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DTC P0505 [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010200500202

DTC P0505 | IAC valve circuit malfunction
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DETECTION CONDITION | • The PCM monitors the IAC valve circuit current while IAC duty is above 18%. If the PCM detected IAC valve circuit current below 100 mA (25 °C {77 °F}) or above 4.5 A (25 °C {77 °F}) for 1 s, the PCM determines that the IAC valve circuit has malfunction. Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition during first drive cycle.
• PENDING CODE is not available.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.
POSSIBLE CAUSE | • IAC valve circuit malfunction • Short to ground between IAC valve terminal A and PCM terminal 54 • Open circuit between IAC valve terminal A and PCM terminal 54 • Short to ground between IAC valve terminal B and PCM terminal 83 • Short to power between IAC valve terminal B and PCM terminal 83
• Open circuit between IAC valve terminal B and PCM terminal 83
• Poor connection of IAC valve connector or PCM connector
• 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 repair order, then go to the next step.
2 | VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Check for related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to available Service Information. • If vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | CLASSIFY INTERMITTENT CONCERN OR CONTINUOUS CONCERN • Clear DTC using WDS or equivalent. • Start engine and warm it up completely. • Is the same DTC detected? | Yes | Go to the next step.
No | Go to intermittent concern. (See INTERMITTENT CONCERN TROUBLESHOOTING [AJ].)
4 | INSPECT IAC VALVE CONNECTOR FOR POOR CONNECTION • 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 the terminal, then go to Step 14.
No | Go to the next step.
5 | INSPECT IAC VALVE • Perform IAC valve inspection. (See IDLE AIR CONTROL (IAC) VALVE INSPECTION [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)) • Is the IAC valve normal? | Yes | Go to the next step.
No | Replace the IAC valve, then go to Step 14.
6 | CLASSIFY MALFUNCTION AT POWER SUPPLY CIRCUIT OR CONTROL CIRCUIT • Turn the ignition switch to the On position (Engine off). • Measure the voltage between IAC valve terminal A (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Malfunction at control circuit. Go to step 10.
No | Malfunction at power supply circuit. Go to the next step.
7 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect PCM connector. • Inspect for poor connection (damaged, pulled-out terminals, corrosion, etc.). • Is there any malfunction? | Yes | Repair the terminal, then go to Step 14.
No | Go to the next step.
8 | INSPECT POWER CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch off. • Inspect for continuity between IAC valve terminal A (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground, then go to Step 14.
No | Go to the next step.
9 | INSPECT POWER CIRCUIT FOR OPEN CIRCUIT • Turn the ignition switch off • Disconnect PCM connector. • Inspect for continuity between IAC valve terminal A (wiring harness-side) and PCM terminal 54. • Is there continuity? | Yes | Repair or replace the wiring harness for open circuit, then go to Step 14.
No | Go to step 14.
10 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off • Disconnect the PCM connector. • Inspect for poor connection (such as damaged/pulled-out terminals, corrosion). • Is there any malfunction? | Yes | Repair the terminal, then go to Step 14.
No | Go to the next step.
11 | INSPECT CONTROL CIRCUIT FOR SHORT TO POWER • Turn the ignition switch to the On position (Engine off). • Measure the voltage between IAC valve terminal B (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Repair or replace the wiring harness for short to power supply, then go to Step 14.
No | Go to the next step.
12 | INSPECT CONTROL CIRCUIT FOR SHORT TO GROUND • Turn the ignition switch off. • Inspect for continuity between IAC valve terminal B (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace the wiring harness for short to ground, then go to Step 14.
No | Go to the next step.
13 | INSPECT CONTROL CIRCUIT MALFUNCTION FOR OPEN CIRCUIT • Disconnect the PCM connector. • Inspect for continuity between IAC valve terminal B (wiring harness-side) and PCM terminal 83. • Is there continuity? | Yes | Repair or replace the wiring harness for open circuit, then go to the next step.
No | Go to the next step.
14 | VERIFY TROUBLESHOOTING OF DTC P0505 COMPLETED • Make sure to reconnect all disconnected connectors. • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine and warm it up completely. • Is the same DTC present? | Yes | Replace the PCM, then go to the next step.
No | Go to the next step.
15 | VERIFY AFTER REPAIR PROCEDURE • Perform "After Repair Procedure". (See AFTER REPAIR PROCEDURE [AJ].) • Is there any DTC present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
No | Troubleshooting completed.