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DTC P0660 [AJ]

BME010200600201

DTC P0660 | IMCC circuit malfunction
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DETECTION CONDITION | • PCM monitors input voltages from IMCC actuator while engine running. If voltage at PCM terminal 28 remains low or high, PCM determines that IMCC actuator circuit has a malfunction. Diagnostic support note • This is an intermittent monitor (Other).
• MIL does not come on.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is not available.
• DTC is not stored in the PCM memory.
POSSIBLE CAUSE | • IMCC actuator malfunction • Connector or terminal malfunction • Short to ground in wiring between IMCC actuator terminal B and PCM terminal 28 • Open circuit in wiring between main relay terminal D and IMCC actuator terminal A • Open circuit in wiring between IMCC actuator terminal B and PCM terminal 28
• Short to power circuit between IMCC actuator terminal B and PCM terminal 28
• PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | 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.
2 | CLASSIFY INTERMITTENT CONCERN OR CONTINUOUS CONCERN • Start engine. • Increase engine speed above 3,800 rpm. • Is the PENDING CODE same DTC present? | Yes | Go to the next step.
No | Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING [AJ].)
3 | INSPECT IMCC ACTUATOR CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the IMCC actuator connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Is there malfunction? | Yes | Repair or replace the terminal, then go to Step 10.
No | Go to the next step.
4 | INSPECT IMCC ACTUATOR POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT • Turn the ignition switch to the On position (Engine off). • Measure the voltage between IMCC actuator terminal A (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit, then go to Step 10.
5 | INSPECT IMCC ACTUATOR CONTROL CIRCUIT FOR SHORT TO POWER • Turn the ignition switch off. • Measure the voltage between IMCC actuator 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 10.
No | Go to the next step.
6 | INSPECT IMCC ACTUATOR CONTROL CIRCUIT FOR SHORT TO GROUND • Inspect for continuity between IMCC actuator 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 10.
No | Go to the next step.
7 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection at terminal 28. (such as damaged/pulled-out pins, corrosion). • Is there malfunction? | Yes | Repair the terminal, then go to Step 10.
No | Go to the next step.
8 | INSPECT IMCC ACTUATOR CONTROL CIRCUIT FOR OPEN CIRCUIT • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for continuity between IMCC actuator terminal B (wiring harness-side) and PCM terminal 28. • Is there continuity? | Yes | Go to the next step.
No | Repair or replace the wiring harness for open circuit, then go to Step 10.
9 | INSPECT IMCC ACTUATOR MALFUNCTION • Perform IMCC actuator inspection. (See INTAKE MANIFOLD COMMUNICATION CONTROL (IMCC) ACTUATOR INSPECTION [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
• Is the IMCC actuator normal?
Yes
Go to the next step.
No | Replace the IMCC actuator, then go to the next step.
10 | VERIFY TROUBLESHOOTING OF DTC P0660 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn the ignition switch to the On position (Engine off). • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine.
• Increase engine speed above 3,800 rpm.
• Is the PENDING CODE of same DTC present?
Yes
Replace the PCM, then go to the next step.
No | Go to the next step.
11 | 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.