DTC P0722-854: Output Speed Sensor Circuit No Signal: Procedure

1. 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: Go to next step 

1. Turn the power switch off.
2. Disconnect connector E55 from the hybrid vehicle control ECU.
   Fig 1: Identifying Connector E55 From Hybrid Vehicle Control ECU

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   E55-29 (SP2+) - E55-28 (SP2-)	Approximately -22°F (-30°C)	450 to 546 Ω (Reference)
   	Approximately 68°F (20°C)	560 to 680 Ω
   	Approximately 176°F (80°C)	692 to 840 Ω (Reference)

NG → See step   5 

OK: Go to next step 

1. Connect connector E55 to the hybrid vehicle control ECU.
2. Connect an oscilloscope to the hybrid vehicle control ECU terminals specified in the following table, and measure the waveform.
   Fig 2: Hybrid Vehicle Control ECU Waveform Graph

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   Item	Contents
   Terminal	E55-28 (SP2-) - E55-29 (SP2+)
   Equipment Setting	2 V/DIV., 2 ms./DIV.
   Condition	Driving at approximately 34 mph (55 km/h)

   HINT: 

   The higher the vehicle speed, the shorter the cycle and higher the voltage.

NG → See step   7 

OK: Go to next step 

1. Check for intermittent problems. Refer to CHECK FOR INTERMITTENT PROBLEMS .

NG → REPAIR OR REPLACE MALFUNCTIONING PARTS, COMPONENT AND AREA 

OK → See step   8 

1. Check the connection of the transmission revolution sensor (SP2) connector.

   OK

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

NG → CONNECT SECURELY 

OK: Go to next step 

1. Disconnect the transmission revolution sensor (SP2) connector.
   Fig 3: Checking Harness And Connector (Transmission Revolution Sensor -- Hybrid Vehicle Control ECU)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
2. Turn the power switch on (IG).
3. Measure the voltage according to the value(s) in the table below.

   Standard voltage

   Tester Connection	Switch Condition	Specified Condition
   E55-28 (SP2-) - Body ground	Power switch on (IG)	Below 1 V
   E55-29 (SP2+) - Body ground	Power switch on (IG)	Below 1 V

   NOTE:

   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.

4. Turn the power switch off.
5. Measure the resistance according to the value(s) in the table below.

   Standard resistance (Check for open)

   Tester Connection	Switch Condition	Specified Condition
   E55-28 (SP2-) - E63-1	Power switch off	Below 1 Ω
   E55-29 (SP2+) - E63-2	Power switch off	Below 1 Ω

   Standard resistance (Check for short)

   Tester Connection	Switch Condition	Specified Condition
   E55-28 (SP2-) or E63-1 - Body ground and other terminals	Power switch off	10 kΩ or higher
   E55-29 (SP2+) or E63-2 - Body ground and other terminals	Power switch off	10 kΩ or higher

   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 → See step   7