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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 P0404 >> Conditions for Clearing the MIL/DTC
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Conditions for Clearing the MIL/DTC

DTC P0404

Step Action Values 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 Is DTC P0405 or P0406 also set? - Go to Diagnostic Trouble Code (DTC) List Go to Step 3 
3
  1. Turn ON the ignition, with the engine OFF.
  2. Command the EGR valve from 0 percent to 100 percent with a scan tool.
  3. Observe the EGR Position Variance parameter with a scan tool.
Is the percentage less than the specified value?		 15% Go to Step 4  Go to Step 5 
4
  1. Observe the Freeze Frame/Failure Records data for this DTC.
  2. Turn OFF the ignition for 30 seconds.
  3. 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 5  Go to Intermittent Conditions
5
  1. Turn OFF the ignition.
  2. Disconnect the exhaust gas recirculation (EGR) valve.
  3. Turn ON the ignition, with the engine OFF.
  4. Observe the EGR Position Sensor parameter with a scan tool.
Is the parameter less than the specified value?		 1% Go to Step 6  Go to Step 13 
6
IMPORTANT: Use the J 35616-200  Test Lamp Kit for this test. If the J 35616-200  is not available, use a test lamp that measures between 25-30 ohms.
Connect a test lamp between the 5-volt reference circuit and the low reference circuit of the EGR valve position sensor.Does the test lamp illuminate?		 - Go to Step 8  Go to Step 7 
7 Connect a test lamp between the 5-volt reference circuit of the EGR valve position sensor and a good ground.
Does the test lamp illuminate?		 - Go to Step 15  Go to Step 14 
8
  1. Connect a 3-ampere fused jumper wire between the 5-volt reference circuit and the signal circuit of the EGR valve position sensor.
  2. Observe the EGR Position Sensor parameter on the scan tool.
Is the parameter more than the specified value?		 99% Go to Step 9  Go to Step 16 
9 Connect a test lamp between the ignition 1 voltage circuit of the EGR valve and a good ground.
Does the test lamp illuminate?		 - Go to Step 10  Go to Step 20 
10
  1. Connect a test lamp from the ignition 1 voltage circuit to the control circuit of the EGR valve.
  2. Command the EGR valve to 100 percent.
Does the test lamp illuminate?		 - Go to Step 11  Go to Step 17 
11
  1. Turn OFF the ignition.
  2. Disconnect the fuse that supplies ignition 1 voltage to the EGR valve.
  3. Measure the resistance of the ignition 1 voltage circuit of the EGR valve from the fuse terminal to the harness connector terminal of the EGR valve.
Is the resistance less than the specified value?		 3 Ω Go to Step 12  Go to Step 20 
12
  1. Turn ON the ignition, with the engine OFF.
  2. Probe the control circuit of the EGR valve with a test lamp connected to battery positive voltage.
  3. Command the EGR valve to 100 percent.
  4. Measure the voltage from the probe of the test lamp to a good ground.
Is the voltage less than the specified value?		 0.5 V Go to Step 18  Go to Step 17 
13 Test the signal circuit of the EGR valve position sensor 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 23  Go to Step 19 
14 Test the 5-volt reference circuit of the EGR valve position sensor for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 23  Go to Step 19 
15 Test the low reference circuit of the EGR valve position sensor for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 23  Go to Step 19 
16 Test the signal circuit of the EGR valve position sensor for the following conditions:
  • An open
  • A short to ground
  • High resistance

Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 23  Go to Step 19 
17 Test the control circuit of the EGR valve for an open or high resistance. Refer to Circuit Testing and Wiring Repairs in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 23  Go to Step 19 
18 Test the EGR valve for the following:
Did you find and correct the condition?		 - Go to Step 23  Go to Step 21 
19 Test for an intermittent and for a poor connection at the engine control module (ECM). Refer to Testing for Intermittent Conditions and Poor Connections and Repairing Connector Terminals in Wiring Systems.
Did you find and correct the condition?		 - Go to Step 23  Go to Step 22 
20 Repair the ignition 1 voltage circuit of the EGR valve for one of the following conditions:
  • An open
  • A short to ground
  • High resistance

Refer to Wiring Repairs in Wiring Systems.
Did you complete the repair?		 - Go to Step 23  -
21 Replace the EGR valve. Refer to Exhaust Gas Recirculation (EGR) Valve Replacement .
Did you complete the replacement?		 - Go to Step 23  -
22 Replace the ECM. Refer to Engine Control Module (ECM) Replacement .
Did you complete the replacement?		 - Go to Step 23  -
23
  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 2  Go to Step 24 
24 Observe the Capture Info with a scan tool.
Are there any DTCs that have not been diagnosed?		 - Go to Diagnostic Trouble Code (DTC) List System OK
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