z
Is the resistance more than 10
kilohms?
5
INSPECT HO2S HEATER FOR
SHORT IN WIRING HARNESS
z
Measure the resistance between the
following terminals:
{
HO2S terminal A (wiring
harness-side) and HO2S
terminal C (wiring harness-
side)
{
HO2S terminal A (wiring
harness-side) and HO2S
terminal D (wiring harness-
side)
{
HO2S terminal A (wiring
harness-side) and HO2S
terminal B (wiring harness-
side)
z
Are the resistances more than 10
kilohms?
Yes Go to the next step.
No
Repair or replace suspected part, Go to Step 9
6
INSPECT HO2S HEATER CIRCUIT
FOR OPEN CIRCUIT IN WIRING
HARNESS
z
For DTC P0053 Measure resistance
between PCM terminal 2J and front
HO2S (RH) terminal A.
z
For DTC P0054 Measure resistance
between PCM terminal 2AS and rear
HO2S (RH) terminal A.
z
For DTC P0059 Measure resistance
between PCM terminal 2E and front
HO2S (LH) terminal A.
z
For DTC P0060 Measure resistance
between PCM terminal 2AO and
rear HO2S (LH) terminal A.
z
Is the resistance less than 5.0 ohms?
Yes Go to the next step.
No
Repair or replace suspected part, Go to Step 9.
7
INSPECT INTERNAL RESISTANCE
OF HO2S HEATER
z
Measure the resistance between the
suspect HO2S terminal A and C on
the component side.
Yes Go to the next step.
No
Replace the HO2S.
(See
FRONT HEATED OXYGEN SENSOR
(HO2S) REMOVAL/INSTALLATION [MZI-
3.7]
.)
(See
REAR HEATED OXYGEN SENSOR
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:34 AM
Page 47
© 2005 Mitchell Repair Information Company, LLC.
