Toyota Camry (XV70): Vehicle Speed Sensor "A" No Signal (P050031)
DESCRIPTION
The speed sensor detects the wheel speed and sends the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a pulse signal and outputs it to the ECM via the combination meter. The ECM determines the vehicle speed based on the frequency of this pulse signal.
|
DTC No. | Detection Item |
DTC Detection Condition | Trouble Area |
MIL | Memory |
Note |
|---|---|---|---|---|---|---|
| P050031 |
Vehicle Speed Sensor "A" No Signal |
All of the following conditions are met (1-trip detection logic):
|
| Comes on |
DTC stored | SAE Code: P0500 |
|
Vehicle Condition | |||||
|---|---|---|---|---|---|
|
Pattern 1 | Pattern 2 |
Pattern 3 | Pattern 4 | ||
|
Diagnostic Condition | Park/neutral position switch D input signal is ON. |
○ | ○ |
○ | ○ |
|
The counter gear speed is 300 rpm or more. |
○ | ○ |
○ | ○ | |
|
When the vehicle is being driven in 1st gear, the transmission revolution sensor (NT) value is 1450 rpm or more. |
○ | - |
- | - | |
|
When the vehicle is being driven in 2nd gear, the transmission revolution sensor (NT) value is 840 rpm or more. |
- | ○ |
- | - | |
|
When the vehicle is being driven in 3rd gear, the transmission revolution sensor (NT) value is 540 rpm or more. |
- | - |
○ | - | |
|
When the vehicle is being driven in 4th gear, the transmission revolution sensor (NT) value is 400 rpm or more. |
- | - |
- | ○ | |
|
Malfunction Condition | No vehicle speed signal is transmitted to the ECM. |
○ | ○ |
○ | ○ |
|
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 | |
|
Vehicle Condition | |||||
|---|---|---|---|---|---|
|
Pattern 5 | Pattern 6 |
Pattern 7 | Pattern 8 | ||
|
Diagnostic Condition | Park/neutral position switch D input signal is ON. |
○ | ○ |
○ | ○ |
|
The counter gear speed is 300 rpm or more. |
○ | ○ |
○ | ○ | |
|
When the vehicle is being driven in 5th gear, the transmission revolution sensor (NT) value is 330 rpm or more. |
○ | - |
- | - | |
|
When the vehicle is being driven in 6th gear, the transmission revolution sensor (NT) value is 300 rpm or more. |
- | ○ |
- | - | |
|
When the vehicle is being driven in 7th gear, the transmission revolution sensor (NT) value is 300 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 | No vehicle speed signal is transmitted to the ECM. |
○ | ○ |
○ | ○ |
|
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:
This DTC is stored when any of the above detection patterns is met.
MONITOR DESCRIPTION
The ECM assumes that the vehicle is being driven when the transmission counter gear speed is 300 rpm or more. If there is no speed signal from the combination meter despite this condition being met, the ECM interprets this as a malfunction in the speed signal circuit, then illuminates the MIL and stores a DTC.
MONITOR STRATEGY
|
Related DTCs | P0500: Vehicle speed sensor/Verify pulse input |
|
Required sensors/components (Main) |
Vehicle speed sensor, Combination meter, Skid control ECU |
|
Required sensors/components (Sub) |
Transmission revolution sensor (NT), ECT sensor |
|
Frequency of operation |
Continuous |
| Duration |
2 sec. |
| MIL operation |
Immediately |
|
Sequence operation | None |
TYPICAL ENABLING CONDITIONS
|
The monitor will run whenever the following DTCs are not stored |
None |
| Battery voltage |
8 V or more |
|
Engine switch | On (IG) |
|
Starter | OFF |
|
Intermediate shaft speed sensor revolution |
300 rpm or more |
|
Engine | Running |
|
Shift change is completed before starting next shift change operation |
- |
| R position switch |
OFF |
| D position switch |
ON |
| Park/neutral position switch (NSW) |
OFF |
| 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 |
- Condition (A)
Condition (B)ECM selected gear
1st
Turbine speed sensor revolution
1450 rpm or more
Condition (C)ECM selected gear
2nd
Turbine speed sensor revolution
840 rpm or more
Condition (D)ECM selected gear
3rd
Turbine speed sensor revolution
540 rpm or more
Condition (E)ECM selected gear
4th
Turbine speed sensor revolution
400 rpm or more
Condition (F)ECM selected gear
5th
Turbine speed sensor revolution
330 rpm or more
Condition (G)ECM selected gear
6th
Turbine speed sensor revolution
300 rpm or more
Condition (H)ECM selected gear
7th
Turbine speed sensor revolution
300 rpm or more
ECM selected gear
8th
Turbine speed sensor revolution
300 rpm or more
- Condition (I)
ECT
20
READ NEXT:
Starter Relay Circuit Short to Battery (P061512)
DESCRIPTION While the engine is being cranked, battery voltage is applied to terminal STA of the ECM.
If the ECM detects the starter control (STA) signal while the vehicle is being driven, it determ
Internal Control Module EEPROM Data Memory Failure (P062F44)
DESCRIPTION The ECM monitors its internal operation and will store this DTC when it detects an internal malfunction.
DTC No. Detection Item
DTC Detection Condition Trouble Area
MIL
Brake Switch "B" Circuit Short to Battery (P070312)
DESCRIPTION The purpose of the stop light switch signal circuit is to prevent the engine from stalling when the brakes are suddenly applied while driving in the lock-up condition.
When the brake ped
SEE MORE:
Left Rear Wheel Speed Sensor Internal Electronic Failure (C050C49)
DESCRIPTION When the system is starting up and the skid control ECU (brake actuator assembly) detects a speed sensor circuit malfunction via the speed sensor circuit self-diagnosis function, this DTC is stored.
DTC No. Detection Item
DTC Detection Condition Trouble Area
C050C4
Freeze Frame Data
FREEZE FRAME DATA FREEZE FRAME DATA/INFORMATION
(a) Using the Techstream, check the vehicle condition (ECU, sensor) when the brake system operates or a DTC is output.
CHECK FREEZE FRAME DATA AND INFORMATION WHEN DTC WAS STORED (a) Freeze Frame Data is stored when a DTC is output.
(b) Once Free
