P2721

L110F HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2720-852, P2721-853: Pressure Control Solenoid Circuit Low Voltage
P2721-853 - Pressure Control Solenoid Circuit High Voltage

DESCRIPTION

For a description of the hybrid vehicle transmission assembly, P0731-871.





MONITOR DESCRIPTION

When an open or short in the SP solenoid valve circuit is detected, the hybrid vehicle control ECU interprets this as a fault. The hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





CONFIRMATION DRIVING PATTERN





1. Connect the Techstream to the DLC3.

2. Turn the power switch on (IG) and turn the Techstream on.

3. Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).

4. Turn the power switch off.

5. Turn the power switch on (READY), and then after 1 minute or more, turn the power switch off. [A]

6. Repeat [A] 3 times. [B]

7. Turn the power switch on (IG) and turn the Techstream on.

8. Enter the following menus: Powertrain / Hybrid Control / Trouble Codes. [C]

9. Check that the permanent DTCs are cleared.

10. If the permanent DTCs are not cleared, perform the universal trip, and then check for permanent DTCs again.

HINT
- If a permanent DTC is output, the system is malfunctioning.
- If no permanent DTC is output, the system is normal.

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)

(a) Check the connections of the hybrid vehicle control ECU connectors.

OK:

The connectors are connected securely and there are no contact problems.

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

2. CHECK HYBRID VEHICLE TRANSMISSION ASSEMBLY (SP SOLENOID)

(a) Turn the power switch off.





(b) Disconnect connector E55 from the hybrid vehicle control ECU.

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

NOTICE:
Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

(d) Measure the voltage according to the value(s) in the table below.

Standard voltage:





(e) Turn the power switch off.

(f) Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open):





Standard resistance (Check for short):





NG -- CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR)
OK -- Continue to next step.

3. CHECK FOR INTERMITTENT PROBLEMS

(a) Check for intermittent problems Check for Intermittent Problems.

NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA

OK -- REPLACE HYBRID VEHICLE CONTROL ECU Service and Repair

4. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION WIRE CONNECTOR)

(a) Check the connection of the transmission wire connector.

OK:

The connector is connected securely and there are no contact problems.

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

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

(a) Disconnect the transmission wire connector.





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

(c) Measure the voltage according to the value(s) in the table below.

Standard voltage:





NOTICE:
Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.

(d) Turn the power switch off.

(e) Measure the resistance according to the value(s) in the table below.

Standard resistance (Check for open):





Standard resistance (Check for short):





HINT
The SP solenoid valve is not available separately. If it requires replacement, replace the hybrid vehicle transmission assembly.

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR

OK -- REPLACE HYBRID VEHICLE TRANSMISSION ASSEMBLY Components