Mazda CX-9 Grand Touring 2007 Manual page 444

2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Is the resistance less than 5 ohms?
13 INSPECT INTERNAL
RESISTANCE OF HO2S HEATER
Measure the resistance between
the suspect HO2S terminal A and
C at component side.
Is the resistance between 3-30
ohms?
14 INSPECT HO2S HEATER CIRCUIT
FOR INTERNAL SHORT TO
SIGRTN OR GROUND
Measure the resistance between:
HO2S terminal A and D at
component side
HO2S terminal A at
component side and battery
negative terminal
Is the resistance more than 10
kilohms?
15 INSPECT HO2S
For DTC P0133 Inspect the front
HO2S(RH)
For DTC P0139 Inspect the rear
HO2S(RH)
For DTC P0153 Inspect the front
HO2S(LH)
For DTC P0159 Inspect the rear
HO2S(LH)
(see FRONT HEATED
OXYGEN SENSOR (HO2S)
INSPECTION [MZI-3.5]. )
(see REAR HEATED OXYGEN
SENSOR (HO2S)
INSPECTION [MZI-3.5]. )
Is there any malfunction?
16 INSPECT FOR CORRECT PCM
OPERATION
2007 Mazda CX-9 Grand Touring
Yes
No
Yes
No
Yes
No
Yes
Go to the next step.
Install a new HO2S. Then go to Step 17.
Go to the next step.
Replace the HO2S.
(see FRONT HEATED OXYGEN
SENSOR (HO2S)
REMOVAL/INSTALLATION [MZI-
3.5]. )
(see REAR HEATED OXYGEN
SENSOR (HO2S)
REMOVAL/INSTALLATION [MZI-
3.5]. )
Then go to Step 17.
Replace the HO2S.
(see FRONT HEATED OXYGEN
SENSOR (HO2S)
REMOVAL/INSTALLATION [MZI-
3.5]. )
(see REAR HEATED OXYGEN
SENSOR (HO2S)
REMOVAL/INSTALLATION [MZI-
3.5]. )
Then go to Step 17.
Go to the next step.
Go to the next step.