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Home >> Lexus >> 2017 >> IS 300 F Sport >> Repair and Diagnosis >> External Pages >> Different car >> Section 176 (Automatic Transmission System (A760H) - Diagnostic Codes (1 Of 3)) >> AUTOMATIC TRANSMISSION SYSTEM (for 2GR-FKS) >> DTC P0500-31: Vehicle Speed Sensor "A" No Signal [10/2017 - ] >> Description

DTC P0500-31: Vehicle Speed Sensor "A" No Signal [10/2017 - ]: Description

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The speed sensors detect the wheel speed and send the appropriate signals to the skid control ECU. The skid control ECU converts these wheel speed signals into a 4-pulse signal and outputs it to the ECM via the combination meter assembly. The ECM determines the vehicle speed based on the frequency of these pulse signals.

Fig 1: Skid Control ECU Into 4-Pulse Signal
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DTC No. Detection Item DTC Detection Condition Trouble Area MIL Memory Note
P0500-31 Vehicle Speed Sensor "A" No Signal All of the following conditions are met (1-trip detection logic):
  • Park/neutral position switch D input signal is ON.
  • Vehicle speed is 9 km/h (6 mph) or more.
  • Any of the following conditions are met:
    1. Vehicle being driven in 1st gear:

      Transmission revolution sensor (NT) value is 1080 rpm or more.

    2. Vehicle being driven in 2nd gear:

      Transmission revolution sensor (NT) value is 630 rpm or more.

    3. Vehicle being driven in 3rd gear:

      Transmission revolution sensor (NT) value is 430 rpm or more.

    4. Vehicle being driven in 4th gear:

      Transmission revolution sensor (NT) value is 310 rpm or more.

    5. Vehicle being driven in 5th gear:

      Transmission revolution sensor (NT) value is 300 rpm or more.

    6. Vehicle being driven in 6th gear:

      Transmission revolution sensor (NT) value is 300 rpm or more.

  • No vehicle speed signal is transmitted to the ECM for 5 seconds.
  • Open or short in vehicle speed signal circuit
  • Combination meter assembly
  • Skid control ECU (Brake control system)
  • ECM
Comes on DTC stored SAE Code: P0500
DTC DETECTION CONDITION PATTERNS:

  Vehicle Condition
Pattern 1 Pattern 2 Pattern 3 Pattern 4 Pattern 5 Pattern 6
Diagnostic Condition Park/neutral position switch D input signal is ON. ◦ ◦ ◦ ◦ ◦ ◦
Vehicle speed is 9 km/h (6 mph) or more. ◦ ◦ ◦ ◦ ◦ ◦
When the vehicle is being driven in 1st gear, the transmission revolution sensor (NT) value is 1080 rpm or more. ◦ - - - - -
When the vehicle is being driven in 2nd gear, the transmission revolution sensor (NT) value is 630 rpm or more. - ◦ - - - -
When the vehicle is being driven in 3rd gear, the transmission revolution sensor (NT) value is 430 rpm or more. - - ◦ - - -
When the vehicle is being driven in 4th gear, the transmission revolution sensor (NT) value is 310 rpm or more. - - - ◦ - -
When the vehicle is being driven in 5th gear, the transmission revolution sensor (NT) value is 300 rpm or more. - - - - ◦ -
When the vehicle is being driven in 6th gear, the transmission revolution sensor (NT) value is 300 rpm or more. - - - - - ◦
Malfunction Condition No vehicle speed signal is transmitted to the ECM. ◦ ◦ ◦ ◦ ◦ ◦
Duration 5 seconds or more 5 seconds or more 5 seconds or more 5 seconds or more 5 seconds or more 5 seconds or more
Detection Logic 1-trip detection logic 1-trip 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.