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Home >> Suzuki >> 2005 >> Swift + >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 1.6L (L91) - DTC P0201 To DTC P0455 >> Diagnosis >> DTC P0443 >> Test Description
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Test Description

The numbers below refer to the step numbers on the diagnostic table.

  1. 2:  This step tests if the concern is active. The EVAP purge valve is pulse width modulated (PWM). When the purge valve is commanded to 50 percent, you should hear or feel a clicking. The clicking should stop when the EVAP purge valve is commanded to 0 percent. The rate at which the valve cycles should increase as the commanded state is increased. The rate should decrease when the commanded state is decreased. Repeat the commands as necessary.
  2. 5:  This step tests if a ground is constantly being applied to the EVAP purge valve.
  3. 6:  This step verifies that the ECM is providing ground to the EVAP purge valve.
DTC P0443

Step Action Yes No
Schematic Reference:  Engine Controls Schematics 
Connector End View Reference:  Engine Controls Connector End Views 
1 Did you perform the Diagnostic System Check - Engine Controls? Go to Step 2  Go to Diagnostic System Check - Engine Controls
2 
  1. Turn ON the ignition, with the engine OFF.
  2. With a scan tool, command the EVAP purge valve to 50 percent and then to 0 percent.
Do you hear or feel a clicking from the EVAP purge valve when the valve is commanded to 50 percent?		 Go to Step 3  Go to Step 4 
3
  1. Observe the Freeze Frame/Failure Records for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?		 Go to Step 4  Go to Intermittent Conditions
4
  1. Turn OFF the ignition.
  2. Disconnect the EVAP purge valve harness connector.
  3. Turn ON the ignition, with the engine OFF.
  4. Probe the ignition 1 voltage circuit at the EVAP purge valve harness connector with a test lamp connected to a good ground.
Does the test lamp illuminate?		 Go to Step 5  Go to Step 11 
5 
  1. Connect a test lamp between the control circuit and the ignition 1 voltage circuit of the EVAP purge valve harness connector.
  2. With a scan tool, command the EVAP purge valve to 0 percent.
Is the test lamp Illuminated?		 Go to Step 8  Go to Step 6 
6  With a scan tool command the EVAP purge valve to 50 percent.
Does the test lamp illuminate when the EVAP purge valve is commanded to 50 percent?		 Go to Step 9  Go to Step 7 
7 Test the control circuit of the EVAP purge valve for an open or for a short to voltage. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 10 
8 Test the control circuit of the EVAP purge valve for a short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 13 
9 Inspect for poor connections at the EVAP purge valve. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 12 
10 Inspect for poor connections at the ECM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems.
Did you find and correct the condition?		 Go to Step 14  Go to Step 13 
11 Repair the ignition 1 voltage circuit of the EVAP purge valve. Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 Go to Step 14  -
12 Replace the EVAP purge valve.
Did you complete the replacement?		 Go to Step 14  -
13 Replace the control module. Refer to Engine Control Module (ECM) Replacement .
Did you complete the replacement?		 Go to Step 14  -
14
  1. Clear the DTCs with a scan tool.
  2. Turn OFF the ignition for 30 seconds.
  3. Start the engine.
  4. Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records.
Did the DTC fail this ignition?		 Go to Step 15  Go to Step 2 
15 With a scan tool, observe the stored information, Capture Info.
Does the scan tool display any DTCs that you have not diagnosed?		 Go to Diagnostic Trouble Code (DTC) List System OK
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