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Home >> Kia >> 2017 >> Niro EX >> Repair and Diagnosis >> Engine Performance >> System >> Engine Control System Diagnosis (5 Of 6) >> DTC P2240-00: O2 Sensor Positive Current Control Circuit/Open (Bank 2 / Sensor 1) >> Wiring Inspection >> Circuit Inspection
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Circuit Inspection

Fig 1: ECM System Circuit
G12330430Courtesy of KIA MOTORS AMERICA, INC.
INSPECTION PART - O2 SENSOR (UP) AND ECM CONNECTORS INSPECTION

Inspection Condition (+) Probe (-) Probe Specification
Connector Terminal Connector Terminal
  1. Ignition "OFF".
  2. Disconnect the battery (-) cable.
  3. Disconnect the electrical connector(s) from the component and ECM.
 O2 sensor (up) connector (Virtual Ground) Chassis ground - ∞ (infinite) Ω
O2 sensor (UP) connector 2 (Nernst Voltage) Chassis ground - ∞ (infinite) Ω
O2 sensor (UP) connector 3 (Current Pump) Chassis ground - ∞ (infinite) Ω
O2 sensor (UP) connector 4 (Current Adjust) Chassis ground - ∞ (infinite) Ω
O2 sensor (UP) connector 1 (Virtual Ground) ECM connector 43 (Virtual Ground) Approx. below 1Ω
O2 sensor (UP) connector 2 (Nernst Voltage) ECM connector 58 (Nernst Voltage) Approx. below 1Ω
O2 sensor (UP) connector 3 (Current Pump) ECM connector 59 (Current Pump) Approx. below 1Ω
O2 sensor (UP) connector 4 (Current Adjust) ECM connector 44 (Current Adjust) Approx. below 1Ω
  1. Disconnect the electrical connector(s) from the concerned component.
  2. Ignition "ON".
 O2 sensor (up) connector 1 (Virtual Ground) Chassis ground - Approx. 0V
O2 sensor (up) connector 2 (Nernst Voltage) Chassis ground - Approx. 0V
O2 sensor (UP) connector 3 (Current Pump) Chassis ground - Approx. 0V
O2 sensor (UP) connector 4 (Current Adjust) Chassis ground - Approx. 0V
Good 
No Good 
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