Manifold Absolute Pressure (Map) Sensor
- MAP sensor is located on firewall. With ignition on, check supply voltage from ECM to MAP sensor on designated wire terminal. See MAP SENSOR WIRE TERMINAL IDENTIFICATION table. Reading should be about 5 volts.
- Disconnect vacuum hose at MAP sensor. Install hand-held vacuum pump. Turn ignition on. Check signal voltage at designated wire terminal of MAP sensor. See MAP SENSOR WIRE TERMINAL IDENTIFICATION table.
- Apply vacuum, and note change in signal voltage. As vacuum reading changes, signal voltage should change. Reading should be about 1-1 1/2 volts at high vacuum (idle position) to 4-4 1/2 volts at low vacuum (full throttle position).
MAP SENSOR WIRE TERMINAL IDENTIFICATION
| Application | Supply Voltage Wire Color | Signal Voltage Wire Color |
|---|---|---|
| Storm | Blue/Orange | Gray/Red |