Signal Circuit Inspection

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

Ignition "OFF"
Disconnect MAP sensor connector.
Ignition "ON" & Engine "OFF"
Measure voltage between terminal 1 of sensor harness connector and chassis ground.
Specification: approximately 5V

Fig 1: Measuring Voltage Between Terminal 1 Of Sensor Harness Connector And Chassis Ground
Courtesy of HYUNDAI MOTOR CO.
Is measure voltage within Specification?
YES
- Go to "GROUND CIRCUIT INSPECTION " procedure.
NO
- Open circuit or short circuit to chassis ground between MAP harness connector and signal circuit.
- Open circuit between MAP harness connector and ECM harness connector.
- Repair as necessary and then go to "VERIFICATION OF VEHICLE REPAIR " procedure.

NOTE: In case, when MAP connector is disconnected, the voltage of MAP terminal 1 is 0 V.