LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Saab >> 2001 >> 9-5 Base, 4D Sedan, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Self-Diagnostics >> Fault Code Diagnosis >> P1313: Combustion Detection Bank 1 - Open Circuit/Short To B+ >> Fault Isolation Procedure
October 30: LEMON manuals on a temporary server, it is slow and having issues, download the manuals you need! Later in November we will switch back to the fast server.

Fault Isolation Procedure

  1. Checking the control module's signal input for cylinders 1 + 2/cylinder bank 1.
    • Unplug the connector: Ignition discharge module, Bank 1 (346R).
    • Take out pin 4.
    • Plug in the connector: Ignition discharge module, Bank 1 (346R).
    • Start the engine and run it at idling speed.
    • Contact ECM.
    • Read value: Combustion Detection Cyl 1 + 2 / Bank 1.
    If the diagnostic tool shows a reading of 100, go to next step, otherwise go to step  3.
  2. Checking the control module's signal input for cylinders 1 + 2/cylinder bank 1 (continued).
    • Connect a jumper lead between pin 4 (which is loose) and a good grounding point.
    • Read value: Combustion Detection Cyl 1+2 / Bank 1.
    If the diagnostic tool shows a reading of 0, go to step  4, otherwise go to next step.
  3. Rectifying the lead: The lead from pin 4 of the female connector to pin 53 of the control module is faulty. Rectify the fault and go to step  5.
  4. Changing components: Change Ignition discharge module, Bank 1. When finished, go to next step.
  5. Final check:
    • Clear the DTCs in all systems.
    • Carry out a drive cycle: Drive the car at varying engine loads and engine RPM for 5 minutes.
    • Evaluate the drive cycle: Check that the DTC has not recurred.
    If the trouble code has recurred, the ECM is probably at fault and will need replacement. Replace with known-good ECM and retest. if no DTCs are present, then the steps taken to rectify the fault were correct.
Fig 1: Ignition Discharge Module Circuit To ECM (V6)
G00207431Courtesy of SAAB-SCANIA OF AMERICA, INC.
scientia non olet · About LEMON Manuals