2
z
Inspect the spark plugs for damage,
wear, and proper plug gap.
z
Are the spark plugs normal?
Yes
Go to the next step.
No
Replace spark plugs, then go to the next
step.
3
z
Reconnect the spark plugs to the
ignition coil.
z
Ground the spark plugs to the
engine.
z
Is a strong blue spark visible at
each cylinder while cranking?
Yes
Ignition system is normal.
No
Some cylinders do not spark:
z
Go to the next step.
All cylinders do not spark:
z
Go to Step 5.
4
z
Inspect the following wiring
harnesses for open or short:
{
Ignition coil No.1 terminal
C-PCM terminal 2A
{
Ignition coil No.2 terminal
C-PCM terminal 2F
{
Ignition coil No.3 terminal
C-PCM terminal 2K
{
Ignition coil No.4 terminal
C-PCM terminal 2W
{
Ignition coil No.5 terminal
C-PCM terminal 2AA
{
Ignition coil No.6 terminal
C-PCM terminal 2AE
z
Are the wiring harnesses normal?
Yes
Inspect and replace the ignition coil.
(see
IGNITION COIL INSPECTION
[MZI-3.5]
.)
No
Repair or replace the malfunctioning
part, then go to Step 1.
5
z
Measure the voltage at terminal A
in each ignition coils.
z
Is the voltage
B+
?
Yes
Go to the next step.
No
Inspect power supply circuit of ignition
coils.
6
Verify continuity between each ignition
coils terminal B and battery negative post.
Is there any continuity?
Yes
Go to the next step.
No
Inspect GND circuit of ignition coils.
7
z
Does the PCM connector or
ignition coil connectors have poor
connection?
Yes
Repair or replace the connector, then go
to Step 1.
No
Go to the next step.
8
z
Are the following parts normal?
{
CKP sensor and crankshaft
pulley
Yes
Inspect for open or short circuit in
wiring harness and connector of CKP
sensor.
No
Repair or replace the malfunctioning
part, then go to Step 1.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE Symptom Troubleshooting (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:27:38 AM
Page 107
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