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Vitara 1.6L & 2.0L

  1. Disconnect MAF sensor connector. Turn ignition on. Using a DVOM, measure voltage between MAF sensor connector Blue/Black wire and ground. If battery voltage is indicated, go to next step. If battery voltage is not indicated, repair open or short circuit in Blue/Black wire between MAF sensor and main relay.
  2. Turn ignition off and remove PCM cover. Reconnect MAF sensor. Turn ignition on and measure voltage (backprobe) at PCM connector terminal C51-3-10. Voltage reading should be 1.0-1.6 volts. Start engine. At idle, voltage should read between 1.7-2.0 volts. Voltage should stay below 5 volts but increase as engine speed is increased. If test results are not as specified, go to DTC P0101: MASS AIRFLOW (MAF) CIRCUIT PERFORMANCE PROBLEM under DIAGNOSTIC TESTS in SELF-DIAGNOSTICS - VITARA 1.6L & 2.0L article.
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