Fuel Injectors

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2002 Mitsubishi Montero Sport, 2002 Mitsubishi Montero, 2002 Mitsubishi Mirage, 2002 Mitsubishi Lancer, and 2002 Mitsubishi Galant. However, it is still accessible from the selected car via links, so may be relevant.

Listen to injectors during cranking and at idle. They should make ticking sound. Frequency of sound should increase as engine speed increases.
Disconnect injector 2-pin connector at injector. Check resistance between injector terminals. Injector resistance should be 13-16 ohms at 68°F (20°C). On engines with inaccessible injector connectors, check resistance at the injector intermediate connector. To test right bank injectors on Eclipse 3.0L and Galant 3.0L, disconnect right bank injector intermediate 4-pin connector. To test all injectors on Montero and Montero Sport, disconnect injector intermediate 8-pin connector. To test all injectors on Diamante, disconnect injector intermediate 12-pin connector. Check resistances between indicated terminals. See INJECTOR CHECK AT INJECTOR INTERMEDIATE CONNECTOR table.
If using lab scope, connect lab scope pick-up to ECM/PCM side (ground side) of injector circuit. Start engine. Compare waveform to normal waveform. See Fig 1.
To test injector circuit, see DTC P0201-P0204: INJECTORS NO. 1-4 CIRCUIT MALFUNCTION or DTC P0201-P0206: INJECTORS NO. 1-6 CIRCUIT MALFUNCTION in appropriate SELF-DIAGNOSTICS article.

INJECTOR CHECK AT INJECTOR INTERMEDIATE CONNECTOR

Application	Injector No.	Check Between Intermediate Connector Terminals No.
Diamante (Both Banks)
.....	1	6 & 12
.....	2	6 & 5
.....	3	6 & 11
.....	4	6 & 4
.....	5	6 & 10
.....	6	6 & 3
Eclipse & Galant 3.0L (Right Bank)
.....	1	1 & 2
.....	3	1 & 3
.....	5	1 & 4
Montero & Montero Sport (Both Banks)
.....	1	8 & 3
.....	2	8 & 2
.....	3	8 & 1
.....	4	8 & 7
.....	5	8 & 6
.....	6	8 & 5

Fig 1: Identifying Normal Injector Waveform

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.