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Home >> Geo >> 1990 >> Metro XFi >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests >> Computerized Engine Controls >> Electronic Control Module (ECM) >> ECM Circuit Resistance (Tracker)
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ECM Circuit Resistance (Tracker)

Before installing ECM, resistance of designated circuits should be checked or ECM may be damaged. See ECM CIRCUIT RESISTANCE  table. Check resistance with ignition off, connector installed on components and connector removed from ECM.

ECM CIRCUIT RESISTANCE

Circuit (1) ECM Connector Terminals (Wire Colors) Ohms
Control Relay G16-G11 (Pink & Black/Yellow) 114-140
EGR & Throttle Opener VSV G5-G14 (Lt. Green/Yellow & Lt. Green/White) 70-80
Fuel Injector G8-G17 (Red & Yellow) 1-2
ISC Solenoid Valve G6-G15 (Lt. Green & Black/Blue) 5-7
Lock-Up Relay & PTC Heater Relay Y10-Y11 (White/Blue & White/Yellow) 180-220
(1) For ECM terminal identification, see appropriate wiring diagram in WIRING DIAGRAMS article.