Without Scan Tool

CHECK ENGINE WARNING LIGHT CHECK





1. The check engine warning light will come on when the ignition switch is placed at ON and the engine is not running.
2. When the engine is started, the check engine warning light should go off. If the light remains on, the diagnosis system has detected a malfunction or abnormality in the system.

OUTPUT OF DIAGNOSTIC CODES

To obtain an output of diagnostic codes, proceed as follow:

1. Initial conditions
(a) Battery voltage 11 V or more
(b) Throttle valve fully closed (throttle position sensor IDL points closed)
(c) Transmission in neutral position
(d) Accessories switched OFF
(e) Engine at normal operating temperature

2. Turn the ignition switch to ON. Do not start the engine.





3. Using SST 09843-18020, connect terminals TE1 and E1 of the check connector.





4. Read the diagnostic code as indicated by the number of flashes of the check engine warning light.





(a) Normal System Operation (no malfunction).
- The light will alternately blink ON and OFF 2 times per second.





(b) Malfunction Code Indication.
- In the event of a malfunction, the light will blink every 0.5 seconds. The first number of blinks will equal the first digit of a 2-digit diagnostic code and, after a 1.5 second pause, the 2nd number of blinks will equal the 2nd. If there are two or more codes, there will be a 2.5 second pause between each.
- After all the codes have been signalled there will be a 4.5 second pause and they will all be repeated as long as the terminals TE1 and E1 of the check connector are shorted.

NOTE: In the event of a number of trouble codes, indication will begin from the smaller value and continue in order to the larger.





(c) (2 trip detection logic)
Diagnostic codes 21, 25, 26, 27 and 71 use "2 trip detection logic". With this logic, when a malfunction is first detected, the malfunction is temporarily stored in the ECU memory. If the same case is detected again during the second drive test, this second detection causes the "CHECK" engine warning light to light up.

The 2 trip repeats the same mode a 2nd time. (However, the ignition switch must be turned OFF between the 1st time and 2nd time).





5. After the diagnostic check, remove SST 09843-18020.