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Harness Inspection

  1. Measure injector power supply voltage. Disconnect injector harness connectors. Turn ignition on. Using DVOM, measure voltage at each injector harness connector terminal No. 1 (Black/Red wire) on Sonata V6, No. 2 (Red wire) on Sonata 4-Cylinder, No. 2 (Green/White wire) on all other models. If voltage measured is less than battery voltage, inspect and repair circuit(s) as needed.
  2. Check continuity of injector ground circuit. Disconnect ECM harness connector. Ensure ignition is off. Connect a jumper wire between each injector ECM terminal and ground. Disconnect injector harness connectors. Using ohmmeter, check continuity between each injector terminal and vehicle ground. See FUEL INJECTOR GROUND CIRCUIT IDENTIFICATION  table for ECM terminal numbers and wire colors.
FUEL INJECTOR GROUND CIRCUIT IDENTIFICATION

Injector Number Wire Color Corresponding (1) ECM Terminal No.
Elantra, Excel (Fed.), Sonata 4-Cyl.
1 Yellow 9
2 Yellow/Black 8
3 Lt. Green 18
4 Lt. Green/White 17
Excel (Calif.)
1 Yellow 13
2 Yellow/Black 26
3 Green/Black 12
4 Lt. Green/White 25
Sonata V6
1 Yellow/Green 4
2 Yellow/Black 5
3 Yellow/Blue 6
4 Yellow/Red 7
5 Yellow/White 8
6 Yellow 9
(1) Use 18-pin connector on all models except Excel (California). On Excel (California) use 26-pin connector. See Figure , Figure and Figure for terminal identification.
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