Expand AllEight pressure switches are installed in the valve body. The oil passages in the valve body are switched according to the operation status of each solenoid, each shift valve, and each control valve etc., and the pressure switches are switched ON or OFF. Pressure switch 8 operates according to the status of the D range pressure. If trouble occurs in this PSW8 signal system or in the valve body system, the transmission control computer ASSY puts out a diagnostic code.
| DTC No. |
|
Inspection part |
| P0706/44 |
|
|
| DTC No. |
|
Inspection part |
| P0706/44 |
|
|
Detail
- Set the ignition switch to ON.
- Check the terminal voltage the transmission control computer ASSY. (Refer to page for the terminal layout.)
Standard:
Terminal No.
(terminal symbol)Measuring condition Voltage [V] A26 (PSW8) ↔ B8 (GND1) P range
(pressure switch 8 OFF)12-32 A26 (PSW8) ↔ B8 (GND1) D range
(Pressure switch 8 ON)0-3
Inspect and replace the transmission control computer ASSY.
Proceed to [2]INSPECT WIRE HARNESS AND CONNECTOR (TRANSMISSION CONTROL COMPUTER ASSY - TRANSMISSION WIRE)
- Disconnect connector B of the transmission wire.
- Set the ignition switch to ON.
- Check the voltage between the terminals of the connector on the wire harness side of the transmission wire and the connector on the body earth side.
Standard:
Terminal No.
(terminal symbol)Measuring condition Voltage [V] A26 (PSW8) ↔ Body earth P range
(pressure switch 8 OFF)12-32
Repair or replace wire harness and connector.
Proceed to [3]INSPECT TRANSMISSION WIRE BY ITSELF
- Disconnect the transmission wire.
- Check for continuity between the terminals.
Standard:
Terminal No.
(terminal symbol)Conductivity B6 (PSW8) ↔ PSW8 Yes
Repair or replace the transmission wire.
Replace the automatic transmission ASSY.
- Confirm the DTC P0706/44 is inactive
- Start the engine and let it idling condition.
- Verify the DTC P0706/44 is inactive.
- DTC Clear
- Clear the DTC with Hino DX
- Confirm the same DTC is not reoccurred
- P0706/44 is reoccurF Return to first process
- Other DTC appearF Refer to concerned Trouble shooting
Complete
