DTC P0731-873: Gear 1 Incorrect Ratio: Procedure
- CHECK DTC OUTPUT (HV)
- Connect the Techstream to the DLC3.
- Turn the power switch on (IG).
- Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.
- Check if DTCs are output.
Result
Result Proceed to P0731-873 only is output. A Any of the following DTCs are also output. B DTC No. Relevant Diagnosis P0748-850 Pressure Control Solenoid "A" Electrical (Shift Solenoid Valve SL1) P0778-851 Pressure Control Solenoid "B" Electrical (Shift Solenoid Valve SL2)
B → See step 12
A: Go to next step
- CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) See step 2
NG → CONNECT SECURELY
OK: Go to next step
- CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR) See step 3
NG → CONNECT SECURELY
OK: Go to next step
- CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (SL1 SOLENOID VALVE, SL2 SOLENOID VALVE AND PRESSURE SWITCH 2) See step 4
NG → See step 9
OK: Go to next step
- CLEAR DTC See step 6
NEXT: Go to next step
- SIMULATION TEST See step 7
NG → See step 11
OK: Go to next step
- CHECK FOR INTERMITTENT PROBLEMS See step 8
NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
OK: Go to next step
- CHECK FLUID LEAKS See step 9
NG → See step 13
OK → See step 10
- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE) See step 15
NG → REPAIR OR REPLACE HARNESS OR CONNECTOR
OK → See step 11
- REPLACE HYBRID VEHICLE CONTROL ECU. Refer to COMPONENTS
- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY. Refer to COMPONENTS
- GO TO DTC CHART. Refer to DIAGNOSTIC TROUBLE CODE CHART
- REPAIR OR REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY. Refer to COMPONENTS