P0052

O : DTC P0051, P0052. LEFT-HAND BANK HO2S HEATER

O1 : CHECK THE POWER SUPPLY CIRCUIT TO THE LEFT-HAND BANK HO2S HEATER

1. Turn the ignition switch to the ON position.
2. Measure the voltage between the HO2S electrical connector EN32 pin 2 (WR) and GROUND.

Is the voltage less than 10 volts?
Yes
Goto O4

No
Goto O2

O2 : CHECK THE GROUND CIRCUIT TO THE LEFT-HAND BANK HO2S HEATER

1. Turn the ignition switch to the OFF position.
2. Disconnect the PCM electrical connector EN16.
3. Measure the resistance between the HO2S electrical connector EN32 pin 1 (GO) and the PCM electrical connector EN16 pins 55 and 56 (GO).

Is the resistance of each wire less than 5 ohms?
Yes
Goto O3

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

O3 : CHECK THE LEFT-HAND BANK HO2S CIRCUIT FOR SHORT TO GROUND

1. Measure the resistance between the HO2S electrical connector EN32 pin 1 (GO) and GROUND.

Is the resistance less than 10,000 ohms?
Yes
REPAIR the short to ground. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
INSTALL a new left-hand bank HO2S. CLEAR DTCs. TEST the system for normal operation. If the DTC is repeated, INSTALL a new PCM. For additional information, Before replacing a PCM, contact Dealer technical support.

O4 : CHECK FUSE 42 OF THE ENGINE COMPARTMENT FUSE BOX

1. Check the fuse.

Is the fuse OK?
Yes
Goto O6

No
Goto O5

O5 : CHECK FUSE 42 OF THE ENGINE COMPARTMENT FUSE BOX FOR A SHORT TO GROUND

1. Measure the resistance between electrical connector JB34 pin 105 of the engine compartment fuse box and GROUND

Is the resistance less than 10,000 ohms?
Yes
REPAIR short to ground between the engine compartment fuse box and the left-hand bank HO2S. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
INSTALL a new fuse. Check the circuit for cause of fuse failure. CLEAR the DTC. TEST the system for normal operation.

O6 : CHECK THE POWER SUPPLY TO FUSE 42 IN THE ENGINE COMPARTMENT FUSE BOX

1. Measure the voltage between fuse 42, electrical connector JB34 pin 105 and GROUND.

Is the voltage less than 10 volts?
Yes
REPAIR the circuit from the PCM control relay to the engine compartment fuse box. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.

No
REPAIR the circuit between the engine compartment fuse box and the HO2S. For additional information, refer to wiring diagrams. CLEAR the DTC. TEST the system for normal operation.