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Home >> Cadillac >> 1996 >> Eldorado Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P1371 - Ignition Control (Ic) Module 4X Reference Circuit Too Few Pulses >> Diagnostic Procedures
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Diagnostic Procedures

  1. Perform On-Board Diagnostic (OBD) System Check. After performing OBD system check, go to next step.
  2. Using scan tool, check if DTC(s) P0322 or P1302 is also present. If DTC(s) are present, diagnose affected DTC(s) first. If DTC(s) are not present, go to next step.
  3. Check for possible sources of Electromagnetic Interference (EMI), such as spark wires routed too close to IC module, high power transmitter operating in the vicinity or a battery charger causing EMI. Correct problem, if present. If EMI is not present, go to next step.
  4. Clear DTC(s) and retest. If DTC P1371 resets, go to next step. If DTC does not reset, fault is not present. See DIAGNOSTIC AIDS.
  5. Check fuel control circuit terminal contact in IC module connector C4 and PCM harness connector C2. Check for possible open or short in fuel control signal circuit. Repair as necessary. If terminal contacts or circuits are okay, go to next step.
  6. Replace IC module.
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