Expand AllThe S4 solenoid controls the pressure switching valve by signals from the transmission control computer ASSY, and it switches the output pressure from control valve No. 1 and control valve No. 2 to the line pressure. This line pressure operates clutch and brake. In case of a wire break or short-circuit in the S4 solenoid system, the transmission control computer ASSY puts out a diagnostic code.
| DTC No. |
|
Inspection part |
| P0985/65 |
|
|
| P0986/65 |
|
|
Detail
- Disconnect connector A of the transmission wire.
- Check the resistance between the terminals.
Standard:
Terminal No. (terminal symbol) Resistance value [Ω] A4 (S4) ↔ Body earth 40-46 (20°C, 68°F)
To step 3
Proceed to [2]INSPECT WIRE HARNESS AND CONNECTOR (TRANSMISSION WIRE - TRANSMISSION CONTROL COMPUTER ASSY)
- Connect connector A of the transmission wire and disconnect connector A of the transmission control computer ASSY.
- Check the resistance between the terminals. (Refer to page for the terminal layout.)
Standard:
Terminal No. (terminal symbol) Resistance value [Ω] A4 (SL3-) ↔ B8 (GND1) 40-46 (20°C, 68°F)
Repair or replace wire harness and connector.
Inspect and replace the transmission control computer ASSY.
- Disconnect the connector of the transmission solenoid ASSY (S4)
- Check the resistance between solenoid terminal and body earth.
Standard:
40-46Ω (20°C, 68°F)
Replace the automatic transmission ASSY.
Repair or replace the transmission wire.
- Confirm the DTC P0986/65 is inactive
- Start the engine and let it idling condition.
- Verify the DTC P0986/65 is inactive.
- DTC Clear
- Clear the DTC with Hino DX
- Confirm the same DTC is not reoccurred
- P0986/65 is reoccurF Return to first process
- Other DTC appearF Refer to concerned Trouble shooting
Complete
