z
Turn the ignition switch off.
z
Disconnect the HO2S connector.
z
Disconnect the PCM connector.
z
Measure the resistance between
the following terminals:
{
HO2S terminal A (wiring
harness-side) and battery
negative terminal
{
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?
No
Repair or replace suspected part, Then go
to Step 17.
12
INSPECT HO2S HEATER CIRCUIT
FOR OPEN CIRCUIT IN WIRING
HARNESS
z
Measure the resistance:
{
For DTC P0133 measure
resistance between PCM
terminal 2J and front HO2S
(RH) terminal A
{
For DTC P0153 measure
resistance between PCM
terminal 2AS and rear
HO2S (RH) terminal A
{
For DTC P0139 measure
resistance between PCM
terminal 2E and front HO2S
(LH) terminal A
{
For DTC P0159 measure
resistance between PCM
terminal 2AO and rear
HO2S (LH) terminal A
Yes
Go to the next step.
No
Repair or replace suspected part, Then 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
Page 96
© 2005 Mitchell Repair Information Company, LLC.