NO.7 SLOW RETURN TO IDLE [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)


7	Slow return to idle
DESCRIPTION	• Engine takes more time than normal to return to idle speed.
POSSIBLE CAUSE	• ECT sensor malfunction • Thermostat is stuck open. • Throttle body malfunction • Air leakage from intake-air system


STEP	INSPECTION		ACTION
1	• 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.
1		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).)
2	• Remove the thermostat and inspect the operation. (See THERMOSTAT REMOVAL/INSTALLATION [AJ].) (See THERMOSTAT INSPECTION.) • Is the thermostat normal?	Yes	The ECT and the thermostat are normal. Go to the next step.
2		No	Access ECT PID. Inspect for both ECT PID and the temperature gauge on the instrument cluster readings. • If the temperature gauge on the instrument cluster indicates normal range but ECT PID is not the same as the temperature gauge reading, inspect the ECT sensor. • If the temperature gauge on the instrument cluster indicates cold range but ECT PID is normal, inspect the temperature gauge and heat gauge unit.
3	• Is the throttle body free of contaminations?	Yes	Inspect for air leakage from the intake-air system components while racing the engine to higher speed.
3	• Is the throttle body free of contaminations?	No	Clean or replace the throttle body.
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.