- DTC judgment completed
- System normal
| Last Modified: 08-21-2023 | 6.11:8.1.0 | Doc ID: RM100000001ARNG |
| Model Year Start: 2019 | Model: Avalon | Prod Date Range: [04/2018 - ] |
| Title: UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: P079112,P079114,P079131; Intermediate Shaft Speed Sensor "A" Circuit Short to Battery; 2019 - 2022 MY Avalon [04/2018 - ] | ||
|
DTC |
P079112 |
Intermediate Shaft Speed Sensor "A" Circuit Short to Battery |
|
DTC |
P079114 |
Intermediate Shaft Speed Sensor "A" Circuit Short to Ground or Open |
|
DTC |
P079131 |
Intermediate Shaft Speed Sensor "A" No Signal |
DESCRIPTION
The transmission revolution sensor (NC) detects the rotation speed of the counter gear which shows the output shaft speed of automatic transaxle assembly.
Based on the transmission revolution sensor (NC) signal and the transmission revolution sensor (NT) signal, the ECM controls engine torque and shift timing.
|
DTC No. |
Detection Item |
DTC Detection Condition |
Trouble Area |
MIL |
Memory |
Note |
|---|---|---|---|---|---|---|
|
P079112 |
Intermediate Shaft Speed Sensor "A" Circuit Short to Battery |
All of the following conditions are met (1-trip detection logic):
|
|
Comes on |
DTC stored |
SAE Code: P07C6 |
|
P079114 |
Intermediate Shaft Speed Sensor "A" Circuit Short to Ground or Open |
All of the following conditions are met (1-trip detection logic):
|
|
Comes on |
DTC stored |
SAE Code: P07C5 |
|
P079131 |
Intermediate Shaft Speed Sensor "A" No Signal |
All of the following conditions are met (1-trip detection logic):
|
|
Comes on |
DTC stored |
SAE Code: P0793 |
DTC Detection Condition Patterns (P079131):
|
Vehicle Condition |
|||||
|---|---|---|---|---|---|
|
Pattern 1 |
Pattern 2 |
Pattern 3 |
Pattern 4 |
||
|
Diagnostic Condition |
The battery voltage is 8 V or more. |
○ |
○ |
○ |
○ |
|
Park/neutral position switch D input signal is ON. |
○ |
○ |
○ |
○ |
|
|
The vehicle speed is 25 km/h (16 mph) or more. |
○ |
○ |
○ |
○ |
|
|
When the vehicle is being driven in 1st gear, the transmission revolution sensor (NT) value is 2390 rpm or more. |
○ |
- |
- |
- |
|
|
When the vehicle is being driven in 2nd gear, the transmission revolution sensor (NT) value is 1380 rpm or more. |
- |
○ |
- |
- |
|
|
When the vehicle is being driven in 3rd gear, the transmission revolution sensor (NT) value is 890 rpm or more. |
- |
- |
○ |
- |
|
|
When the vehicle is being driven in 4th gear, the transmission revolution sensor (NT) value is 620 rpm or more. |
- |
- |
- |
○ |
|
|
Malfunction Condition |
Speed indicated by transmission revolution sensor (NC) is less than 300 rpm. |
○ |
○ |
○ |
○ |
|
Duration |
2 seconds or more |
2 seconds or more |
2 seconds or more |
2 seconds or more |
|
|
Detection Logic |
1-trip detection logic |
1-trip detection logic |
1-trip detection logic |
1-trip detection logic |
|
DTC Detection Condition Patterns (P079131):
|
Vehicle Condition |
|||||
|---|---|---|---|---|---|
|
Pattern 5 |
Pattern 6 |
Pattern 7 |
Pattern 8 |
||
|
Diagnostic Condition |
The battery voltage is 8 V or more. |
○ |
○ |
○ |
○ |
|
Park/neutral position switch D input signal is ON. |
○ |
○ |
○ |
○ |
|
|
The vehicle speed is 25 km/h (16 mph) or more. |
○ |
○ |
○ |
○ |
|
|
When the vehicle is being driven in 5th gear, the transmission revolution sensor (NT) value is 540 rpm or more. |
○ |
- |
- |
- |
|
|
When the vehicle is being driven in 6th gear, the transmission revolution sensor (NT) value is 440 rpm or more. |
- |
○ |
- |
- |
|
|
When the vehicle is being driven in 7th gear, the transmission revolution sensor (NT) value is 350 rpm or more. |
- |
- |
○ |
- |
|
|
When the vehicle is being driven in 8th gear, the transmission revolution sensor (NT) value is 300 rpm or more. |
- |
- |
- |
○ |
|
|
Malfunction Condition |
Speed indicated by transmission revolution sensor (NC) is less than 300 rpm. |
○ |
○ |
○ |
○ |
|
Duration |
2 seconds or more |
2 seconds or more |
2 seconds or more |
2 seconds or more |
|
|
Detection Logic |
1-trip detection logic |
1-trip detection logic |
1-trip detection logic |
1-trip detection logic |
|
HINT:
DTC P079131 is stored when any of the above detection patterns is met.
MONITOR DESCRIPTION
The transmission revolution sensor (NC) monitors the output shaft speed.
The ECM commands gear changes and controls the lock up timing based on the signals from the transmission revolution sensor (NC) and throttle position sensor.
If the vehicle is being driven at 25 km/h (16 mph) or more and the speed sensor (NC) signal sent to the ECM is less than 300 rpm, or if the transmission revolution sensor (NC) input signal voltage is less than 0.1 V or more than 1.9 V, the ECM will illuminate the MIL and store a DTC.
MONITOR STRATEGY
|
Related DTCs |
P0793: Speed sensor (NC)/Verify pulse input P07C5: Speed sensor (NC)/Range check (Low voltage) P07C6: Speed sensor (NC)/Range check (High voltage) |
|
Required sensors/components |
Speed sensor (NT), Speed sensor (NC) |
|
Frequency of operation |
Continuous |
|
Duration |
2 sec. |
|
MIL operation |
Immediate |
|
Sequence of operation |
None |
TYPICAL ENABLING CONDITIONS
All
|
Battery voltage |
8 V or more |
|
Engine switch |
On (IG) |
|
Starter |
OFF |
P0793
|
The monitor will run whenever the following DTCs are not stored |
P07C5, P07C6 (Intermediate shaft speed sensor circuit) U0100 (CAN communication system) P2716 (Pressure control solenoid circuit) |
|
Intermediate shaft speed sensor range check fail (P07C5, P07C6) (Pending / MIL) |
Not detected |
|
Vehicle speed |
25 km/h (15.54 mph) or more |
|
Shift change is completed and before starting next shift change operation |
- |
|
Park/neutral position switch |
OFF |
|
R range position switch |
OFF |
|
D range position switch |
ON |
|
Engine |
Running |
|
Pressure control solenoid circuit fail (P08C1, P08C2, P0962, P0963, P0966, P0967, P0970, P0971, P2720, P2721, P2814, P2815, P281D, P281E) (Pending + MIL) |
Not detected |
|
Torque converter clutch pressure control solenoid circuit fail (P2763, P2764) (Pending + MIL) |
Not detected |
|
Torque converter clutch solenoid circuit fail (P2769, P2770) (Pending + MIL) |
Not detected |
-
One of the following conditions is met: Condition (A), (B), (C), (D), (E), (F), (G) or (H)
Condition (A)
ECM selected gear
1st
Turbine speed sensor revolution
2390 rpm or more
Condition (B)
ECM selected gear
2nd
Turbine speed sensor revolution
1380 rpm or more
Condition (C)
ECM selected gear
3rd
Turbine speed sensor revolution
890 rpm or more
Condition (D)
ECM selected gear
4th
Turbine speed sensor revolution
620 rpm or more
Condition (E)
ECM selected gear
5th
Turbine speed sensor revolution
540 rpm or more
Condition (F)
ECM selected gear
6th
Turbine speed sensor revolution
440 rpm or more
Condition (G)
ECM selected gear
7th
Turbine speed sensor revolution
350 rpm or more
Condition (H)
ECM selected gear
8th
Turbine speed sensor revolution
300 rpm or more
-
Either of the following conditions is met: Condition (I) or (J)
Condition (I)
ECT
20°C (68°F) or more
ECT sensor circuit fail (P0117, P0118)
(Pending + MIL)
Not detected
Time after park/neutral position switch ON to OFF
2 seconds or more
Condition (J)
Either of the following conditions is met
(a) or (b)
(a) ECT
Less than 20°C (68°F)
(b) ECT sensor circuit fail (P0117, P0118)
(Pending + MIL)
Detected
Time after park/neutral position switch ON to OFF
30 seconds or more
P07C5, P07C6
|
The monitor will run whenever the following DTCs are not stored |
P0793 (Intermediate shaft speed sensor verify pulse input) |
|
Intermediate shaft speed sensor pulse input fail (P0793) (Pending / MIL) |
Not detected |
TYPICAL MALFUNCTION THRESHOLDS
P0793
|
Intermediate shaft speed sensor revolution |
Less than 300 rpm |
P07C5
|
Intermediate shaft speed sensor voltage |
Less than 0.1 V |
P07C6
|
Intermediate shaft speed sensor voltage |
More than 1.9 V |
COMPONENT OPERATING RANGE
|
Intermediate shaft speed sensor revolution |
300 rpm or more |
|
Intermediate shaft speed sensor voltage |
0.1 V or more and 1.9 V or less |
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
![2019 - 2022 MY Avalon [04/2018 - ]; UA80E (AUTOMATIC TRANSMISSION / TRANSAXLE): AUTOMATIC TRANSAXLE SYSTEM: DTC CHECK / CLEAR](/t3Portal/stylegraphics/info.gif)
- Connect the Techstream to the DLC3.
- Turn the engine switch on (IG) and turn the Techstream on.
- Clear the DTCs (even if no DTCs are stored, perform the clear DTC procedure).
- Turn the engine switch off and wait for 2 minutes or more.
- Turn the engine switch on (IG) 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 / Transmission / Utility / All Readiness.
- Input the DTC: P079112, P079114 or P079131.
-
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 registration and/or initialization when parts related to the automatic transaxle are replaced.
Click here
DATA LIST
NOTICE:
In the table below, the values listed under "Normal Condition" are reference values. Do not depend solely on these reference values when deciding whether a part is faulty or not.
HINT:
Using the Techstream to read the Data List allows the values or states of switches, sensors, actuators and other items to be read without removing any parts. This non-intrusive inspection can be very useful because intermittent conditions or signals may be discovered before parts or wiring is disturbed. Reading the Data List information early in troubleshooting is one way to save diagnostic time.
(a) Warm up the engine.
(b) Turn the engine switch off.
(c) Connect the Techstream to the DLC3.
(d) Turn the engine switch on (IG).
(e) Turn the Techstream on.
(f) Enter the following menus: Powertrain / Transmission / Data List / NC Sensor Speed.
(g) Read the Data List according to the display on the Techstream.
Powertrain > Transmission > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
NC Sensor Speed |
Counter gear speed |
Min.: 0 rpm Max.: 12750 rpm |
- |
- |
Powertrain > Transmission > Data List
|
Tester Display |
|---|
|
NC Sensor Speed |
HINT:
- NC Sensor Speed is always 0 while driving: Open or short in the sensor or circuit.
- NC Sensor Speed is always more than 0 and less than 300 rpm while driving the vehicle at 16 km/h (10 mph) or more: Sensor malfunction, improper installation, or intermittent connection malfunction in the circuit.
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM (NC SENSOR SPEED AND NC SENSOR VOLTAGE) |
(a) Connect the Techstream to the DLC3.
(b) Turn the engine switch on (IG).
(c) Turn the Techstream on.
(d) Enter the following menus: Powertrain / Transmission / Data List / NC Sensor Speed and NC Sensor Voltage.
(e) Read the Data List according to the display on the Techstream.
Powertrain > Transmission > Data List
|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
NC Sensor Speed |
Counter gear speed |
Min.: 0 rpm Max.: 12750 rpm |
- |
- |
|
NC Sensor Voltage |
NC sensor voltage |
Min.: 0.000 V Max.: 4.999 V |
0.1 to 1.9 V: Engine idling |
- |
Powertrain > Transmission > Data List
|
Tester Display |
|---|
|
NC Sensor Speed |
|
NC Sensor Voltage |
|
Result |
Proceed to |
|---|---|
|
Data List values are normal |
A |
|
Data List values are not normal |
B |
| A |
|
|
|
2. |
INSPECT TRANSMISSION REVOLUTION SENSOR (NC) (NC TERMINAL) |
|
(a) Disconnect the C52 transmission wire connector. |
|
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C52-21 (NCO) - Body ground |
Always |
99 to 101 Ω |
(c) Turn the engine switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Switch Condition |
Specified Condition |
|---|---|---|
|
C52-22 (NCB) - Body ground |
Engine switch on (IG) |
11 to 14 V |
| NG |
|
|
|
3. |
INSPECT TRANSMISSION WIRE (TRANSMISSION REVOLUTION SENSOR (NC)) |
|
(a) Disconnect the transmission revolution sensor (NC) connector. Click here
|
|
(b) Disconnect the C52 transmission wire connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
1 (transmission revolution sensor (NC) side) - 22 (NCB) (wire harness connector side) |
Always |
Below 1 Ω |
|
2 (transmission revolution sensor (NC) side) - 21 (NCO) (wire harness connector side) |
Always |
Below 1 Ω |
|
1 (transmission revolution sensor (NC) side) or 22 (NCB) (wire harness connector side) - Body ground |
Always |
10 kΩ or higher |
|
2 (transmission revolution sensor (NC) side) or 21 (NCO) (wire harness connector side) - Body ground |
Always |
10 kΩ or higher |
| OK |
|
| NG |
|
|
4. |
CHECK HARNESS AND CONNECTOR (TRANSMISSION WIRE - ECM) |
(a) Disconnect the C52 transmission wire connector.
(b) Disconnect the C56 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
C52-22 (NCB) - C56-73 (NCB) |
Always |
Below 1 Ω |
|
C52-21 (NCO) - C56-72 (NCO) |
Always |
Below 1 Ω |
|
C52-22 (NCB) or C56-73 (NCB) - Body ground |
Always |
10 kΩ or higher |
|
C52-21 (NCO) or C56-72 (NCO) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (TRANSMISSION WIRE - ECM) |
|
|
5. |
REPLACE ECM |
(a) Replace the ECM.
Click here
| NEXT |
|
|
|