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Chart A-1 (Brougham, Caprice, CAMARO, Corvette, Firebird & ROADMASTER W/5.7L)

  1. If engine starts, go to step 3). If engine does not start, check for blown fuses in PCM ignition and PCM battery feed circuits. Check and repair circuits if blown fuses are present.
  2. If fuses are okay, turn ignition off. Disconnect PCM connector and turn ignition on. Check for battery and ignition voltage at appropriate PCM connector terminals. If voltage is not present, repair open circuit. If voltage is present, check for faulty PCM grounds, faulty connections at PCM or faulty PCM.
  3. If engine started in step 1), connect Scan tester to ALDL connector. If Scan tester can display serial data, go to CODE DTC-11. If Scan tester cannot display serial data, turn ignition off.
  4. Disconnect PCM connector and turn ignition on. Check for ignition voltage at PCM connector terminal D3 (Pink or Pink/Black wires). If voltage is not present, repair open ignition circuit. If voltage is present, check for faulty PCM grounds, faulty connections at PCM or faulty PCM.
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