9
z
Measure the resistance between the
following terminals:
{
PCM terminal 2Y (wiring
harness-side) and front HO2S
(RH) terminal B (wiring harness-
side)
{
PCM terminal 2BG (wiring
harness-side) and rear HO2S
(RH) terminal B (wiring harness-
side)
{
PCM terminal 2U (wiring
harness-side) and front HO2S
(LH) terminal B (wiring harness-
side)
{
PCM terminal 2BC (wiring
harness-side) and rear HO2S
(LH) terminal B (wiring harness-
side)
{
PCM terminal 2AL (wiring
harness-side) and HO2S terminal
D (wiring harness-side)
z
Are the resistances less than 5 ohms?
are in the proper location.
No
Repair or replace suspected part, Then go to
Step 17.
10
INSPECT HO2S CONTROL CIRCUIT IN
WIRING HARNESS
z
Turn the ignition switch off.
z
Disconnect the HO2S connector.
z
Perform the KOEO self-test.
z
Measure the voltage between: HO2S
connector terminal C and D on the
wiring harness side.
z
Is the voltage more than 10 V?
Yes Go to the next step.
No
Repair or replace suspected part, Then go to the
next step.
INSPECT HO2S HEATER FOR SHORT
IN WIRING HARNESS
z
Turn the ignition switch off.
z
Disconnect the HO2S connector.
z
Disconnect the PCM connector.
z
Measure the resistance between the
following 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 93
© 2005 Mitchell Repair Information Company, LLC.
