DTC P0107: Manifold Absolute Pressure (Map) Sensor Circuit Low Input

NOTE: If DTC P0107, P0122, and/or P0450 are set together, check for an open circuit to PCM harness connector "B" terminal No. 1 (Pink/Green wire on Esteem, or Light Green wire on Swift).

Connect scan tool to Data Link Connector (DLC). Turn ignition on. Select MAP sensor parameter. If display reads 5 kPa or less, go to next step. If display reading is more than 5 kPa, check for an intermittent problem. Go to TROUBLE SHOOTING - NO CODES article.
Turn ignition off. Disconnect MAP sensor harness connector. Turn ignition on. Using DVOM, measure voltage between ground and MAP sensor harness connector (Pink/Green wire on Esteem, or Light Green wire on Swift). Record reading. Measure voltage between ground and MAP sensor harness connector (Green wire on Esteem, or Orange/Green wire on Swift). If reading is 4-6 volts on both circuits, go to next step. If both readings are not 4-6 volts, check Pink/Green wire (Esteem) or Light Green wire (Swift) for an open or short to ground, or Green wire (Esteem) or Orange/Green wire (Swift) for short to ground. Check for poor connection at PCM harness connector "B". Repair as necessary. If connections are okay, replace PCM.
Turn ignition off. Disconnect vacuum hose from MAP sensor. Remove MAP sensor. Connect three 1.5 volt batteries in series. Connect positive terminal of batteries to VOLTAGE IN terminal at MAP sensor. Connect negative terminal of batteries to GROUND terminal at MAP sensor. See Fig 1 .

Fig 1: Testing MAP & FTP Sensors
Courtesy of SUZUKI OF AMERICA CORP.
Test map sensor operation. Go to MANIFOLD ABSOLUTE PRESSURE (MAP) SENSOR - ESTEEM & SWIFT under ENGINE SENSORS & SWITCHES in SYSTEM & COMPONENT TESTING article. Replace map sensor as necessary. If map sensor tests as specified, replace PCM.