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Home >> Suzuki >> 2006 >> Grand Vitara Premium, RWD, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine General Information And Diagnosis) >> Diagnostic Information And Procedures >> DTC P2252/P2253: O2 Sensor Negative Current Control Circuit Low/High (Sensor-1, Bank-1) >> DTC Troubleshooting
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DTC Troubleshooting

WARNING: This page is about a different car, the 2007 Suzuki Grand Vitara. However, it is still accessible from the selected car via links, so may be relevant.
NOTE: Before this trouble shooting is performed, read the precautions for DTC troubleshooting by referring to PRECAUTIONS FOR DTC TROUBLESHOOTING .
TROUBLESHOOTING TABLE

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2  A/F sensor signal check 
  1. Connect scan tool with ignition switch turned OFF.
  2. Warm up engine to normal operating temperature and keep it at 2000 r/min. for 60 sec.
  3. Repeat racing engine (Repeat depressing accelerator pedal 5 to 6 times continuously to enrich A/F mixture and take foot off from pedal to enlean it).
  4. Check for A/F sensor (bank-1) output current displayed on scan tool.

Does A/F sensor output current between -0.2 mA and 0.2 mA? 		 Intermittent trouble. Check for intermittent by referring to Intermittent and Poor Connection Inspection. Go to Step 3.
3  A/F sensor circuit check 
  1. Disconnect connector from A/F sensor (bank-1) with ignition switch turned OFF.
  2. Check for proper terminal connection to A/F sensor (bank-1) connector and ECM connector.
  3. If connections are OK, check that A/F sensor (bank-1) circuit is as follows.
    • Wiring harness resistance of each "Signal (+) circuit of A/F sensor (bank-1)", "Signal (-) circuit of A/F sensor (bank-1)" is less than 1 Ω.
    • Insulation resistance between "Signal (-) circuit of A/F sensor (bank-1)" and vehicle body ground is infinity.
    • Insulation resistance between "Signal (+) circuit of A/F sensor (bank-1)" and "Signal (-) circuit of A/F sensor (bank-1)" is infinity.
    • Insulation resistance of wire harness is infinity between "Signal (+) circuit of A/F sensor (bank-1)" terminal and each other terminal at A/F sensor (bank-1) connector.
    • Insulation resistance of wire harness is infinity between "Signal (-) circuit of A/F sensor (bank-1)" terminal and each other terminal at A/F sensor (bank-1) connector.
    • Circuit voltage between "Signal (-) circuit of A/F sensor (bank-1)" and vehicle body ground is 0 V with ignition switch tuned ON.

Are they in good condition? 		 Go to Step 4. Repair or replace defective wiring harness.
4  A/F sensor heater check 
  1. Check A/F sensor (bank-1) by referring to AIR FUEL RATIO (A/F) SENSOR ON-VEHICLE INSPECTION .

Is A/F sensor in good condition? 		 Substitute a known good ECM and recheck. If ECM OK, replace A/F sensor (bank-1). Replace A/F sensor (bank-1).
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