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Test FC-31A - EGR System Failure (DTC 32)

NOTE: For connector terminal identification, see CONNECTOR IDENTIFICATION . For appropriate wiring diagram, see WIRING DIAGRAMS  at end of article.
  1. Start engine. Allow engine to idle for 2 minutes. Disconnect vacuum supply hose to EGR solenoid. Connect a vacuum gauge to disconnected hose. If vacuum gauge does not read 10 in. Hg, repair vacuum supply to EGR solenoid. Perform TEST VER-2.
  2. If vacuum gauge reads 10 in. Hg, reconnect vacuum hose to EGR solenoid. Disconnect vacuum hose from EGR valve. Connect a vacuum gauge to disconnected hose.
  3. While observing vacuum gauge, momentarily increase engine speed above 2000 RPM. If vacuum gauge reads 5 in. Hg, go to next step. If vacuum gauge does not read 5 in. Hg, replace EGR valve assembly. Perform TEST VER-2.
  4. Remove vacuum gauge from vacuum hose. Connect a vacuum pump to EGR valve nipple. Start engine and let idle. Slowly apply vacuum to EGR valve while observing engine idle. If engine idles rough or stalls as vacuum is applied, go to step 6).
  5. If engine does not idle rough or stall as vacuum is applied, remove EGR valve and inspect manifold and tube for restrictions. Repair as required. Perform TEST VER-2. If no restrictions were found, replace EGR valve. Perform TEST VER-2.
  6. If engine idled rough or stalled when vacuum was applied to EGR valve in step 4), turn ignition off. Apply vacuum to EGR valve nipple. Observe vacuum gauge. If vacuum does not hold for at least 10 seconds, replace EGR valve assembly. Perform TEST VER-2. If vacuum holds for at least 10 seconds, go to next step.
  7. At this time, the condition required to set fault is not present. EGR SYSTEM FAILURE fault occurs when Powertrain Control Module (PCM) performs a test of the EGR system and monitors the oxygen sensor signal for a change. Possible causes are: EGR valve not opening, EGR transfer tube blocked, or EGR passages in manifold blocked.
  8. Inspect hoses and connectors. Repair as required. Perform TEST VER-2. If hoses and connectors are okay, see INACTIVE FAULT CONDITION . Perform TEST VER-2.
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