Signal Circuit Inspection

Check for short to ground in harness
1. Ignition "OFF"
2. Disconnect MAP sensor connector and ECM connector.
3. Ignition "ON" & Engine "OFF"
4. Measure resistance between terminal 1 of sensor harness connector and chassis ground.
5. Measure resistance between terminal 1 and 4 of sensor harness connector
  Specification: infinite
  
  Fig 1: Measuring Resistance Between Terminal 1 And 4 Of Sensor Harness Connector
  Courtesy of HYUNDAI MOTOR CO.
6. Is measure resistance within Specification?
  Yes
7. - Go to "COMPONENT INSPECTION " procedure.
8. - Short circuit to chassis ground between MAP harness connector and signal circuit.
  - Short circuit to ground between MAP harness connector and signal circuit.
  - Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.