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Home >> Dodge and Ram >> 1992 >> Pickup D150, 2D Pickup Extra Cab, Standard >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - Diesel >> Computerized Engine Controls >> Single Board Engine Controls >> Hardness Check

Hardness Check

  1. If SBEC is found to be faulty during SELF-DIAGNOSTICS testing, perform following steps to confirm diagnosis. Most components are incorrectly diagnosed due to faulty electrical connectors or poor connections between component and vehicle. Sometimes simply disconnecting and connecting an electrical component will provide a good electrical connection.
  2. Before replacing an SBEC, check all components in suspected circuit. If components are okay, carefully disconnect SBEC from vehicle harness.
  3. Inspect SBEC harness connector and SBEC contact pins for corrosion. Clean harness connector and SBEC contact pins with contact cleaner. Inspect SBEC harness connector for bent pins, missing pins and broken wires. Repair or replace as necessary.
  4. Using a ohmmeter, check for continuity between chassis ground and SBEC harness connector pins No. 5, 11 and 12. If continuity does not existing all pins, repair open circuit in affected wire. See appropriate L- WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.
  5. Connect negative voltmeter lead to chassis ground and positive pin lead to No. 57. If battery voltage does not exist, repair open circuit between SBEC and battery.
  6. Turn ignition on. Connect negative voltmeter lead to chassis ground and positive pin lead to No. 9. If battery voltage does not exist, repair open circuit between SBEC and ignition switch. See appropriate L- WIRING DIAGRAMS article in the ENGINE PERFORMANCE Section.
  7. Connect SBEC harness connector to SBEC, and retest system using Diagnostic Readout Box (DRB-II) or similar scanning tool. See G- DIESEL TEST W/ CODES article in the ENGINE PERFORMANCE Section. If vehicle does not pass test and fails with same message, replace SBEC.
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