Diagnostic Test

CHECK FOR AN ACTIVE DTC
1. Turn the ignition on.
2. Turn the Radio on.
3. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the TESTING FOR AN INTERMITTENT CONDITION procedure. Refer to TESTING FOR AN INTERMITTENT CONDITION .
CHECK FOR PCM DTCS
1. With the scan tool, read PCM DTCs.
2. Check for any Crankshaft related DTCs.
  Were there any Crankshaft DTCs found in the PCM?
  
  Yes
  - Refer to DIAGNOSTIC CODE INDEX and perform the appropriate diagnostic procedure.
  No
  - Go To 3
CHECK THE (X478) ANC BUFFERED CRANK POSITION (+) CIRCUIT AND (X479) ANC BUFFERED CRANK POSITION (-) CIRCUIT FOR AN OPEN
1. Turn the ignition off.
2. Measure the resistance of the (X478) Crankshaft Pulse Signal (+) circuit and (X479) Crankshaft Pulse Signal (-) circuit between the PCM C1 harness connector and the Amplifier harness connector.
  Is the resistance below 3.0 Ohms?
  
  Yes
  - Replace the Amplifier in accordance with the Service information. Refer to AMPLIFIER, REMOVAL AND INSTALLATION .
  - Go To 4
  No
  - Repair the (X478) Crankshaft Pulse Signal (+) circuit or the (X479) Crankshaft Pulse Signal (-) circuit for an open circuit or high resistance.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
CHECK FOR AN ACTIVE DTC
1. With the scan tool, erase DTCs.
2. Turn the Radio on.
3. With the scan tool, read DTCs.
  Is the DTC active?
  
  Yes
  - Replace the PCM in accordance with the service information.
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  No
  - Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  - Test complete.