P0731-873: Gear 1 Incorrect Ratio

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

DESCRIPTION

For a description of the hybrid vehicle transmission assembly, P0731.

HINT
Although the DTC title indicates an incorrect gear ratio, this DTC relates to a malfunction of the B2 hydraulic circuit.





WIRING DIAGRAM

Refer to the wiring diagram for DTC P0731-871 P0731.

INSPECTION PROCEDURE

PROCEDURE

1. CHECK DTC OUTPUT (HV)

(a) Connect the Techstream to the DLC3.

(b) Turn the power switch on (IG).

(c) Select the following menu items: Powertrain / Hybrid Control / Trouble Codes.

(d) Check if DTCs are output.

Result:









B -- GO TO DTC CHART Hybrid Control System
A -- Continue to next step.

2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0731

NG -- CONNECT SECURELY
OK -- Continue to next step.

3. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR) P0731

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

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

5. CLEAR DTC P0731

NEXT -- Continue to next step.

6. SIMULATION TEST P0731

NG -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components
OK -- Continue to next step.

7. CHECK FOR INTERMITTENT PROBLEMS P0731

NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
OK -- Continue to next step.

8. CHECK FLUID LEAKS P0731

NG -- REPAIR OR REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components

9. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE) P0731

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components