OK:
The connector is securely connected.
NG |
|
CONNECT CONNECTOR TO ECU CORRECTLY
|
OK
|
|
|
(a) Check the battery voltage.
Standard voltage:
11 to 14 V
OK
|
|
|
4.
|
CHECK HARNESS AND CONNECTOR (4WD CONTROL ECU - BATTERY)
|
(a) Disconnect the ECU connector.
|
|
(b) Turn the ignition switch to ON.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
|
Switch Condition
|
Specified Condition
|
K1-11 (IG1) - Body Ground
|
Ignition switch ON
|
11 to 14 V
|
Text in Illustration
*a
|
Rear view of wire harness connector
(to 4WD Control ECU)
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
5.
|
CHECK HARNESS AND CONNECTOR (4WD CONTROL ECU - BODY GROUND)
|
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
K1-23 (GND) - Body Ground
|
Always
|
Below 1 Ω
|
Text in Illustration
*a
|
Rear view of wire harness connector
(to 4WD Control ECU)
|
|
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
OK
|
|
|
6.
|
READ VALUE USING TECHSTREAM (4WD WARNING LIGHT)
|
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Chassis / Four Wheel Drive / Data List.
(e) According to the display on the Techstream, read the Data List.
Four Wheel Drive
Tester Display
|
Measurement Item/Range
|
Normal Condition
|
Diagnostic Note
|
4WD Warning Light
|
AWD warning (multi-information display) / ON or OFF
|
ON: Warning on
OFF: Warning off
|
Observe combination meter
|
(f) Check the Techstream display condition of the AWD warning light.
Result
Result
|
Proceed to
|
Display of the Data List remains OFF
|
A
|
Display of the Data List remains ON
|
B
|
|