Mazda 3 - Dtc P0506 [Lf]

Mazda 3 Workshop Manual – Engine + Wiring Diagrams + Diagnostic Trouble Codes
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• Is the magnetic clutch still on?
5
INSPECT GENERATOR CONTROL
CIRCUIT MALFUNCTION
• Apply electrical load.
• Is engine speed increased?
Yes
Go to the next step.
No
Repair short to power supply in generator control
circuit, then go to Step 9.
6
INSPECT AIR CLEANER ELEMENT
• Remove air cleaner element with the
engine running.
• Is the engine speed increased?
Yes
Clean or replace the air cleaner element, then go
to Step 9.
No
Go to the next step.
7
INSPECT THROTTLE BODY
PASSAGE
• Is throttle body clogged?
Yes
Clean or replace the throttle body passage, then
go to Step 9.
No
Go to the next step.
8
INSPECT ENGINE COMPRESSION
• Inspect engine compression.
(See COMPRESSION INSPECTION
[LF].)
• Is engine compression normal?
Yes
Go to the next step.
No
Overhaul the engine, then go to the next step.
9
VERIFY TROUBLESHOOTING OF
DTC P0505 COMPLETED
• Make sure to reconnect all
disconnected connectors.
• Clear the DTC using the WDS or
equivalent.
• Perform the KOER Self-Test.
• Is the same DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [LF].)
No
Go to the next step.
10
VERIFY AFTER REPAIR
PROCEDURE
• Perform the "After Repair Procedure".
(See AFTER REPAIR PROCEDURE
[LF].)
• Are any DTC present?
Yes
Go to the applicable DTC troubleshooting.
(See DTC TABLE [LF].)
No
Troubleshooting completed.
DTC P0506 [LF]
B3E010201087W03
DTC P0506
Idle control system RPM lower than expected