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Home >> Chevrolet >> 1998 >> Venture Base, Van Cargo Extended >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - Tests W/Codes >> Diagnostic Trouble Codes >> DTC P1653 - Fuel Level Output Control Circuit >> Diagnostic Procedures

Diagnostic Procedures

  1. Perform POWERTRAIN ON-BOARD DIAGNOSTIC (OBD) SYSTEM CHECK , then go to next step.
  2. Check instrument cluster system. Repair or replace as necessary. After checking instrument cluster, go to next step.
  3. Turn ignition off. Disconnect PCM harness connector. Turn ignition on, engine off. Check voltage between ground and fuel level output circuit at PCM harness connector. If battery voltage is present, go to next step. If battery voltage is not present, go to step 7).
  4. Check current, at least twice, between affected PCM output circuit and ground. If current reads 0.05-1.50 amps, go to step 12). If current does not read 0.05-1.50 amps, go to next step.
  5. Turn ignition off. Disconnect instrument panel cluster. Leave PCM disconnected. Turn ignition on. Check voltage between fuel level output circuit and ground. If voltage reads zero volts, go to step 15). If voltage does not read zero volts, go to next step.
  6. Locate and repair short to voltage in affected PCM output circuit. After repairs, go to step 17).
  7. Check ignition feed fuse for instrument panel cluster. If fuse is blown, go to next step. If fuse is okay, go to step 9).
  8. Locate and repair short to ground in ignition feed circuit for instrument panel cluster. After repairs, go to step 17).
  9. Disconnect instrument panel cluster. Turn ignition on. Check voltage between ground and ignition feed circuit for instrument panel cluster. If battery voltage is present, go to next step. If battery voltage is not present, go to step 14).
  10. Check fuel level control circuit for an open or short to ground. Repair as necessary. After repairs, go to step 17). If circuit is okay, go to next step.
  11. Check fuel level control circuit and ignition feed circuit for poor connection at instrument panel cluster or at PCM. Repair as necessary. After repairs, go to step 17). If circuit is okay, go to step 15).
  12. Turn ignition off. Reconnect PCM connector. Disconnect instrument cluster connector. Turn ignition on. Using a test light, connect test light between fuel level output circuit and ignition feed circuit at instrument cluster connector. Using scan tool in OUTPUT TEST function, cycle affected light circuit on and off. If test light flashes on and off, see DIAGNOSTIC AIDS. If test light does not flash on and off, go to next step.
  13. Check fuel level output control circuit for poor connection at PCM. Repair as necessary. After repairs, go to step 17). If connection is okay, go to step 16).
  14. Locate and repair open in ignition feed circuit to instrument cluster indicator lights. After repairs, go to step 17).
  15. Replace instrument panel cluster. After replacing instrument cluster, go to step 17).
  16. Replace PCM. Program replacement PCM using required equipment. After replacing PCM, go to next step.
  17. Operate affected light using scan tool's OUTPUT TEST function. If affected light illuminates, system is okay, If affected light does not illuminate, repeat step 3).
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