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Check reference values between ECM terminals and ground under the following conditions: ECM TERMINAL NO. ITEM CONDITION DATA (DC VOLTAGE) 17 Sensor (GND) Engine: Running - Approximately 0 V 33 Regulated sensor supply 1 - Approximately 5 V 37 Manifold Absolute Pressure (MAP) sensor • Engine running: • Press accelerator Approximately 1.3 V • Press accelerator Up to Approximately 4 V (instantaneous) 73 Sensor power supply 1 - Approximately 5 V On Board Diagnostic Logic DTC NO. DTC DEFINITION DTC DETECTION CONDITION DTC SET CONDITION POSSIBLE CAUSE P0105 (1.6L) Manifold absolute pressure/barometric pressure circuit • Ignition switch:ON • Engine: Running Signal output is out • MAP sensor • Harness or • ECM P0106 (1.6L) Manifold absolute pressure or barometric pressure range/performance • MAP sensor • Harness or • ECM DTC Confirmation Procedure: Before performing the following procedure, confirm that battery voltage is more than 12 V. • Turn ignition switch off. • Connect the X-431 scan tool to the Data Link Connector (DLC) - use the most current software available. • Turn ignition switch on. • With the scan tool, record and erase stored DTCs in the ECM. • Start engine and warm it to normal operating temperature, then select view DTC and data stream. • If the DTC is detected, the DTC condition is current. Go to Diagnostic Procedure - Step 1. • If the DTC is not detected, the DTC condition is intermittent (See Diagnostic Help and Intermittent DTC Trou- bleshooting in Section 03 Electronic Engine Controls for more information. Diagnostic Procedure 1. CHECK GROUND CONNECTIONS • Turn ignition switch off. • Loosen and retighten ground screws on the body (See Ground Inspection in Section 03 Electronic Engine Con- trols). • Inspect ground connections E-207 and E-208 mounting position (See Vehicle Wiring Harness Layout - Engine Room Harness (With 1.6L/1.8L Engine) in Section 16 Wiring). Is ground connections OK? Yes >> Go to the next step. No >> Repair or replace ground connections. DIAGNOSIS & TESTING 03
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