6
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.
10
INSPECT A/C RELAY
z
Inspect A/C relay. (See
RELAY
INSPECTION
.)
z
Is A/C relay normal?
Yes Go to the next step.
No
Replace the A/C relay. Start the engine. Turn on
the A/C switch. Wait for 15 s. Turn off the A/C
switch, then go to Step 12.
INSPECT FOR CORRECT PCM
OPERATION
2008 Mazda CX-9 Grand Touring
2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
Microsoft
Sunday, November 15, 2009 10:08:40 AM
Page 299
© 2005 Mitchell Repair Information Company, LLC.
