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Home >> Suzuki >> 2003 >> XL-7 Base, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 4 (Engine Controls - Self-Diagnostics) >> Malfunction Indicator Lights >> Reduced Power Lamp On Steady >> Diagnostic Procedure
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Diagnostic Procedure

WARNING: This page is about a different car, the 2002 Isuzu Trooper. However, it is still accessible from the selected car via links, so may be relevant.
  1. Perform ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. After performing OBD-II system check, go to next step.
  2. Turn ignition off. Disconnect PCM 80-pin harness connectors E-21 (Blue) and E-22 (Red). PCM is located at right rear of engine compartment. Turn ignition on. If RPL illuminates, go to next step. If RPL does not illuminate, go to step  5.
  3. Turn ignition off. Disconnect instrument panel cluster (I-9 30-pin "S" models; I-10 22-pin all others) harness connector. Check for short to ground in Red/White wire (RPL control circuit) between PCM harness connector and instrument panel cluster. See WIRING DIAGRAMS article. If problem is found, repair as necessary. After repair, repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. If no problem is found, go to next step.
  4. Replace instrument panel cluster. See appropriate INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT. Repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  5. Turn ignition off. Reconnect PCM harness connectors. Turn ignition on. Reprogram EEPROM. See EEPROM PROGRAMMING PROCEDURE  under POWERTRAIN CONTROL MODULE. Using scan tool, select output controls function, and command RPL OFF. If RPL turned off, repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM. If RPL did not turn off, go to next step.
  6. Replace and reprogram PCM. See POWERTRAIN CONTROL MODULE REPLACEMENT  under POWERTRAIN CONTROL MODULE. After repair, repeat OBD-II system check. See ON-BOARD DIAGNOSTIC II SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
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