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NO.9 FAST IDLE/RUNS ON [AJ]

BME010300103214

9 | Fast idle/runs on
DESCRIPTION | • Engine speed continues at fast idle after warm up. • Engine runs after the ignition switch is turned off.
POSSIBLE CAUSE | • ECT sensor malfunction • Air leakage from intake-air system • Throttle body malfunction • Accelerator cable free play misadjustment • Cruise control cable misadjustment

Diagnostic procedure

STEP | INSPECTION | ACTION
--- | --- | ---
1 | • Connect the WDS or equivalent to the DLC-2. • Access ECT PID. • Start and warm up the engine to normal operating temperature. • Is ECT PID reading between 82-112 °C {180-234 °F}? | Yes | Go to the next step.
No | ECT PID is above 112 °C {234 °F}: • Go to symptom troubleshooting "No.17 Cooling system concerns-Overheating". (See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513).)
(See NO.17 COOLING SYSTEM CONCERNS-OVERHEATING [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
ECT PID is below 82 °C {180 °F}:
• Go to symptom troubleshooting "No.18 Cooling system concerns-Runs cold".
(See NO.18 COOLING SYSTEM CONCERNS-RUNS COLD [AJ].)
2 | • Connect the WDS or equivalent to the DLC-2. • Turn the ignition switch to the ON position (Engine off). • Retrieve any DTCs. • Is "PASSED" displayed? | Yes | No DTC is displayed: • Go to the next step.
No | DTC is displayed: • 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).) (See DTC TABLE [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed)).)
3 | • Is there air leakage felt or heard at the intake-air system components while racing the engine to higher speed? | Yes | Repair or replace the malfunctioning part if necessary.
No | Inspect for the accelerator cable free play. (See ACCELERATOR CABLE INSPECTION [AJ].)
4 | • Verify test results.

  - If normal, return to diagnostic index to service any additional symptoms.
  - If malfunction remains, inspect related Service Information and perform repair or diagnosis.

  • If vehicle is repaired, troubleshooting completed.
  • If vehicle is not repaired or additional diagnostic information is not available, replace or reprogram the PCM.