Fig. 24: Front HO2S Outputs Voltage Graph
Courtesy of MAZDA MOTORS CORP.
z
If not within the specification, inspect the front HO2S for an open or short circuit. (See
FRONT
HEATED OXYGEN SENSOR (HO2S) VOLTAGE INSPECTION
.) Then if there is no
malfunction in the wiring harness, replace the front HO2S. (See
FRONT HEATED OXYGEN
SENSOR (HO2S) REMOVAL/INSTALLATION [MZI-3.5]
. --> Front Heated Oxygen Sensor
(HO2S) Voltage Inspection.) Then if there is no malfunction in the wiring harness, replace the front
HO2S. (See
FRONT HEATED OXYGEN SENSOR (HO2S) REMOVAL/INSTALLATION
[MZI-3.5]
.)
HO2S HEATER RESISTANCE INSPECTION
1. Disconnect the HO2S connector.
2. Measure the resistance between HO2S terminals C and A.
z
If it is not within the specification, replace the HO2S. (See
FRONT HEATED OXYGEN
SENSOR (HO2S) REMOVAL/INSTALLATION [MZI-3.5]
.)
z
If the monitor item status/specification (reference) is not within the specification, even though the
resistance is within the specification, perform the "Circuit Open/Short Inspection".
HO2S heater resistance
3-30 ohms
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Control System (MZI-3.5) - CX-9
Microsoft
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