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Home >> Suzuki >> 2006 >> Forenza Base, 4D Wagon, Standard >> Repair and Diagnosis (Single Page) >> Engine Performance >> Engine Control Systems >> Engine Performance - DTC P0401 - P0507 >> DTC P042E: Exhaust Gas Recirculation (EGR) Closed Position Performance >> Troubleshooting
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DTC P042E: Exhaust Gas Recirculation (EGR) Closed Position Performance: Troubleshooting

TROUBLESHOOTING CHART

Step Action Value(s) Yes No
1 Perform an On-Board Diagnostic (OBD II) System Check.
Is the system check complete?		 - Go to Step 2 Go to On-Board Diagnostic (OBD II) System Check
2
  1. Install a scan tool to the Data Link Connector (DLC).
  2. Turn the ignition ON.
  3. Command the Exhaust Gas Recirculation (EGR) valve to the specific values.

Does the Actual EGR Position follow the Desired EGR Position?		 25%, 50%, 75%, 100% Go to Step 13 Go to Step 3
3
  1. Turn the ignition OFF.
  2. Disconnect the EGR valve.

Is the Actual EGR Position near the specified value?		 100% Go to Step 4 Go to Step 5
4 Check the signal circuit terminal 3 at the EGR wiring harness connector for a short to voltage and repair as necessary.
Is a repair necessary?		 - Go to Step 13 Go to Step 6
5 With a Digital Voltmeter (DVM) connected to ground, probe the 5 volt reference circuit terminal 4 of the EGR valve wiring harness connector.
Does the DVM read near the specified value?		 5 V Go to Step 7 Go to Step 8
6
  1. Turn the ignition OFF.
  2. Replace the Engine Control Module (ECM).

Is the repair complete?		 - Go to Step 13 -
7
  1. Connect a test light to ground.
  2. Probe the EGR control circuit at the EGR valve harness connector.

Does the test light illuminate?		 - Go to Step 9 Go to Step 10
8 Check the 5 volt reference circuit for a short to voltage and repair as necessary.
Is a repair necessary?		 - Go to Step 13 Go to Step 6
9 Check the control circuit for a short to voltage and repair as necessary.
Is the repair complete?		 - Go to Step 13 Go to Step 6
10 Check the EGR sensor ground circuit for an open or poor connection at the EGR valve electrical connector and repair as necessary.
Is a repair necessary?		 - Go to Step 13 Go to Step 12
11
  1. Turn the ignition OFF.
  2. Replace the EGR valve.

Is the repair complete?		 - Go to Step 13 -
12 Check the ECM connector for a poor connection and repair as needed.
Is the repair complete?		 - Go to Step 13 Go to Step 11
13
  1. Using the scan tool, clear the Diagnostic Trouble Codes (DTCs).
  2. Start the engine and idle at normal operating temperature.
  3. Operate the vehicle within the Conditions for setting this DTC as specified in the supporting text.

Does the scan tool indicate that this diagnostic has run and passed?		 - Go to Step 14 Go to Step 2
14 Check if any additional DTCs are set.
Are any DTCs displayed that have not been diagnosed?		 - Go to applicable DTC table System OK
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