P0732-869

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0732-869: Gear 2 Incorrect Ratio

DTC P0732-869 - Gear 2 Incorrect Ratio

DESCRIPTION

The hybrid vehicle control ECU uses the B1 and B2 brakes in the hybrid vehicle transmission assembly to switch between low and high gear.
Shifting control is performed using the line pressure circuit, B1 circuit, and B2 circuit. The hybrid vehicle control ECU detects abnormal line pressure by monitoring the operation of the fluid pressure switch in each circuit.
HINT: Although the DTC title indicates an incorrect gear ratio, DTC P0731-871 relates to a malfunction of the B2 hydraulic circuit.





HINT:
- The preceding timing chart is for the first "Control the Shift Position" active test. The chart will differ for the second or later "Control the Shift Position" active test.
- If "Hi" is selected in the first "Control the Shift Position" active test, it may take more time to shift to "Hi".

HINT: Although the DTC title indicates an incorrect gear ratio, this DTC relates to a malfunction of the B1 hydraulic circuit.







WIRING DIAGRAM






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
A -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0732
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR) P0732
NG -- CONNECT SECURELY
OK -- Continue to next step.
4. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (SL1 SOLENOID VALVE, SL2 SOLENOID VALVE)




(a) Disconnect connector E55 from the hybrid vehicle control ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - TRANSMISSION WIRE)
OK -- Continue to next step.
5. CLEAR DTC P0732
NEXT -- Continue to next step.
6. SIMULATION TEST P0732
NG -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY
OK -- Continue to next step.
7. CHECK FOR INTERMITTENT PROBLEMS P0732
NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
OK -- Continue to next step.
8. CHECK FLUID LEAKS P0732
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) P0732
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY