STEP
3
VERIFY RELATED PENDING OR STORED
DTCS
• Turn ignition key to OFF, then ON (Engine
OFF).
• Verify pending code or stored DTCs using
WDS or equivalent.
• Is other DTC present?
4
INSPECT IAC VALVE MALFUNCTION
• Perform IAC valve inspection.
(See
F13 IDLE AIR CONTROL (IAC) VALVE
INSPECTION.)
• Is IAC valve okay?
5
INSPECT A/C MAGNET CLUTCH OPERATION
• Turn blower motor switch off.
• Is magnet clutch still on?
6
INSPECT PURGE SOLENOID VALVE
MALFUNCTION
• Perform purge solenoid valve inspection.
(See
F39 PURGE SOLENOID VALVE
INSPECTION.)
• Is purge solenoid valve okay?
7
INSPECT AIR CLEANER ELEMENT
• Remove air cleaner element with engine
running.
• Is engine speed increased?
8
INSPECT THROTTLE BODY PASSAGE
• Is throttle body clogged?
9
INSPECT ENGINE COMPRESSION
• Inspect engine compression.
(See
B9 COMPRESSION
• Is engine compression okay?
10
INSPECT GENERATOR
• Perform generator inspection.
(See
G7 GENERATOR
• Is generator okay?
11
VERIFY TROUBLESHOOTING OF DTC P0506
COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Start engine.
• Clear DTC from PCM memory using WDS or
equivalent.
• Depress brake pedal for 14 s or more.
• Is PENDING CODE the same as DTC
present?
12
VERIFY AFTER REPAIR PROCEDURE
• Perform After Repair Procedure.
(See
F66 AFTER REPAIR
• Is there any DTC present?
End Of Sie
F146
ON-BOARD DIAGNOSTIC
INSPECTION
INSPECTION.)
INSPECTION.)
PROCEDURE.)
Yes Repair applicable DTCs.
(See
F67 DTC
TABLE.)
No
Go to net step.
Yes Go to net step.
No
Replace IAC valve, then go to Step 11.
Yes Refer to A/C is always on or A/C compressor runs
continuously. of ENGINE SYMPTOM
TROUBLESHOOTING, then go to Step 11.
(See
F181 ENGINE SYMPTOM
No
Go to net step.
Yes Go to net step.
No
Replace purge solenoid valve, then go to Step 11.
Yes Replace air cleaner element, then go to Step 11.
No
Go to net step.
Yes Clean or replace throttle body passage, then go to Step 11.
No
Go to net step.
Yes Go to net step.
No
Overhaul engine, then go to Step 11.
Yes Go to net step.
No
Repair or replace related part, then go to net step.
Yes Replace PCM, then go to net step.
(See
F43 PCM
REMOVAL/INSTALLATION.)
No
Go to net step.
Yes Go to applicable DTC troubleshooting.
(See
F67 DTC
TABLE.)
No
Troubleshooting completed.
ACTION
TROUBLESHOOTING.)