Code No.P1773 (P0753) Low-reverse solenoid valve system
OPERATION
Solenoid valve closes or opens according to the signals from the ECU.
The ECU energises or deenergises solenoid valve, based on input signals such as accelerator pedal position sensor opening angle, inhibitor switch, etc.
DIAGNOSIS CODE SET CONDITIONS
If the drive terminal voltage of the low-reverse solenoid valve is 3.0 V or less, it is judged that there is a short circuit or open circuit in the low-reverse solenoid valve, and diagnosis code No.P1773 (P0753) is set. If diagnosis code No.P1773 (P0753) is set, the transmission is fixed in 3rd as a fail-safe measure.
PROBABLE CAUSES
Malfunction of low-reverse solenoid valve
Damaged harness wires and connectors
Malfunction of the engine-A/T-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III diagnosis code
Q.
Are diagnosis codes P1777 (P0773) and P1778 (P0743) set?
Go to Step 9.
Go to Step 2.
STEP 2. M.U.T.-III actuator test
Item 1: Low-reverse solenoid valve
OK: Operating sound can be heard.
Q.
Is the check result normal?
Intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
STEP 12. Check the harness between A/T control solenoid valve assembly connector C-06 terminal No.10 and A/T control relay connector D-110 terminal No.3.
Check the power supply line for short and open circuit.
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Go to Step 9.
Go to Step 2.
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