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Visual Inspection and Diagnostic Pre-checks

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NOTE: Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may cause damage to the connector.
  1. CC1: CHECK THE PCM DTCS 
    • Ignition ON, engine OFF.
    • Carry out the PCM KOEO self-test.
    • Is DTC P103D present? 
      Yes No
      Go to  CC2. For DTC P103E, Go to  CC4.
      For DTC P103C, Go to  CC5.
      For all others, No fault found.
      REFER to applicable Electronic Engine Controls article
  2. CC2: CHECK FOR VOLTAGE TO THE ASPIRATOR VALVE 
    • Ignition OFF.
    • VSV connector disconnected.
    • Ignition ON, engine OFF.
    • Measure the voltage between:
      (+) VSV Connector, Harness Side (-)
      B+ Ground
    • Is the voltage greater than 11 V? 
      Yes No
      Go to  CC3. VERIFY BJB fuse 36 (10A) is OK.
      If the fuse is OK, REPAIR the circuit.
      If the fuse is OK, REFER to the OEM Wiring Diagrams article to identify the cause of the circuit short.
  3. CC3: CHECK THE ASPIRATOR VALVE CONTROL CIRCUIT FOR A SHORT TO GROUND 
    • Ignition OFF.
    • Measure the resistance between:
      (+) VSV Connector, Harness Side (-)
      VSV Ground
    • Is the resistance greater than 10 kOhm? 
      Yes No
      Go to  CC4. REPAIR the circuit.
  4. CC4: CHECK THE ASPIRATOR VALVE CONTROL CIRCUIT FOR A SHORT TO VOLTAGE 
    • Ignition OFF.
    • VSV connector disconnected. (if not previously disconnected)
  5. CC5: CHECK THE ASPIRATOR VALVE CONTROL CIRCUIT FOR AN OPEN 
    • Ignition OFF.
    • VSV connector disconnected. (if not previously disconnected)
  6. CC6: VERIFY ALL WIRING CONNECTIONS 
    • Using a good light source, inspect all disconnected electrical connectors for the following:
      • corrosion - install new connector or terminal and clean the module pins
      • damaged or bent pins - install new terminals or pins
      • pushed-out pins - install new pins as necessary
      • spread terminals - install new terminals as necessary
    • Are the connectors free of corrosion, damaged pins, bent pins, pushed-out pins and spread terminals? 
      Yes No
      Go to  CC7. REPAIR the connector or terminals.
      REFER to OEM GROUND DISTRIBUTION article for schematic and connector information.
  7. CC7: VERIFY SYSTEM OPERATION 
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