proper assembly.
z
Is a concern present?
5
INSPECT POWER SUPPLY IN
WIRING HARNESS
z
Disconnect suspect HO2S
connector.
z
Turn the ignition switch to the ON
position (Engine off).
z
Measure the voltage between
suspect HO2S connector terminal
A and C, on the wiring harness
side.
z
Is the voltage more than 10 V?
Yes
Turn the ignition switch off. Go to the next
step.
No
Repair or replace suspected part, Go to
Step 12.
6
INSPECT HO2S HEATER FOR
SHORT TO GROUND
z
Disconnect the PCM connector.
z
Measure the resistance between
HO2S terminal A on the wiring
harness side and body ground.
z
Is the resistance more than 10
kilohms?
Yes
Go to the next step.
No
Repair or replace suspected part, Go to
Step 12.
7
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 12.
8
INSPECT HO2S HEATER CIRCUIT
FOR OPEN CIRCUIT IN WIRING
Yes
Go to the next step.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:30 AM
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