Resistance Check

Disconnect ECM couplers (1) from ECM with ignition switch OFF.
CAUTION: Never touch terminals of ECM itself or connect voltmeter or ohmmeter (2).

Check resistance between each pair of terminals of disconnected couplers as listed in the following table.

CAUTION:

Be sure to connect ohmmeter probe from wire harness side of coupler.
Be sure to turn OFF ignition switch for this check.
Resistance in the following table represents that when parts temperature is 20°C (68°F).

Fig 1: Checking Resistance Between Connector Terminals

Courtesy of SUZUKI OF AMERICA CORP.

CONNECTOR TERMINAL CHART

Terminals	Circuit	Standard resistance	Condition
C45-3 to C46-10	Heater of HO2S-2	4 - 15 ohm	-
G04-3 to C46-10	Radiator fan motor relay	160 - 240 ohm	-
C45-23 to G04-25	Main relay	160 - 240 ohm	-
C45-17 to C46-10	Fuel pump relay	160 - 240 ohm	-
C45-1 to C46-10	A/C condenser fan motor relay	160 - 240 ohm	Battery disconnected and ignition switch ON
C46-3 to G04-7	No. 3 fuel injector	10.8 - 18.2 ohm	-
C46-4 to G04-7	No. 4 fuel injector	10.8 - 18.2 ohm	-
C46-1 to G04-7	EGR valve (stepping motor No. 1 coil)	20 - 29 ohm	-
C46-30 to G04-7	EVAP canister purge valve	33 - 44 ohm	-
C46-2 to G04-7	No. 2 fuel injector	10.8 - 18.2 ohm	-
C46-18 to G04-7	EGR valve (stepping motor No. 2 coil)	20- 31 ohm	-
C46-19 to G04-7	EGR valve (stepping motor No. 4 coil)
C46-9 to G04-7	EGR valve (stepping motor No. 3 coil)
C46-7 to C46-10	Heater of HO2S-1	2 - 11 ohm	-
C46-1 to G04-7	No. 1 fuel injector	10.8 - 18.2 ohm	-
C46-17 to G04-7	Idle air control valve (stepping motor No. 1 coil)	20 - 24 ohm	-
C46-25 to G04-7	Idle air control valve (stepping motor No. 2 coil)		-
C46-24 to G04-7	Idle air control valve (stepping motor No. 3 coil)		-
C46-31 to G04-7	Idle air control valve (stepping motor No. 4 coil)		-
G04-5 to G04-7	EVAP canister vent valve	25 - 30 ohm	-