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Home >> Suzuki >> 2006 >> XL-7 Base, 4WD, Automatic >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> Inspection of ECM and Its Circuits >> Resistance Check
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Resistance Check

  1. Disconnect couplers (1) from ECM with ignition switch OFF.
    CAUTION: Never touch terminals of ECM itself or connect voltmeter or ohmmeter (2).
  2. Check resistance between each pair of terminals of disconnected couplers (1) as listed in the following table.
    CAUTION:
    • Be sure to connect ohmmeter (2) probe from wire harness side of coupler.
    • Be sure to turn OFF ignition switch for this check.
    • Resistance in table represents that when parts temperature is 20 °C (68 °F).
      Fig 1: Identifying Couplers & Ohmmeter
      G04721060Courtesy of SUZUKI OF AMERICA CORP.
CONNECTOR TERMINAL RESISTANCE SPECIFICATION

Terminals Circuit Standard resistance Condition
C51-3-7 and C51-3-20 A/C compressor clutch relay (if equipped) 160 - 240 Ω Battery disconnected and ignition switch ON
E61-9 and E61-2 Main relay 160 - 240 Ω -
E61-22 and C51-3-20 A/C fan motor relay (if equipped) 160 - 240 Ω Battery disconnected and ignition switch ON
E61-23 and C51-3-20 Fuel pump relay 160 - 240 Ω -
C51-3-6 and Body ground Ground Continuity -
C51-3-17 and Body ground Ground Continuity -
C51-2-1- and C51-3-4 Fuel injector No.2 13 - 16 Ω -
C51-2-2- and C51-3-4 Fuel injector No.1
C51-1-5- and C51-3-4 IAC valve (stepper motor coil 1) 25.5 - 33.5 Ω -
C51-2-4 and C51-2-5 Heater of HO2S-1 10.0 - 12.8 Ω -
C51-2-16 and C51- 2-17 Heater of HO2S-2 23.4 - 28.6 Ω -
C51-3-18 and C51-3-4 EVAP canister vent valve 25 - 30 Ω -
C51-2-8 and C51-3-4 Fuel injector No.4 13 - 16 Ω -
C51-2-9 and C51-3-4 Fuel injector No.3
C51-2-21 and C51-3-4 Fuel injector No.6
C51-2-22 and C51-3-4 Fuel injector No.5
C51-1-16 and C51-3-4 IAC valve (stepper motor coil 4) 25.5 - 33.5 Ω -
C51-1-17 and C51-3-4 IAC valve (stepper motor coil 3)
C51-1-4 and C51-3-4 IAC valve (stepper motor coil 2)
C51-2-12 and C51-3-4 EGR valve (stepper motor coil 4) 20 - 24 Ω -
C51-2-13 and C51-3-4 EGR valve (stepper motor coil 3)
C51-2-14 and C51-3-4 EGR valve (stepper motor coil 2)
C51-2-15 and C51-3-4 EGR valve (stepper motor coil 1)
C51-1-15 and C51-3-4 EVAP canister purge valve 28 - 35 Ω -
C51-2-7 and Body ground Ground Continuity -
E61-21 and C51-3-4 Vacuum solenoid valve for IMT valve 33 - 39 Ω -
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