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Home >> Suzuki >> 2003 >> XL-7 Base, RWD >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Diagnostic Tests >> DTC P0616: Starter Signal Circuit - Low >> Diagnosis & Repair Procedure
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Diagnosis & Repair Procedure

  1. If engine system check has been performed, go to next step. If engine system check has not been performed, go to A4: ENGINE SYSTEM CHECK  under SYSTEM TESTS.
  2. Access ECM. ECM is located under instrument panel, behind glove box. See Figure. Turn ignition on. Backprobing at ECM, measure voltage between ground and ECM connector C51-1 terminal No. 24 (Black/Yellow wire). See Figure. While cranking engine voltage should be 6-14 volts. If voltage reading is not as specified, go to next step. If voltage reading is as specified, go to step  4.
  3. Turn ignition off. Disconnect ECM connectors C51-1 and C51-3. Measure resistance between ECM connector C51-1 terminal No. 24 (Black/Yellow wire) and ECM connector C51-3 terminal No. 6 (Black/Orange wire). If resistance is less than 100 ohms, replace ECM. After repair, repeat DTC CONFIRMATION TEST . If DTC does not reset, testing is complete. If resistance is not less than 100 ohms, check for and repair open or high resistance in Black/Yellow wire between starter, transmission range switch (A/T) or clutch pedal position switch (M/T) and ECM. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. After repair, repeat DTC CONFIRMATION TEST . If DTC does not reset, testing is complete.
  4. Turn ignition off. Disconnect ECM 28-pin harness connector C51-1. ECM is located under instrument panel, under glove box. See Figure. Check for poor terminal contact at ECM harness connector C51-1. If problem is found, repair as necessary. After repair, repeat DTC CONFIRMATION TEST . If terminal contact is okay, problem is probably intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article. If intermittent problem is not found, substitute a known-good ECM, and repeat DTC CONFIRMATION TEST  procedure. If DTC does not reset, testing is complete.
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