P1647

L : DTC P0051, P0052, P0151, P0152, P0153, P1647. BANK 2 HO2S.

L1 : CHECK THE CONSTANT CIRCUIT OF THE BANK 2 HO2S FOR OPEN CIRCUIT
1. Disconnect the bank 2 HO2S electrical connector PI12.
2. Disconnect the PCM electrical connector, PI01.
3. Measure the resistance between PI01, pin 108 (N) and PI12, pin 4 (N)

Is the resistance less than 5 ohms?

Yes
Goto L2

No
Repair the circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

L2 : CHECK THE CONSTANT CIRCUIT OF THE BANK 2 HO2S FOR SHORT TO GROUND
1. Measure the resistance between PI01, pin 108 (N) and GROUND.

Is the resistance less than 10,000 ohms?

Yes
Repair the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
Goto L3

L3 : CHECK THE CONSTANT CIRCUIT OF THE BANK 2 HO2S FOR SHORT TO BATTERY
1. Connect the PCM electrical connector PI01.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between PI12, pin 4 (N) and GROUND.

Is the voltage greater than 5 volts?

Yes
Repair the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
Goto L4

L4 : CHECK THE VARIABLE CIRCUIT OF THE BANK 2 HO2S FOR OPEN CIRCUIT
1. Disconnect the bank 1 HO2S electrical connector, PI12.
2. Disconnect the PCM electrical connector, PI01.
3. Measure the resistance between PI01, pin 107 (G) and PI12, pin 3 (G)

Is the resistance less than 5 ohms?

Yes
Goto L5

No
Repair the circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

L5 : CHECK THE VARIABLE CIRCUIT OF THE BANK 2 HO2S FOR SHORT TO GROUND
1. Measure the resistance between PI01, pin 107 (G) and GROUND.

Is the resistance less than 10,000 ohms?

Yes
Repair the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
Goto L6

L6 : CHECK THE VARIABLE CIRCUIT OF THE BANK 2 HO2S FOR SHORT TO BATTERY
1. Connect the PCM electrical connector PI01.
2. Turn the ignition switch to the ON position.
3. Measure the voltage between PI12, pin 3 (G) and GROUND.

Is the voltage greater than 1 volt?

Yes
Repair the short circuit. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
Install a new bank 2 HO2S. CLEAR the DTCs. TEST the system for normal operation. If the DTC is repeated, INSTALL a new PCM.