LEMON Manuals: Even more car manuals for everyone
Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 35 (Engine Controls - Tests W/Codes - 3.9L) >> Self-Diagnostic Tests >> Test TC-33A - EGR Solenoid Circuit (DTC 32)

Test TC-33A - EGR Solenoid Circuit (DTC 32)

WARNING: This page is about a different car, the 1995 Dodge Ram Wagon, 1995 Dodge Ram Van, 1995 Dodge Pickup, 1995 Dodge Dakota, and 1995 Dodge Cab & Chassis. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: For circuit and connector terminal identification, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS  section at the end of this article.
  1. Using scan tool, erase trouble codes and actuate EGR solenoid. Using scan tool, read trouble codes. If scan tool does not display EGR SOLENOID CIRCUIT, condition required to set trouble code is not present at this time. Go to next step. If scan tool displays EGR SOLENOID CIRCUIT, go to step 5).
  2. EGR SOLENOID CIRCUIT trouble code sets if EGR solenoid is not in its proper state when monitored by Powertrain Control Module (PCM). Possible causes are: open or shorted EGR solenoid, open EGR solenoid power supply circuit (Dark Blue wire on AB and AN bodies; Light Green/Black wire on BR body), open or shorted EGR solenoid ground circuit (Gray/Yellow wire) or failed PCM. Go to next step.
  3. Inspect all related wiring and connectors. Repair as necessary. Perform TEST VER-2. If no problems are found with wiring and connectors, go to next step.
  4. Using scan tool, read trouble codes. EGR actuation test should still be running. Wiggle wiring harness from EGR solenoid to PCM. If EGR SOLENOID CIRCUIT trouble code returns, repair wiring harness as necessary. Perform TEST VER-2. If EGR SOLENOID CIRCUIT trouble code does not return, see INACTIVE TROUBLE CODE CONDITION . Perform TEST VER-2.
  5. Turn ignition off. Disconnect EGR solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on EGR solenoid connector, fused ignition switch output circuit (Dark Blue wire on AB and AN bodies; Light Green/Black wire on BR body). If voltage is less than 10 volts, repair open Dark Blue wire, Light Green/Black wire or Light Blue wire. Perform TEST VER-2.
  6. If voltage is more than 10 volts, turn ignition off. Disconnect Powertrain Control Module (PCM) connector. Using external ohmmeter, check resistance of ground circuit (Gray/Yellow wire) between EGR solenoid connector and PCM connector terminal No. 35. If resistance is more than 5 ohms, repair open Gray/Yellow wire. Perform TEST VER-2.
  7. If resistance is less than 5 ohms, use scan tool in ohmmeter mode to check resistance of PCM connector terminal No. 35 (Gray/Yellow wire). If resistance is less than 5 ohms, repair short to ground in Gray/Yellow wire. Perform TEST VER-2.
  8. If resistance is more than 5 ohms, reconnect EGR solenoid connector. Turn ignition on. Using scan tool in voltmeter mode, check voltage on PCM connector terminal No. 35 (Gray/Yellow wire). If voltage is less than 10 volts, replace EGR solenoid. Perform TEST VER-2. If voltage is more than 10 volts, replace PCM. Perform TEST VER-2.
scientia non olet · About LEMON Manuals