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Home >> Suzuki >> 2006 >> Verona Luxury >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System - DTC P0030 Through P0175 >> DTC P0175: Fuel Trim System Rich Bank 2 >> DTC Troubleshooting
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DTC Troubleshooting

DTC 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 the scan tool to the Data Link Connector (DLC).
  2. Turn the ignition ON.

Are any component related Diagnostic Trouble Codes (DTCs) set?		 - Go to applicable DTC Table . Go to Step 3.
3 With the engine running, operate the vehicle until the LOOP STATUS indicates closed.
Is the Long Term Fuel Trim value above the specified value?		 -32% Go to Step 4. Go to Step 5.
4
  1. Turn the ignition switch to ON, with the engine OFF.
  2. Review the Freeze Frame data and note the parameters.
  3. Operate the vehicle within the Freeze Frame conditions and Conditions for Setting The DTC as noted.

Does the Long Term Fuel Trim value above the specified value while operating under the specified conditions?		 -32% Go to Step 15. Go to Step 5.
5 Visually/Physically check the air cleaner filter for excessive dirt or being plugged and repair as needed.
Is the repair complete?		 - Go to Step 15. Go to Step 6.
6 Visually/Physically check the air intake system for collapsed or restricted and repair as needed.
Is the repair complete?		 - Go to Step 15. Go to Step 7.
7 Inspect the throttle body inlet for damaged or foreign objects which may partially block the airflow and repair as needed.
Is the repair complete?		 - Go to Step 15. Go to Step 8.
8
  1. Turn the ignition OFF.
  2. Inspect the throttle bore and throttle plate for choking and foreign objects and repair as needed.

Is the repair complete?		 - Go to Step 15. Go to Step 9.
9
  1. Turn the ignition OFF.
  2. Disconnect the Manifold Absolute Pressure (MAP) sensor electrical connector.
  3. Start the engine.
  4. Operate the vehicle in Closed Loop while monitoring the Long Term Fuel Trim value.

Does the Long Term Fuel Trim value increase above the specified value?		 -32% Go to Step 14. Go to Step 10.
10
  1. Perform the FUEL SYSTEM DIAGNOSIS .
  2. If the table isolate a problem, repair as needed.

Is the repair complete?		 - Go to Step 15. Go to Step 11.
11
  1. Perform the EVAP CONTROL SYSTEM DIAGNOSIS .
  2. If the table isolate a problem, repair as needed.

Is the repair complete?		 - Go to Step 15. Go to Step 12.
12
  1. Perform the FUEL INJECTOR BALANCE TEST .
  2. If the table isolate a problem, repair as needed.

Is the repair complete?		 - Go to Step 15. Go to Step 13.
13
  1. Remove the Oxygen Sensor (O2S).
  2. Visually/Physically inspect the O2S for silicone contamination.
    3. NOTE: this will be indicated by a powdery white deposit on the portion of the O2S exposed to the exhaust stream.
  4. If contamination is present on the O2S, find the source and repair as needed.

Is the repair complete?		 - Go to Step 15. Go to Diagnostic Aids .
14
  1. Turn the ignition OFF.
  2. Replace the MAP sensor.

Is the repair complete?		 - Go to Step 15. -
15
  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 16. Go to Step 2.
16 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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