LEMON Manuals: Even more car manuals for everyone
Home >> Nissan-Datsun >> 2003 >> Sentra Limited >> Repair and Diagnosis >> External Pages >> Different car >> Section 43 (Engine Controls - System & Component Testing - 4 CYL & V6) >> Engine Sensors & Switches >> Ignition Switch (Start Signal) >> Frontier & Xterra

Frontier & Xterra

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2002 Nissan Xterra, 2002 Nissan Sentra, 2002 Nissan Quest, 2002 Nissan Pathfinder, and 2002 Nissan Maxima. However, it is still accessible from the selected car via links, so may be relevant.
  1. If CONSULT-II is available, go to next step. If CONSULT-II is not available, go to step  3.
  2. Using CONSULT-II in DATA MONITOR mode, observe START SIGNAL under following conditions. See CHECKING START SIGNAL (FRONTIER & XTERRA)  table. If start signal displays as specified, go to step  7. If start signal does not display as specified, go to step  4.
    CHECKING START SIGNAL (FRONTIER & XTERRA)

    Condition Start Signal
    Ignition Switch ON OFF
    Ignition Switch START ON
  3. Backprobing at ECM, measure voltage between ground and ECM terminal No. 20 (Blue/Orange wire). See Figure and Figure . Turn ignition switch to START position. Battery voltage should exist. With ignition switch in any other position, about zero volts should exist. If voltage is as specified, go to step  7. If voltage is not as specified, go to next step.
  4. Check fuse block fuse No. 7 (7.5-amp). Fuse block is located under left side of instrument panel. Replace fuse, if necessary. If fuse is okay, go to next step.
  5. Turn ignition off. Disconnect ECM 124-pin harness connector. For ECM location, see Figure. Remove fuel block fuse No. 7. Check continuity between ECM harness connector terminal No. 20 (Blue/Orange wire) and fuse No. 7 socket cavity. Continuity should exist. Also, check circuit for short to ground and short to voltage. If problem is found, go to next step. If no problem is found, go to step  7.
  6. On 2.4L, check following:
    • Check for poor, loose, corroded or damaged terminal connections in in-line harness connectors E43 and M65. See WIRING DIAGRAMS article.
    • Check for poor, loose, corroded or damaged terminal connections in in-line harness connectors M59 and F27.
    • Check for open or short in Brown/White wire between ignition coil and ignition switch.
    On 3.3L, check following:
    • Check for poor, loose, corroded or damaged terminal connections in in-line harness connectors M81 and F36. See WIRING DIAGRAMS article.
    • Check for poor, loose, corroded or damaged terminal connections in fuse block harness connectors M26.
    • Check for open or short in Brown/White wire between ECM and fuse block.
    If problem is found, repair as necessary. After repair, retest system.
  7. No problem is indicated at this time. Problem may be intermittent. See INTERMITTENTS in TROUBLE SHOOTING - NO CODES article.
scientia non olet · About LEMON Manuals