11
{
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
z
Is the resistance less than 5 ohms?
Yes Go to the next step.
No
Repair or replace suspected part, Then go to the
next step.
13
INSPECT INTERNAL RESISTANCE OF
HO2S HEATER
z
Measure the resistance between the
suspect HO2S terminal A and C at
component side.
z
Is the resistance between 3-30 ohms?
Yes Go to the next step.
No
Install a new HO2S. Then go to Step 17.
INSPECT HO2S HEATER CIRCUIT FOR
INTERNAL SHORT TO SIGRTN OR
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 94
© 2005 Mitchell Repair Information Company, LLC.
