PURGE CONTROL SYSTEM INSPECTION
If simulation function of the M-MDS is used:
1. Start the engine.
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-3.7]
.)
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.
2008 Mazda CX-9 Grand Touring
2008 ENGINE Symptom Troubleshooting (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:10:06 AM
Page 109
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