Overall Function Test
Raise drive wheels and support vehicle. Start engine and warm to operating temperature. Turn ignition off and wait 5 seconds. Start engine and idle for at least 70 seconds. Using DVOM, measure and record voltage between PCM harness connector terminals No. 67 (positive lead) and terminal No. 43 (negative lead) by backprobing. See Figure. While monitoring voltage, maintain the following conditions for at least 1 minute:
- A/C On
- Steering Wheel Turned Fully
- Headlights On
- Rear Window Defogger On
- Engine Speed At 3000 RPM
- Transmission In Any Forward Gear
Ensure voltage remains at least .1 volt less than voltage measured at idle.
NOTE:
If both DTC P0510 and P1447 are retrieved, diagnose and repair DTC P0510 before proceeding with DTC P1447 repair procedures.