Mazda CX-9 Grand Touring 2009 Manual page 1006

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 A (harness-side) and body
ground.
Is voltage B+?
INSPECT FUEL PUMP CONTROL CIRCUIT
FOR SHORT TO GROUND
Turn the ignition switch to the ON position
(Engine off).
7
Inspect for continuity between fuel pump relay
connector terminal E (harness-side) and body
ground.
Is there continuity?
INSPECT FUEL PUMP CONTROL CIRCUIT
FOR OPEN CIRCUIT
2008 Mazda CX-9 Grand Touring
Go to appropriate DTC inspection.
Yes
(See DTC TABLE [MZI-3.7].)
No Go to the next step.
Repair or replace suspected part, then
Yes
go to Step 10.
No Go to the next step.
Repair or replace suspected part, then
Yes
go to Step 10.
No Go to the next step.
Yes Go to the next step.
Repair or replace suspected part, then
No
go to Step 10.
Repair or replace suspected part, then
Yes
go to Step 10.
No Go to the next step.
Yes Go to the next step.