Mazda 3 Workshop Manual page 141

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection (such as
damaged/pulled-out pins, corrosion).
• Is there any malfunction?
INSPECT EGR VALVE CIRCUIT FOR
OPEN CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between the following
terminals:
- EGR valve terminal C (wiring
harness-side) and PCM terminal
2BG (wiring harness-side)
- EGR valve terminal D (wiring
harness-side) and PCM terminal
2BG (wiring harness-side)
- EGR valve terminal E (wiring
8
harness-side) and PCM terminal 2Z
(wiring harness-side)
- EGR valve terminal A (wiring
harness-side) and PCM terminal 2V
(wiring harness-side)
- EGR valve terminal B (wiring
harness-side) and PCM terminal 2R
(wiring harness-side)
- EGR valve terminal F (wiring
harness-side) and PCM terminal 2N
(wiring harness-side)
• Is there continuity?
VERIFY TROUBLESHOOTING OF DTC
P0403 COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC from the PCM memory using
9
the WDS or equivalent.
• Start the engine.
• Is the PENDING CODE for this DTC
present?
VERIFY AFTER REPAIR PROCEDURE
• Perform the "AFTER REPAIR
10
PROCEDURE".
(See AFTER REPAIR PROCEDURE
Downloaded from
[Z6].)
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No Go to the next step.
Yes Go to the next step.
Repair or replace the wiring harness for a
No possible open circuit, then go to the next
step.
Replace the PCM, then go to the next step.
Yes
(See PCM REMOVAL/INSTALLATION
No Go to the next step.
Go to the applicable DTC inspection.
Yes
(See DTC TABLE [Z6].)
No DTC troubleshooting completed.
- automotive repair manuals website
[Z6].)