P0722

L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P0722-854: Output Speed Sensor Circuit No Signal

DTC P0722-854 - Output Speed Sensor Circuit No Signal

DESCRIPTION

The transmission revolution sensor (SP2) sends the output shaft rotation speed as a signal to the hybrid vehicle control ECU.






MONITOR DESCRIPTION

The transmission revolution sensor (SP2) monitors the transmission output shaft speed. If the hybrid vehicle control ECU detects no signal from the transmission revolution sensor (SP2) even while the vehicle is moving, the hybrid vehicle control ECU will conclude that the transmission revolution sensor (SP2) is malfunctioning. The hybrid vehicle control ECU will illuminate the MIL and set a DTC.

MONITOR STRATEGY





TYPICAL ENABLING CONDITIONS





TYPICAL MALFUNCTION THRESHOLDS





COMPONENT OPERATING RANGE





WIRING DIAGRAM





INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.

PROCEDURE

1. CHECK DTC OUTPUT (HYBRID CONTROL SYSTEM)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Select the following menu items: Powertrain / Engine and ECT / Trouble Codes.
(d) Check if DTCs are output.
Result:
Hybrid control system DTCs are output.
YES -- GO TO DTC CHART
NO -- Continue to next step.
2. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR)




(a) Check the connections of the hybrid vehicle control ECU connectors.
Result:
The connectors are connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK TRANSMISSION REVOLUTION SENSOR (SP2)




(a) Disconnect connector E84 from the hybrid vehicle control ECU.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:






OK -- CHECK FOR INTERMITTENT PROBLEMS
NG -- Continue to next step.
4. CHECK CONNECTOR CONNECTION CONDITION (TRANSMISSION REVOLUTION SENSOR (SP2) CONNECTOR)




(a) Check the connection of the transmission revolution sensor (SP2) connector.
Result:
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 REVOLUTION SENSOR (SP2) - HV CONTROL ECU)




(a) Disconnect connector E27 from the transmission revolution sensor (SP2).
(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 connectors 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 transmission revolution sensor 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
6. CHECK FOR INTERMITTENT PROBLEMS
(a) Check for intermittent problems L110 Hybrid Vehicle Control System.
NG -- REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA
OK -- REPLACE HYBRID VEHICLE CONTROL ECU