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MULTIPORT FUEL INJECTION (MPI) DIAGNOSIS MULTIPORT FUEL INJECTION (MPI) 13A-192 DTC P0137: Heated Oxygen Sensor Circuit Low Voltage (bank 1, sensor 2). . CIRCUIT OPERATION • A voltage corresponding to the oxygen concen- tration in the exhaust gas is sent to the • Terminal No. 2 of the right bank heated oxygen sensor (rear) is grounded with ENGINE-ECU (ter- . TECHNICAL DESCRIPTION • The output signal of the right bank heated oxygen sensor (front) is compensated by the output sig- • The ENGINE-ECU checks for an open circuit in the right bank heated oxygen sensor (rear) output . DTC SET CONDITIONS Check Conditions • Battery voltage is between 10.7 and 16.1volts. • Engine speed is above 20 r/min. • Engine start achieved. Judgement Criteria • Signal check. • MIL is activated after 2 Drive cycles. • No limp home. . EOBD DRIVE CYCLE PATTERN Refer to Diagnostic Function − EOBD Drive Cycle − . . TROUBLESHOOTING HINTS (The most • Right bank heated oxygen sensor (rear) failed. • Short circuit to ground in right bank heated oxy- gen sensor (rear) output line. • Wiring harness or connector damage. • Refer to component locations GROUP- • Refer to configuration diagrams GROUP- • Refer to circuit diagrams GROUP- DIAGNOSIS Required Special Tools: • : Diagnostic Tool (MUT-III Sub Assembly) • MB991824: V.C.I. • MB991827: USB Cable • MB991910: Main Harness A AK303063 THROTTLE BODY RIGHT BANK HEATED OXYGEN SENSOR (REAR) CONNECTOR: B-08 B-08 (GR) AB 16DB400A COVER ENGINE CONTROL UNIT AIR CLEANER |