DTC P0506:00 [MZI-3.7]

id0102d2705000

DTC P0506:00 | IAC system RPM lower than expected
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DETECTION CONDITION | • This DTC is set when the PCM detects an engine idle speed that is less than the desired engine speed.
POSSIBLE CAUSE | • Engine mechanical concern • Intake air restriction • Vacuum leakage • Exhaust restriction • Sludged throttle body • Throttle body malfunction • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record FREEZE FRAME DATA on the 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 OR STORED DTCS • Turn the ignition switch off then to the ON position (Engine off). • Verify pending code or stored DTCs using the M-MDS. • Is other DTC present? | Yes | Repair applicable DTCs. (See DTC TABLE [MZI-3.7].)
No | Go to the next step.
4 | INSPECT AIR CLEANER ELEMENT • Remove air cleaner element with the engine running. • Is the engine speed increased? | Yes | Replace the air cleaner element, then go to Step 7.
No | Go to the next step.
5 | INSPECT INTAKE AIR SYSTEM FOR EXCESSIVE AIR SUCTION • Visually inspect the hose in intake air system for damages. • Is there any malfunction? | Yes | Repair or replace the malfunctioning part, then go to Step 7.
No | Go to the next step.
6 | INSPECT THROTTLE BODY PASSAGE • Is the throttle body clogged? | Yes | Clean or replace the throttle body passage, then go to the next step.
No | Go to the next step.
7 | VERIFY TROUBLESHOOTING OF DTC P0506:00 HAS BEEN COMPLETED • Verify that all disconnected connectors reconnected. • Start the engine. • Clear the DTC from the PCM memory using the M-MDS. • Depress brake pedal for 14 s or more. • Is PENDING CODE for this DTC present? | Yes | Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZI-3.7].) Go to the next step.
No | Go to the next step.
8 | VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
No | Troubleshooting completed.