No. 7 Slow Return To Idle: Notes

WARNING: This page is about a different variant/trim than selected.

POSSIBLE CAUSES DESCRIPTIONS

7	SLOW RETURN TO IDLE
DESCRIPTION	Engine takes more time than normal to return to idle speed. Engine speed continues at fast idle after warm-up
POSSIBLE CAUSE	ECT sensor or related circuit malfunction Thermostat is stuck open Fuel injection timing is incorrect Erratic signal from CKP sensor Erratic signal from CMP sensor Accelerator position sensor or related circuit malfunction Air suction in intake-air system MAF sensor or related circuit malfunction Fuel pressure sensor or related circuit malfunction Excessive fuel pressure Relief valve malfunction (built-in delivery pipe) Fuel injector malfunction Cooling fan control system malfunction Improper load signal input Injector driver module or related circuit malfunction WARNING: The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services: Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel. Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual. (See AFTER REPAIR PROCEDURE ). (See BEFORE REPAIR PROCEDURE ). CAUTION: Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.

SLOW RETURN TO IDLE

DESCRIPTION

Engine takes more time than normal to return to idle speed.
Engine speed continues at fast idle after warm-up

POSSIBLE CAUSE

ECT sensor or related circuit malfunction
Thermostat is stuck open
Fuel injection timing is incorrect
Erratic signal from CKP sensor
Erratic signal from CMP sensor
Accelerator position sensor or related circuit malfunction
Air suction in intake-air system
MAF sensor or related circuit malfunction
Fuel pressure sensor or related circuit malfunction
Excessive fuel pressure
Relief valve malfunction (built-in delivery pipe)
Fuel injector malfunction
Cooling fan control system malfunction
Improper load signal input
Injector driver module or related circuit malfunction
WARNING:
The following troubleshooting flow chart contains the fuel system diagnosis and repair procedures. Read the following warnings before performing the fuel system services:
- Fuel vapor is hazardous. It can easily ignite, causing serious injury and damage. Always keep sparks and flames away from fuel.
- Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injury or death and damage. Fuel can also irritate skin and eyes. To prevent this, always complete "BEFORE REPAIR PROCEDURE" and "AFTER REPAIR PROCEDURE" described in this manual.
  (See AFTER REPAIR PROCEDURE ).
  
  (See BEFORE REPAIR PROCEDURE ).
CAUTION:
- Disconnecting/connecting the quick release connector without cleaning it may possibly cause damage to the fuel pipe and quick release connector. Always clean the quick release connector joint area before disconnecting/connecting, and make sure that it is free of foreign material.