Mazda CX-9 Grand Touring 2007 Manual page 500

2007 ENGINE PERFORMANCE On-Board Diagnostic (MZI-3.5) - CX-9
position (Engine off).
Measure voltage between fuel pump
relay connector terminal C (wiring
harness-side) and body ground.
Is voltage B+ ?
7 INSPECT FUEL PUMP MONITOR
CIRCUIT FOR OPEN CIRCUIT
Turn the ignition switch off.
Inspect continuity between fuel
pump relay terminal D (wiring
harness-side) and PCM terminal 1Q
(wiring harness-side).
Is there continuity?
8 INSPECT FUEL PUMP RELAY
Inspect the fuel pump relay.
(see RELAY INSPECTION .)
Is there any malfunction?
9 VERIFY TROUBLESHOOTING OF
DTC P0231 HAS BEEN COMPLETED
Verify that all disconnected
connectors reconnected.
Clear DTC from memory using M-
MDS.
Start the engine.
Perform the "KOEO/KOER self-
test"
(See KOEO/KOER SELF TEST
[MZI-3.5].)
Is same DTC present?
10 VERIFY AFTER REPAIR
PROCEDURE
Perform the "AFTER REPAIR
PROCEDURE".
(See AFTER REPAIR
PROCEDURE [MZI-3.5].)
2007 Mazda CX-9 Grand Touring
Yes
No
Yes
No
Yes
No
Yes
No
to Step 9.
Go to the next step.
Repair or replace suspected part, then go
to Step 9.
Replace the fuel pump relay, then go to
the next step.
Go to the next step.
Replace the PCM, then go to the next
step.
Go to the next step.
Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.5].)
Troubleshooting completed.