- DTC judgment completed
- System normal
| Last Modified: 07-31-2024 | 6.11:8.1.0 | Doc ID: RM100000001GYSL |
| Model Year Start: 2020 | Model: Corolla Hatchback | Prod Date Range: [01/2019 - 11/2022] |
| Title: K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: P0722,P077C,P077D; Output Speed Sensor Circuit No Signal; 2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022] | ||
|
DTC |
P0722 |
Output Speed Sensor Circuit No Signal |
|
DTC |
P077C |
Output Speed Sensor Circuit Low |
|
DTC |
P077D |
Output Speed Sensor Circuit High |
DESCRIPTION
The ECM receives a signal from the transmission revolution sensor (NOUT) installed to the continuously variable transaxle assembly 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):
|
|
Comes on |
DTC stored |
|
P077C |
Output Speed Sensor Circuit Low |
There is no malfunction in the 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) |
|
Comes on |
DTC stored |
|
P077D |
Output Speed Sensor Circuit High |
There is no malfunction in the 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). |
|
Comes on |
DTC stored |
MONITOR DESCRIPTION
The ECM receives a signal from the transmission revolution sensor (NOUT) installed to the continuously variable transaxle assembly 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, 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 |
2 seconds |
|
MIL operation |
Immediately |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
All
|
Battery voltage |
8 V or more |
|
Time after battery voltage is 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:
|
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 |
|
R range position 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:
|
Secondary pulley speed (Output speed) sensor pulse input fail (P0722) (Pending / MIL) |
Not detected |
TYPICAL MALFUNCTION THRESHOLDS
P0722:
|
Secondary pulley speed (Output speed) sensor revolution |
Less than 300 rpm |
P077C:
|
Secondary pulley speed (Output speed) sensor output voltage |
Less than 0.2 V |
P077D:
|
Secondary pulley speed (Output speed) sensor output voltage |
More than 1.8 V |
COMPONENT OPERATING RANGE
P0722:
|
Secondary pulley speed (Output speed) sensor revolution |
300 rpm or more |
P077C, P077D:
|
Secondary pulley speed (Output speed) sensor output voltage |
0.2 to 1.8 V |
CONFIRMATION DRIVING PATTERN
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
HINT:
- After repairs have been completed, clear the DTCs and then check that the vehicle has returned to normal by performing the following All Readiness check procedure.
-
When clearing the permanent DTCs, refer to the Clear Permanent DTC procedure.
Click here
![2020 - 2023 MY Corolla Corolla Hatchback [01/2019 - 11/2022]; K313 (CVT): CONTINUOUSLY VARIABLE TRANSAXLE SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
- Connect the Techstream to the DLC3.
- Turn the ignition switch to ON and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the ignition switch off and wait for 2 minutes or more.
- Turn the ignition switch to ON and turn the Techstream on.
- Start the engine.
-
Perform the D Position Shift Test inspection in Road Test. [*1]
Click here
HINT:
[*1]: Normal judgment procedure.
The normal judgment procedure is used to complete DTC judgment and also used when clearing permanent DTCs.
- Stop the vehicle.
- Enter the following menus: Powertrain / Engine and ECT / Utility / All Readiness.
- Input the DTC: P0722, P077C or P077D.
-
Check the DTC judgment result.
Techstream Display
Description
NORMAL
ABNORMAL
- DTC judgment completed
- System abnormal
INCOMPLETE
- DTC judgment not completed
- Perform driving pattern after confirming DTC enabling conditions
N/A
- Unable to perform DTC judgment
- Number of DTCs which do not fulfill DTC preconditions has reached ECU memory limit
HINT:
- If the judgment result shows NORMAL, the system is normal.
- If the judgment result shows ABNORMAL, the system has a malfunction.
- If the judgment result shows INCOMPLETE or N/A, perform the normal judgment procedure again.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
-
Strictly observe posted speed, limits, traffic laws and road conditions.
- Do not drive the vehicle with the cable of the Techstream contacting the pedals, shift lever or steering wheel.
- Driving the vehicle with the cable of the Techstream contacting these areas could impede vehicle control, resulting in a serious accident.
-
Do not operate the Techstream while driving the vehicle.
- Operating the Techstream while driving the vehicle will prevent you from paying sufficient attention to vehicle surroundings, and could result in a serious accident.
NOTICE:
-
Perform the universal trip to clear permanent DTCs.
Click here
-
Perform initialization when parts related to the continuously variable transaxle system are replaced.
Click here
-
Check that no DTCs are stored after performing initialization.
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.
(e) According to 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.: 65535 rpm |
|
Data is displayed in increments of 50 rpm. |
|
NOUT Sensor Voltage |
Transmission revolution sensor (NOUT) output voltage |
Min.: 0.000 V Max.: 4.999 V |
0.1 to 1.9 V: Engine idling (Vehicle stopped with shift lever in P or N) |
- |
Powertrain > Engine and ECT > Data List
|
Tester Display |
|---|
|
SPD (NOUT) |
|
NOUT Sensor Voltage |
|
Result |
Proceed to |
|---|---|
|
Data List value is not normal |
A |
|
Data List value is normal |
B |
| B |
|
|
|
2. |
INSPECT TRANSMISSION REVOLUTION SENSOR (NOUT) |
(a) Remove the transmission revolution sensor (NOUT).
Click here
(b) Connect the battery to the transmission revolution sensor (NOUT) as shown in the illustration.
|
*1 |
Battery |
*2 |
Ammeter |
|
*a |
Component without harness connected (Transmission Revolution Sensor (NOUT)) |
*b |
Magnet |
|
*c |
5 mm or less |
- |
- |
(c) Wave a magnet left and right 5 mm (0.197 in.) or less from the tip of the transmission revolution sensor (NOUT) to output a high/low signal while measuring the current.
NOTICE:
Make sure to wave the magnet during the inspection. The current will not change unless the magnet is moved as shown 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 |
(e) Install the transmission revolution sensor (NOUT).
Click here
| NG |
|
REPLACE TRANSMISSION REVOLUTION SENSOR (NOUT)
|
|
|
3. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NOUT) - ECM) |
(a) Disconnect the C68 transmission revolution sensor (NOUT) connector.
(b) Disconnect the C77 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C68-1 (NOTO) - C77-127 (NOTO) |
Always |
Below 1 Ω |
|
C68-2 (NOTB) - C77-128 (NOTB) |
Always |
Below 1 Ω |
|
C68-1 (NOTO) or C77-127 (NOTO) - Body ground and other terminals |
Always |
10 kΩ or higher |
|
C68-2 (NOTB) or C77-128 (NOTB) - Body ground and other terminals |
Always |
10 kΩ or higher |
(d) Connect the C77 ECM connector.
(e) Connect the C68 transmission revolution sensor (NOUT) connector.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION REVOLUTION SENSOR (NOUT) - ECM) |
|
|
4. |
REPLACE ECM |
(a) Replace the ECM.
Click here
| NEXT |
|
|
5. |
REPLACE ECM |
(a) Replace the ECM.
Click here
| NEXT |
|
|
|