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Home >> Suzuki >> 2005 >> XL-7 EX, RWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> H27 Engine >> Diagnostic Information and Procedures >> DTC P0103: Mass Air Flow Circuit High Input >> DTC Troubleshooting
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DTC Troubleshooting

DTC TROUBLESHOOTING CHART

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 MAF sensor check 
  1. Connect scan tool to DLC with ignition switch turned OFF.
  2. Start engine and check MAF value displayed on scan tool. Refer to "SCAN TOOL DATA  " for normal value.

Is normal value indicated? 

 Intermittent trouble. Check for intermittent referring to "INTERMITTENT AND POOR CONNECTION INSPECTION ". Go to Step 3.
3 MAF sensor output voltage check 
  1. Remove ECM cover.
  2. With ignition switch turned ON leaving engine stopped, measure voltage between "E61-27" and "E61-1" terminals of ECM connector.

Is voltage 1.0 - 1.6 V? 

 Go to Step 4. "PPL/WHT" circuit shorted to power supply line or open in "GRY/ YEL" circuit. If OK, substitute a known-good MAF sensor and recheck.
4 MAF sensor performance check 
  1. Start engine and measure voltage between "E61-27" and "E61-1" terminals of ECM connector.

Does voltage rise within 5 V range when engine speed is increased? 

 Substitute a known-good ECM and recheck. Substitute a known-good MAF sensor and recheck.
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