P0140

J : DTC P0037, P0038, P0137, P0138, P0140. RIGHT-HAND BANK CATALYST MONITOR

J1 : CHECK THE POWER SUPPLY CIRCUIT TO THE RIGHT-HAND BANK CATALYST MONITOR

HEATER
1. Turn the ignition switch to the OFF position.
2. Disconnect the catalyst monitor sensor electrical connector EN14.
3. Turn the ignition switch to the ON position.
4. Measure the voltage between the catalyst monitor sensor electrical connector EN14, pin 2 (WG) and GROUND.

Is the voltage less than 10 volts?
Yes
Goto J6

No
Goto J2

J2 : CHECK CONTINUITY OF THE RIGHT-HAND BANK CATALYST MONITOR SENSOR GROUND CIRCUIT

1. Turn the ignition switch to the OFF position.
2. Disconnect the PCM electrical connector EN16.
3. Measure the resistance between the catalyst monitor sensor electrical connector EN14, pin 3 (W) and the PCM electrical connector EN16, pin 130.

Is the resistance less than 5 ohms?
Yes
Goto J3

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

J3 : CHECK CONTINUITY OF THE POWER SUPPLY WIRE TO THE RIGHT-HAND BANK CATALYST MONITOR SENSOR

1. Measure the resistance between the RH bank catalyst monitor sensor electrical connector EN14, pin 4 (N) and the PCM electrical connector EN16, pin 128 (N).

Is the resistance less than 5 ohms?
Yes
Goto J4

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

J4 : CHECK THE RIGHT-HAND BANK CATALYST MONITOR SENSOR POWER SUPPLY WIRE FOR A SHORT TO GROUND

1. Measure the resistance between the catalyst monitor sensor electrical connector EN14, pin 4 (N) 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
Goto J5

J5 : CHECK THE RIGHT-HAND BANK CATALYST MONITOR SENSOR POWER SUPPLY WIRE FOR A SHORT TO BATTERY

1. Measure the voltage between the catalyst monitor sensor electrical connector EN14, pin 4 (N) and GROUND.

Is the voltage greater than 1 volt?
Yes
REPAIR the short to battery. For additional information, refer to the wiring diagrams. CLEAR the DTCs. TEST the system for normal operation.

No
INSTALL a new RH bank catalyst monitor sensor. CLEAR the 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.

J6 : CHECK THE RIGHT-HAND BANK CATALYST MONITOR SENSOR POWER SUPPLY CIRCUIT

1. Measure the voltage between the catalyst monitor sensor electrical connector EN14 pin 2 (WG) and GROUND.

Is the voltage less than 10 volts?
Yes
Goto J8

No
Goto J7

J7 : CHECK CONTINUITY OF THE RIGHT-HAND BANK CATALYST MONITOR SENSOR HEATER GROUND CIRCUIT

1. Turn the ignition switch to the OFF position.
2. Disconnect the PCM electrical connector EN16.
3. Measure the resistance between the catalyst monitor sensor electrical connector EN14, pin 1 (U) and the PCM electrical connector EN16, pin 92 (U).

Is the resistance less than 5 ohms?
Yes
INSTALL a new PCM. For additional information, Before replacing a PCM, contact Dealer technical support.

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

J8 : CHECK FUSE 38 OF THE ENGINE COMPARTMENT FUSE BOX

1. Check the fuse.

Is the fuse OK?
Yes
Goto J10

No
Goto J9

J9 : CHECK FUSE 38 OF THE ENGINE COMPARTMENT FUSE BOX FOR A SHORT TO GROUND

1. Measure the resistance between electrical connector JB34, pin 97 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 right-hand bank HO2S. 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.

J10 : CHECK THE POWER SUPPLY TO FUSE 38 IN THE ENGINE COMPARTMENT FUSE BOX

1. Measure the voltage between fuse 38 electrical connector JB34 pin 97 and GROUND.

Is the voltage less than 10 volts?
Yes
REPAIR the circuit from the PCM control relay to the engine compartment fuse box. 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.