DTC P0511 [L3]

BME010200500210

DTC P0511

IAC valve circuit malfunction

DETECTION CONDITION

• If PCM detects that PCM terminal 4G voltage is above or below threshold* when IAC control duty target is within18-70%, PCM determines that IAC valve circuit has malfunction.
*: Detected threshold value depends on battery voltage and IAC control signal duty value.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction conditions in first drive cycle.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in PCM memory.

POSSIBLE CAUSE

• IAC valve circuit malfunction
• Short to ground between IAC valve terminal A and PCM terminal 4G
• Open circuit between IAC valve terminal A and PCM terminal 4G
• Short to ground between IAC valve terminal B and PCM terminal 4J
• Open circuit between IAC valve terminal B and PCM terminal 4J
• Short to power between IAC valve terminal A and PCM terminal 4G
• Poor connection of IAC valve connector or PCM connector
• PCM malfunction

Diagnostic procedure

STEP

INSPECTION

ACTION

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
• Is same DTC present?
Yes
Go to the next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
2
INSPECT POOR CONNECTION OF IAC VALVE CONNECTOR
• Turn the ignition switch off.
• Disconnect IAC valve connector.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair or replace terminal, then go to Step 8.
No
Go to the next step.
3
INSPECT IAC VALVE ELECTRICAL MALFUNCTION
• Inspect IAC valve.
• Is IAC valve normal?
Yes
Go to the next step.
No
Replace IAC valve, then go to Step 8.
4
INSPECT CONTROL CIRCUIT FOR SHORT TO POWER
• Turn the ignition switch to the ON position (Engine off).
• Measure voltage between following IAC valve terminal and body ground.
- IAC valve terminal A and body ground
- IAC valve terminal B and body ground
• Is the voltage B+?
Yes
Repair or replace harness, then go to Step 8.
No
Go to the next step.
5
INSPECT CONTROL CIRCUIT FOR SHORT TO GROUND
• Turn the ignition switch off.
• Inspect for continuity between following IAC valve terminals and body ground.
- IAC valve terminal A
- IAC valve terminal B
• Is there continuity?
Yes
Repair or replace harness, then go to Step 8.
No
Go to the next step.
6
INSPECT POOR CONNECTION OF PCM CONNECTOR
• Turn the ignition switch off.
• Disconnect PCM connector.
• Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.).
• Is there any malfunction?
Yes
Repair terminal, then go to Step 8.
No
Go to the next step.
7
INSPECT CONTROL CIRCUIT MALFUNCTION FOR OPEN CIRCVIT
• Inspect for continuity between following IAC valve terminal and PCM terminal.
- IAC valve terminal A and PCM terminal 4G
- IAC valve terminal B and PCM terminal 4J
• Is there continuity?
Yes
Repair or replace harness, then go to the next step.
No
Go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P0511 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC using WDS or equivalent.
• Perform KOEO/KOER self-test.
• Is same DTC present?
Yes
Replace PCM, then go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.