Ground Circuit Inspection

Checking the circuit of MAP ground line is to find whether there is open or short circuit in MAP harness.

1. Ignition "OFF"
2. Disconnect MAP sensor connector.
3. Ignition "ON" & Engine "OFF"
4. Measure voltage or resistance between terminal 4 of sensor harness connector and chassis ground.

   Specification: below 0.5V or below 1Ω

   Fig 1: Measuring Voltage Between Terminal 4 Of Sensor Harness Connector And Chassis Ground

   Courtesy of HYUNDAI MOTOR CO.
5. Is measure voltage or resistance within Specification?

   YES 

   • Go to "COMPONENT INSPECTION " procedure.

   NO 

   • Open circuit between MAP harness connector and ECM harness connector.
   • Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure
     NOTE:

     1. In case, when MAP connector is disconnected, the resistance of MAP terminal 4 is infinite.
        • Possible cause: Open or short between terminal 36 of PCM and Terminal 4 of MAP