6
{
PCM terminal 1 BJ (wiring
harness-side) and PCM terminal
2BG (wiring harness-side)
{
PCM terminal 1 BJ (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.
INSPECT HO2S AND SIGRTN
CIRCUITS FOR OPEN CIRCUIT IN
WIRING HARNESS
NOTE:
z
Verify the wiring harness terminals
Yes Go to the next step.
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:35 AM
Page 92
© 2005 Mitchell Repair Information Company, LLC.
