LEMON Manuals: Even more car manuals for everyone
Home >> Infiniti >> 2011 >> G37 IPL, Standard >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 61 (Automatic Transmission -- G37 Coupe) >> DTC/Circuit Diagnosis >> DTC P1721: Vehicle Speed Signal >> DTC Logic >> DTC Detection Logic

DTC Detection Logic

WARNING: This page is about a different variant/trim than selected.
DTC DETECTION LOGIC REFERENCE CHART

DTC Trouble diagnosis name DTC is detected if... Possible cause
P1721 Vehicle Speed Signal Circuit
  • The vehicle speed transmitted from the unified meter and A/C amp. to TCM is 5 km/h (3MPH) or less when the vehicle speed detected by the output speed sensor is 20 km/h or more. (Only when starts after the ignition switch is turned ON.)
  • The vehicle speed detected by the output speed sensor does not decrease despite the 36 km/h (23 MPH) or more of deceleration in vehicle speed received from the unified meter and A/C amp. when the vehicle speed transmitted from the unified meter and A/C amp. to TCM is 36 km/h (23 MPH) or more and the vehicle speed detected by the output speed sensor is 24 (15 MPH) or more.
 Harness or connectors (Sensor circuit is open or shorted.)
scientia non olet · About LEMON Manuals