P0731-873

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0731-873: Gear 1 Incorrect Ratio

DTC P0731-873 - Gear 1 Incorrect Ratio

DESCRIPTION

For a description of the hybrid vehicle transmission assembly, P0731-871.
HINT: Although the DTC title indicates an incorrect gear ratio, this DTC relates to a malfunction of the B2 hydraulic circuit.





WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (HV)
(a) Connect the intelligent tester or Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items:
(1) Intelligent tester - Select: DIAGNOSIS / OBD/MOBD / HV ECU / DTC INFO / CURRENT CODES.
(2) Techstream - Select: Powertrain / Hybrid Control / Trouble Codes.
(d) Check if DTCs are output.
Result:










B -- GO TO DTC CHART
A -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0731-871

NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR) P0731-871

NG -- CONNECT SECURELY
OK -- Continue to next step.
4. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (SL1 SOLENOID VALVE, SL2 SOLENOID VALVE AND PRESSURE SWITCH 2) P0731-871

NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE)
OK -- Continue to next step.
5. CLEAR DTC P0731-871

NEXT -- Continue to next step.
6. SIMULATION TEST P0731-871

NG -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
OK -- Continue to next step.
7. CHECK FOR INTERMITTENT PROBLEMS P0731-871

NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
OK -- Continue to next step.
8. CHECK FLUID LEAKS P0731-871

NG -- REPAIR OR REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
OK -- REPLACE HYBRID VEHICLE CONTROL ECU
9. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE) P0731-871

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY