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Diagnosis & Repair Procedure

NOTE: For better performance and results of this diagnostic procedure, usage of appropriate wiring diagram is recommended. See ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL.
NOTE: Perform all voltage and resistance tests using a Digital Volt-Ohm Meter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use an ohmmeter to isolate wiring harness shorts or opens.
  1. Turn ignition switch to LOCK position. Connect SUZUKI scan tool or equivalent to a 16-pin Data Link Connector (DLC), located below left side of instrument panel. See Figure . Start engine. Using scan tool, retrieve DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If no DTCs are retrieved, go to next step. If any DTC is retrieved, perform engine system check. See A4: ENGINE SYSTEM CHECK  . After repair, retest system for normal operation.
  2. Turn ignition switch to LOCK position. Disconnect ECM 35-pin harness connector E61, located under instrument panel, behind glove box. See Figure . Turn ignition switch to ON position. If MIL remain OFF, substitute ECM (PCM) with a known good unit and retest system for normal operation. If MIL comes ON, repair short to ground in Purple/Yellow wire between ECM (PCM) and instrument cluster. After repair, retest system for normal operation.
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