NO.8 FAST IDLE/RUNS ON [F2]

id010394850100

8

FAST IDLE/RUNS ON
DESCRIPTION
•  The engine speed continues during at fast idle after warm-up.
•  The engine runs after the ignition switch is off.
POSSIBLE CAUSE
•  ECT sensor malfunction
•  Air leakage from intake-air system
•  Throttle body malfunction

Diagnostic procedure

STEP

INSPECTION

RESULTS

ACTION
1
Connect the M-MDS to the DLC-2.
Access ECT PID.
Start and warm-up the engine to normal operating temperature.
Is ECT PID between 82—112°C {180—234°F}?
Yes
Go to the next step.
No
ECT PID is more than 112°C {234°F}:
Go to symptom troubleshooting “No.16 Cooling system concerns - Overheating”.
(See NO.16 COOLING SYSTEM CONCERNS-OVERHEATING [F2].)
ECT PID is less than 82°C {180°F}:
Go to symptom troubleshooting “No.17 Cooling system concerns - Runs cold”.
(See NO.17 COOLING SYSTEM CONCERNS-RUNS COLD [F2].)
2
Connect the M-MDS to the DLC-2.
Turn the ignition switch to the ON position (Engine off).
Retrieve any DTCs.
Are there any DTCs displayed?
Yes
DTC is displayed:
•  Go to appropriate the DTC inspection.
No
No DTC is displayed:
•  Inspect instrument cluster operation.
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 part if necessary.
No
Verify accelerator cable free play.
(See ACCELERATOR CABLE INSPECTION/ADJUSTMENT [F2].)
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 the PCM.