Component Testing
IMPORTANT:
You must perform the Circuit/System Testing in order to verify the integrity of the MAP sensor circuits before proceeding with the Component Testing.
- Turn ON the ignition, with the engine OFF, and remove the MAP sensor.
- Install a 3A fused jumper wire between the 5-volt reference circuit pin C and the corresponding terminal of the MAP sensor.
- Install a jumper wire between the low reference circuit pin A of the MAP sensor and ground.
- Install a jumper wire to the MAP sensor signal circuit pin B.
- Connect a DMM between the jumper wire from the MAP sensor signal circuit pin B and ground.
- Install the J-35555
to the MAP sensor vacuum port. See Special Tools
. Slowly apply vacuum to the sensor while observing the voltage on the DMM. The voltage should vary between 0-5.2 volts without any spikes or dropouts.
- If the voltage is not within the specified range or is erratic, replace the MAP sensor.