harness-side) and PCM
terminal 2BG (wiring
harness-side)
{
PCM terminal 1BJ (wiring
harness-side) and PCM
terminal 2U (wiring
harness-side)
{
PCM terminal 1BJ (wiring
harness-side) and PCM
terminal 2BC (wiring
harness-side)
z
Is the resistance more than 10
kilohms?
No
Go to Step 10.
7
INSPECT FOR SOURCE OF
POTENTIAL HO2S
CONTAMINATION
z
Investigate the following items as
potential sources of HO2S
contamination:
{
Use of unapproved silicon
sealers
{
Fuel contaminated by
silicon additives
{
Excessive oil consumption
{
Glycol leaking internally in
the engine
{
Lead-contaminated fuel
{
Short drive cycles in cold
weather
{
Use of unapproved cleaning
agents
z
Is a concern present?
Yes
Repair the source of the contamination.
Change the engine oil and oil filter. Then
go to Step 17.
No
Go to the next step.
8
VISUALLY INSPECT HO2S
WIRING HARNESS
z
Connect the PCM connector.
z
Visually inspect the HO2S wiring
harness for exposed wiring water
contamination, corrosion, and
proper assembly.
z
Is a concern present?
Yes
Repair if necessary. Then go to the next
step.
No
Go to the next step.
9
INSPECT HO2S AND SIGRTN
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
Page 94
© 2005 Mitchell Repair Information Company, LLC.