Mazda CX-9 Grand Touring 2009 Manual page 1009

2008 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.7) - Mazda CX-9
VERIFY RELATED PENDING CODE OR STORED
DTC
3
Verify the related PENDING CODE or stored
DTCs.
Are other DTCs present?
INSPECT FUEL PUMP RELAY CONNECTOR FOR
POOR CONNECTION
Turn the ignition switch off.
4
Disconnect the fuel pump relay.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Are there malfunction?
INSPECT PCM CONNECTOR FOR POOR
CONNECTION
Turn the ignition switch off.
5
Disconnect PCM connector.
Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
Are there malfunction?
INSPECT FUEL PUMP RELAY POWER SUPPLY
CIRCUIT FOR OPEN CIRCUIT
Turn the ignition switch to the ON position (Engine
off).
6
Measure voltage between fuel pump relay
connector terminal C (wiring harness-side) and
body ground.
Is voltage B+?
INSPECT FUEL PUMP MONITOR CIRCUIT FOR
OPEN CIRCUIT
Turn the ignition switch off.
7
Inspect continuity between fuel pump relay
terminal D (wiring harness-side) and PCM terminal
1Q (wiring harness-side).
Is there continuity?
INSPECT FUEL PUMP RELAY
8
Inspect the fuel pump relay. (See RELAY
2008 Mazda CX-9 Grand Touring
No Go to the next step.
Go to appropriate DTC inspection.
Yes
(See DTC TABLE [MZI-3.7].)
No Go to the next step.
Repair or replace suspected part,
Yes
then go to Step 9.
No Go to the next step.
Repair or replace suspected part,
Yes
then go to Step 9.
No Go to the next step.
Yes Go to the next step.
Repair or replace suspected part,
No
then go to Step 9.
Yes Go to the next step.
Repair or replace suspected part,
No
then go to Step 9.
Replace the fuel pump relay, then
Yes
go to the next step.