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Home >> Mazda >> 2003 >> Tribute LX, 4WD >> Repair and Diagnosis >> External Pages >> Different car >> Section 26 (Engine Controls - Self-Diagnostics) >> Diagnostic Tests >> DTC P1634: Generator Terminal "B" Circuit Open >> Diagnosis & Repair Procedure

Diagnosis & Repair Procedure

WARNING: This page is about a different car, the 2002 Mazda Protege5 and 2002 Mazda Protege. However, it is still accessible from the selected car via links, so may be relevant.
  1. Turn ignition off. Connect scan tool to DLC-2. Turn ignition on, engine off. Check service bulletins for repair information related to this DTC. If repair information is not available, go to next step. If repair information is available, perform diagnosis and repair as necessary. After repair, go to step  6.
  2. Turn ignition switch off. Check battery operation. If battery is faulty, replace battery. After repair, go to step  6. If battery is okay, go to next step.
  3. Turn ignition switch off. Check generator ring terminal "B" (Black/White wire) for loose installation nut. If no problem is found, go to next step. If ring terminal "B" (Black/White wire) is loose, tighten installation nut. After repair, go to step  6.
  4. Check for loose positive battery cable. If no problem is found, go to next step. If connection is loose, repair as necessary. After repair, go to step  6.
  5. Reconnect all connectors. Start engine. Disconnect positive battery cable. If engine does not stall, go to next step. If engine stalls, repair open circuit between generator ring terminal "B" (Black/White wire) and positive battery terminal (Black wire). After repair, go to next step.
  6. Reconnect all connectors. Clear DTCs. See CLEARING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. Turn ignition switch off. Start engine. Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If DTC P1634 is present, replace PCM and go to next step. If DTC P1634 is not present, go to next step.
  7. Cycle ignition switch from off to on. Check for DTCs. See RETRIEVING DIAGNOSTIC TROUBLE CODES  under SELF-DIAGNOSTIC SYSTEM. If no other DTCs are present, testing is complete. If any other DTC is present, go to applicable test and repair.
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