z
Measure voltage between A/C
relay terminal A (wiring harness-
side) and body ground.
z
Is voltage
B+
?
6
INSPECT A/C RELAY CONTROL
CIRCUIT FOR SHORT TO POWER
SUPPLY
z
Turn the ignition switch to the ON
position (Engine off).
z
Remove the A/C relay.
z
Measure voltage between A/C
relay terminal E (wiring harness-
side) and body ground.
z
Is voltage
B+
?
Yes
Repair or replace suspected part, then go to
Step 12.
No
Go to the next step.
7
INSPECT A/C RELAY CONTROL
CIRCUIT FOR SHORT TO
GROUND
z
Install the A/C relay.
z
Turn the ignition switch off.
z
Inspect continuity between A/C
relay terminal E (wiring harness-
side) and body ground.
z
Is there continuity?
Yes
Repair or replace suspected part, then go to
Step 12.
No
Go to the next step.
8
INSPECT PCM CONNECTOR FOR
POOR CONNECTION
z
Turn ignition switch to off.
z
Disconnect the PCM connector.
z
Inspect for poor connection (such
as damaged, pulled-out pins,
corrosion).
z
Is there any malfunction?
Yes
Repair or replace suspected part, then go to
Step 12.
No
Go to the next step.
9
INSPECT A/C RELAY CONTROL
CIRCUIT FOR OPEN CIRCUIT
z
Turn the ignition switch off.
z
Inspect continuity between A/C
relay terminal E (wiring harness-
side) and PCM terminal 1N
(wiring harness-side).
z
Is there continuity?
Yes
Go to the next step.
No
Repair or replace suspected part, then go to
Step 12.
2007 Mazda CX-9 Grand Touring
2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
Microsoft
Sunday, November 15, 2009 9:26:35 AM
Page 322
© 2005 Mitchell Repair Information Company, LLC.