DTC P0506:00 [L3 Turbo]SM2444112
DTC P0506:00 [L3 Turbo]

id0102b7705000

DTC P0506:00

IAC system RPM lower than expected
DETECTION CONDITION
• Actual idle speed is lower than the specified engine speed (varies according to the engine coolant temperature) for 14 s when the brake pedal is depressed (brake switch is on) and the steering wheel is held straight ahead (power steering pressure switch is off).
Note
• If the atmospheric pressure is less than 72.3 kPa {542 mmHg, 21.3 inHg} or the intake air temperature is below –10 °C {14 °F}, the PCM cancels the diagnosis of P0506:00.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if the PCM detects the above malfunction condition in two consecutive drive cycles or in one drive cycle while the DTC for the same malfunction has been stored in the PCM.
• PENDING CODE is available if PCM detects the above malfunction condition during the first drive cycle.
• FREEZE FRAME DATA (Mode 2)/Snapshot data is available.
• DTCs are stored in PCM memory.
POSSIBLE CAUSE
• A/C relay control circuit malfunction
• Electronic throttle control system malfunction
• Purge solenoid valve malfunction
• Air cleaner element clogged
• Air intake passage clogged
• Generator malfunction
• Low engine compression (Over capacity of blow-by gas)
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION
1
VERIFY FREEZE FRAME DATA (MODE 2)/SNAPSHOT DATA HAS BEEN RECORDED
• Has the FREEZE FRAME DATA (Mode 2)/snapshot data been recorded?
Yes
Go to the next step.
No
Record the FREEZE FRAME DATA (Mode 2)/snapshot data on repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Verify related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to the available Service Information.
• If the vehicle is not repaired, go to the next step.
No
Go to the next step.
3
VERIFY RELATED PENDING CODE AND STORED DTC
• Turn the ignition switch off, then to the ON position (engine off).
• Perform the DTC Reading Procedure and Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Are any other DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [L3 Turbo].)
No
Go to the next step.
4
INSPECT A/C MAGNET CLUTCH OPERATION
• Turn the blower motor switch off.
• Is the magnet clutch still on?
Yes
Perform the symptom troubleshooting “NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY”.
(See NO.24 A/C IS ALWAYS ON OR A/C COMPRESSOR RUNS CONTINUOUSLY [L3 Turbo].)
No
Go to the next step.
5
INSPECT ELECTRONIC THROTTLE CONTROL SYSTEM RELATED SENSOR
• Turn the ignition switch off.
• Inspect the following parts:
― APP sensor (See ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [L3 Turbo].)
― TP sensor (See THROTTLE POSITION (TP) SENSOR INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to Step 11.
(See ACCELERATOR PEDAL REMOVAL/INSTALLATION [L3 Turbo].)
(See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
6
INSPECT PURGE SOLENOID VALVE
• Inspect the purge solenoid valve. (See PURGE SOLENOID VALVE INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Replace the purge solenoid valve, then go to Step 11.
(See PURGE SOLENOID VALVE REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
7
INSPECT AIR CLEANER ELEMENT
• Remove the air cleaner element with the engine running.
• Does the engine speed increase?
Yes
Clean or replace the air cleaner element, then go to Step 11.
No
Go to the next step.
8
INSPECT THROTTLE BODY PASSAGE
• Visually inspect the throttle body passage.
• Is the throttle body clogged?
Yes
Clean or replace the throttle body passage, then go to Step 11.
No
Go to the next step.
9
INSPECT GENERATOR
• Inspect the generator. (See GENERATOR INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Replace the generator, then go to Step 11.
(See GENERATOR REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
10
INSPECT ENGINE COMPRESSION
• Inspect the engine compression. (See COMPRESSION INSPECTION [L3 Turbo].)
• Is there any malfunction?
Yes
Repair or replace the malfunctioning part according to the inspection results, then go to the next step.
No
Go to the next step.
11
VERIFY DTC TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected connectors.
• Start the engine.
• Clear the DTC from the PCM memory using the M-MDS. (See AFTER REPAIR PROCEDURE [L3 Turbo].)
• Depress the brake pedal for 14 s or more.
• Perform the Pending Trouble Code Access Procedure. (See ON-BOARD DIAGNOSTIC TEST [L3 Turbo].)
• Is the PENDING CODE for this DTC present?
Yes
Replace the PCM, then go to the next step.
(See PCM REMOVAL/INSTALLATION [L3 Turbo].)
No
Go to the next step.
12
VERIFY AFTER REPAIR PROCEDURE
• Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [L3 Turbo].)
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [L3 Turbo].)
No
DTC troubleshooting completed.