Circuit/System Verification

WARNING: This page is about a different variant/trim than selected.

Ignition ON/Vehicle in Service Mode
Verify DTC P0502, P0503, P0721, P0722, P0723, P077C, P077D, P2160 or P2161 is not set as current or in history
- If any of the DTCs are set.
  Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If none of the DTCs are set
Ignition ON, engine running for greater than 1 min.
Ignition OFF for greater than 2 min, key out of the ignition/keyless start transmitter 1 m (3 ft) away from the vehicle and all vehicle systems OFF.
Ignition ON/Vehicle in Service Mode
Verify DTC P17D4, P185F, P279A, P279B, P279C is only set as a history DTC.
- If any of the DTCs are set as current.
  Refer to Circuit/System Testing below
- If any of the DTCs are only set as history.
  Refer to Diagnostic Aids
- Go to next step: If none of the DTCs are set
Clear All Vehicle DTCs.
Drive the vehicle at a speed greater than 10 km/h (6 mph) and verify the following parameters match the actual vehicle speed and each other. Both parameters should show a smooth/steady curve when viewed in graph form:
- Transmission OSS scan too parameter in the Transmission Control Module scan tool data list
- Transfer Case OSS scan too parameter in the Engine Control Module scan tool data list
- If the above parameters do not match or are not smooth
  A fault exists with the B14S Transmission Output Shaft Speed Sensor or the B115 Vehicle Speed Sensor. Refer to Diagnostic Trouble Code (DTC) List - Vehicle .
- Go to next step: If the above parameters match and are smooth
All OK.