Retrieving Codes

NOTE: Ensure battery voltage is proper before retrieving codes.

Turn ignition switch to OFF position. Connect either a voltmeter between MPI diagnostic terminal and ground terminal of diagnostic connector, or multi-use tester (scan tool) to diagnostic connector and cigarette lighter. See Fig 1 . Turn ignition switch to ON position and disclosure of ECU memory (fault codes) will begin.

Fig 1: Locating Self-Diagnostic Connector
Courtesy of HYUNDAI MOTOR CO.
If using voltmeter to retrieve fault codes, it is important that voltage signals are accurately timed. Signals will appear in long and short pulses. Long pulses represent a numeral 10, whereas short pulses represent a numeral one. An example of fault code 15 would be one long pulse along with 5 short pulses.
If using scan tool, and malfunction indicator light comes on while various checks are being made, check self-diagnostic output.
After all checks have been made and/or trouble codes recorded, make necessary repairs. After repairs have been made, retest component(s) to ensure problem has been corrected.

DIAGNOSTIC CODE - EXCEL ⁽¹⁾

Code Number

Fault Item

⁽²⁾ Probable Cause

See:

O2 Sensor

Fuel Pres., Injectors, Vacuum Leak, O2 Sensor

Figure

Airflow Sensor

Figure

Intake Air Temperature Sensor

Figure

Throttle Position Sensor

Throttle Position Sensor, Idle Switch

Figure and Figure

Motor Position Sensor

Figure

Coolant Temperature Sensor

Figure

Crank Angle Sensor

Figure and Figure

TDC Sensor (No. 1 Cylinder)

Distributor

Vehicle Speed Sensor Reed Switch

Barometric Pressure Sensor

Figure

Fuel Injector

Injector Coil Resistance

Figure and Figure

Fuel Pump

Control Relay

Figure

EGR Temperature Sensor (Calif. Only)

EGR Temp. Sensor, Vlv., Ctrl. Sol., Ctrl. Vac.

Figure

⁽¹⁾	No fault codes in memory will be indicated by 9 short voltmeter pulses. Faulty ECU will be indicated by a continuous voltage reading on voltmeter.

⁽²⁾	Component, harness and connector are always a probable cause for setting a fault code.

DIAGNOSTIC CODE - SONATA 2.4L ⁽¹⁾

Code Number

Fault Item

⁽²⁾ Probable Cause

See:

O2 Sensor

Fuel Pres., Injectors, Vacuum Leak, O2 Sensor

Figure

Airflow Sensor

Figure

Intake Air Temperature Sensor

Figure

Throttle Position Sensor

Throttle Position Sensor, Idle Switch

Figure

Motor Position Sensor

Figure and Figure

Coolant Temperature Sensor

Figure

Crank Angle Sensor

Figure and Figure

TDC Sensor (No. 1 Cylinder)

Distributor

Vehicle Speed Sensor Reed Switch

Barometric Pressure Sensor

Figure

Fuel Injector

Injector Coil Resistance

Figure and Figure

Fuel Pump

Control Relay

Figure

EGR Temperature Sensor (Calif. Only)

EGR Temp. Sensor, Vlv., Ctrl. Sol., Ctrl. Vac.

Figure

⁽¹⁾	No fault codes in memory will be indicated by 9 short voltmeter pulses. Faulty ECU will be indicated by a continuous voltage reading on voltmeter.

⁽²⁾	Component, harness and connector are always a probable cause for setting a fault code.

DIAGNOSTIC CODE - SONATA 3.0L ⁽¹⁾

Code Number

Fault Item

⁽²⁾ Probable Cause

See:

O2 Sensor

Fuel Pres., Injectors, Vacuum Leak, O2 Sensor

Figure

Airflow Sensor

Figure

Intake Air Temperature Sensor

Figure

Throttle Position Sensor

Throttle Position Sensor, Idle Switch

Figure

Coolant Temperature Sensor

Figure

Crank Angle Sensor

Figure and Figure

TDC Sensor (No. 1 Cylinder)

Distributor

Vehicle Speed Sensor Reed Switch

Barometric Pressure Sensor

Figure

Fuel Injector

Injector Coil Resistance

Figure and Figure

Fuel Pump

Control Relay

Figure

EGR Temperature Sensor (Calif. Only)

EGR Temp. Sensor, Vlv., Ctrl. Sol., Ctrl. Vac.

Figure

⁽¹⁾	No fault codes in memory will be indicated by 9 short voltmeter pulses. Faulty ECU will be indicated by a continuous voltage reading on voltmeter.

⁽²⁾	Component, harness and connector are always a probable cause for setting a fault code.