DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - BODY GROUND)
CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - ECM)
AUTOMATIC TRANSMISSION SYSTEM (for 3UR-FE) - L4 Position Switch Circuit
DESCRIPTION
The four wheel drive control ECU judges whether the transfer is in L4 based on the information from the limit switch inside the transfer shift actuator assembly which is detected by the ECM. The four wheel drive control ECU inputs a signal to the combination meter assembly via CAN communication and turns on the 4LO indicator when the transfer is in L4.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - BODY GROUND) |
Disconnect the four wheel drive control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| A27-21 (L4) - Body ground | Always | 10 kΩ or higher |
Text in Illustration| *a | Front view of wire harness connector
(to Four Wheel Drive control ECU) |
| OK | |
| |
| GO TO TRANSFER SYSTEM (INSPECTION) ()
|
|
| 2.CHECK HARNESS AND CONNECTOR (FOUR WHEEL DRIVE CONTROL ECU - ECM) |
Disconnect the A38 ECM connector.
Disconnect the four wheel drive control ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| A38-21 (L4) - Body ground | Always | 10 kΩ or higher |
Text in Illustration| *a | Front view of wire harness connector
(to ECM) |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
