Toyota CH-R Service Manual: Output Speed Sensor Circuit No Signal (P0722,P077C,P077D)

Toyota CH-R Service Manual / K114 Cvt / Continuously Variable Transaxle System / Output Speed Sensor Circuit No Signal (P0722,P077C,P077D)

DESCRIPTION

The ECM receives a signal from the transmission revolution sensor (NOUT) installed in the continuously variable transaxle and determines the output shaft (secondary pulley) speed in order to control the gear ratio.

The transmission revolution sensor (NOUT) detects the continuously variable transaxle output shaft (secondary pulley) speed and sends a signal to the ECM.

DTC No.

Detection Item

DTC Detection Condition

Trouble Area

MIL

Memory

P0722

Output Speed Sensor Circuit No Signal

All of the following conditions are met (1 trip detection logic):

  • Vehicle is driven with the shift lever in D
  • Output shaft speed is 300 rpm or more
  • No malfunctions are found in the park/neutral position switch
  • Output shaft speed indicated by the transmission revolution sensor (NOUT) is less than 300 rpm for 2 seconds
  • Wire harness or connector
  • Transmission revolution sensor (NOUT)
  • ECM

Comes on

DTC stored

P077C

Output Speed Sensor Circuit Low

There is no malfunction in transmission revolution sensor (NOUT) signals, and the transmission revolution sensor (NOUT) output voltage is less than 0.2 V for 2 seconds (1 trip detection logic)

  • Wire harness or connector
  • Transmission revolution sensor (NOUT)
  • ECM

Comes on

DTC stored

P077D

Output Speed Sensor Circuit High

There is no malfunction in transmission revolution sensor (NOUT) signals, and the transmission revolution sensor (NOUT) output voltage is higher than 1.8 V for 2 seconds (1 trip detection logic).

  • Wire harness or connector
  • Transmission revolution sensor (NOUT)
  • ECM

Comes on

DTC stored

MONITOR DESCRIPTION

The ECM receives a signal from the transmission revolution sensor (NOUT) installed in the continuously variable transaxle and determines the output shaft (secondary pulley) speed in order to control the gear ratio.

If the ECM detects no signal from the transmission revolution sensor (NOUT) even while the vehicle is moving, it will determine that the transmission revolution sensor (NOUT) is malfunctioning. The ECM will illuminate the MIL and store a DTC.

MONITOR STRATEGY

Related DTCs

P0722: Output speed sensor (NOUT) / Verify pulse input

P077C: Output speed sensor (NOUT) / Range check (Low voltage)

P077D: Output speed sensor (NOUT) / Range check (High voltage)

Required sensors/Components

Transmission revolution sensor (NOUT)

Frequency of operation

Continuous

Duration Conditions

2 seconds

MIL operation

Immediately

Sequence of operation

None

TYPICAL ENABLING CONDITIONS

All

Battery voltage

8 V or more

Time after Battery voltage 8 V or more

0.5 seconds or more

Write Inhibit

permit

Time after Write status forbiddance to permit

0.5 seconds or more

Ignition switch

ON

Time after Ignition switch OFF to ON

0.5 seconds or more

Starter

OFF

Time after Starter ON to OFF

0.5 seconds or more

P0722:

All of the following conditions are met:

-

Output shaft revolution

300 rpm or more

Output Speed Sensor Range check fail (P077C, P077D) (Pending / MIL)

Not detected

Turbine Speed Sensor revolution

1050 rpm or more

Transmission "R" range switch

OFF

Transmission Range Switch circuit fail (P0705) (Pending + MIL)

Not detected

Engine

Running

Park Neutral Position switch

OFF

One of the following conditions is met:

-

Command to Shift Solenoid

OFF

Command to Torque Converter Clutch Solenoid

ON

Shift Solenoid circuit fail (P099B, P099C) (Pending + MIL)

Not detected

Torque Converter Clutch Solenoid circuit fail (P2769, P2770) (Pending + MIL)

Not detected

Pressure Control Solenoid circuit fail (P2822, P282B) (Pending + MIL)

Not detected

P077C, P077D:

Output Speed Sensor pulse input fail (P0722) (Pending + MIL)

Not detected

TYPICAL MALFUNCTION THRESHOLDS

P0722:

Output Speed Sensor revolution

Less than 300 rpm

P077C:

Output Speed Sensor voltage

Less than 0.2 V

P077D:

Output Speed Sensor voltage

Higher than 1.8 V

COMPONENT OPERATING RANGE

P0722:

Output Speed Sensor revolution

300 rpm or more

P077C, P077D:

Output Speed Sensor voltage

0.2 to 1.8 V

WIRING DIAGRAM

CAUTION / NOTICE / HINT

NOTICE:

  • Perform initialization when parts related to the continuously variable transaxle are replaced.

    Click here

  • Check that no DTCs are stored after performing initialization.

    Click here

  • Perform the universal trip to clear permanent DTCs.

    Click here

HINT:

After performing repair, clear the DTCs and perform the following procedure to check that DTCs are not output.

  1. Drive the vehicle for 2 seconds or more at 6 km/h (4 mph) or more with the shift lever in D.
  2. Check for DTCs again.

    Click here

PROCEDURE

1.

READ VALUE USING TECHSTREAM (SPD (NOUT) AND NOUT SENSOR VOLTAGE)

(a) Connect the Techstream to the DLC3.

(b) Turn the ignition switch to ON.

(c) Turn the Techstream on.

(d) Enter the following menus: Powertrain / Engine and ECT / Data List.

Powertrain > Engine and ECT > Data List

Tester Display

SPD (NOUT)

NOUT Sensor Voltage

(e) In accordance with the display on the Techstream, read the Data List.

Powertrain > Engine and ECT > Data List

Tester Display

Measurement Item

Range

Normal Condition

Diagnostic Note

SPD (NOUT)

Secondary pulley speed (NOUT)

Min.: 0 rpm

Max.: 12750 rpm

  • 0 rpm: Vehicle stopped
  • Approximately 2500 rpm*1 or 2800 rpm*2: Vehicle cruising at approximately 60 km/h (37 mph)

Data is displayed in increments of 50 rpm.

NOUT Sensor Voltage

Secondary pulley speed (NOUT) sensor output voltage

Min.: 0.000 V

Max.: 4.999 V

0.2 to 1.8 V: Engine idling (Vehicle stopped with shift lever in P or N)

-

  • *1: w/ Canister Pump Module
  • *2: w/o Canister Pump Module

Result

Proceed to

Data display is not within Normal Condition range

A

Data display is within Normal Condition range

B

B

GO TO STEP 5

A

2.

INSPECT TRANSMISSION REVOLUTION SENSOR (NOUT)

(a) Remove the transmission revolution sensor (NOUT).

Click here

(b) Connect the battery to the sensor as shown in the illustration.

*1

Battery

-

-

*a

Component without harness connected

(Transmission Revolution Sensor (NOUT))

*b

Magnet

*c

5 mm or less

*d

Ammeter

(c) Wave a magnetic object left and right in front of the transmission revolution sensor (NOUT) tip (5 mm (0.197 in.) or less) to change the high/low signals while measuring the current.

NOTICE:

Make sure to wave the magnetic object during the inspection. The current will not change without waving the magnetic object as indicated by the arrow in the illustration.

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

Standard Current:

Tester Connection

Condition

Specified Condition

1 (NOTO) - 2 (NOTB)

Low signal

4 to 8 mA

1 (NOTO) - 2 (NOTB)

High signal

12 to 16 mA

NG

REPLACE TRANSMISSION REVOLUTION SENSOR (NOUT)

OK

3.

CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NOUT) - ECM)

(a) Disconnect the C46 transmission revolution sensor (NOUT) connector.

(b) Disconnect the C63 ECM connector.

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

Standard Resistance:

Tester Connection

Condition

Specified Condition

C46-1 (NOTO) - C63-127 (NOTO)

Always

Below 1 Ω

C46-2 (NOTB) - C63-128 (NOTB)

Always

Below 1 Ω

C46-1 (NOTO) or C63-127 (NOTO) - Body ground and other terminals

Always

10 kΩ or higher

C46-2 (NOTB) or C63-128 (NOTB) - Body ground and other terminals

Always

10 kΩ or higher

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NOUT) - ECM)

OK

4.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

PERFORM INITIALIZATION

5.

REPLACE ECM

(a) Replace the ECM.

Click here

NEXT

PERFORM INITIALIZATION

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