Component Testing
IMPORTANT:
You must perform the Circuit/System Testing before proceeding with the Component Testing.
- Ignition ON, remove the MAP sensor.
- Install a 3A fused jumper wire between the 5-volt reference circuit terminal C and the corresponding terminal of the MAP sensor.
- Install a jumper wire between the low reference terminal A of the MAP sensor and ground.
- Install a jumper wire at the signal terminal B of the MAP sensor.
- Connect a DMM between the jumper wire from terminal B of the MAP sensor and ground.
- Install a J 23738-A
or J 35555
to the MAP sensor vacuum port. Slowly apply vacuum to the sensor while monitoring 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.