Without Scan Tool

MALFUNCTION INDICATOR LAMP





1. The malfunction indicator lamp will come on when the ignition switch is placed at ON and the engine is not running.

2. When the engine is started, the malfunction indicator lamp should go off.
If the light remains on, the diagnosis system has detected a malfunction or abnormality in the system.

OUTPUT OF DIAGNOSTIC CODES

(Normal Mode)

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

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 ON. Do not start the engine.





3. Using SST 09843-18020, connect terminals TE1 and E1 of the data link connector 1.





4. Read the diagnostic code as indicated by the number of flashes of the malfunction indicator lamp.





(a) Normal System Operation (no malfunction)
- The light will alternately blink ON and OFF at 0.26-second intervals.





(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 code.
- After all the codes have been output, there will be a 4.5-second pause and they will all be repeated as long as the terminals TE1 and E1 of the data link connector 1 are connected.

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





(c) 2 Trip Detection Logic.
Diagnostic codes 25, 26, 27 and 71 use "2 trip detection logic". With this logic, when a malfunctions is first detected, the malfunction is temporarily stored in the ECM memory. If the same case is detected again during the second drive test, this second detection causes the malfunction indicator lamp 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.) In the Test Mode, the malfunction indicator lamp lights up the 1st time a malfunction is detected.





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

(Test Mode)

HINT:
- Compared to the normal mode, the test mode has high sensing ability to detect malfunctions.
- It can also detect malfunctions in the starter signal circuit, air conditioner signal and neutral start switch signal.
- Furthermore, the same diagnostic items which are detected in the normal mode can also be detected in the test mode.

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

1. Initial conditions.
(a) Battery voltage 11 volts or more
(b) Throttle valve fully closed (throttle position sensor DL points closed)
(c) Transmission in neutral range
(d) Accessories switched OFF





2. First, using SST 09843-18020, connect terminals TE2 and E1 of the data link connector 1, then turn the ignition switch on to begin the diagnosis in the test mode.





HINT: To confirm that the test mode is operating, check that the malfunction indicator lamp flashes when the ignition switch is turned ON.

3. Start the engine and drive the vehicle at a speed of 10 km/h (6 mph) or higher.
4. Simulate the conditions of the malfunction described by the customer.





5. Using SST 09843-18020, connect terminals TE1 and E1 of the data link connector 1.

6. Read the diagnostic code as indicated by the number of flashes of the malfunction indicator lamp.





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

HINT: The test mode will not start if terminals TE2 and E1 are connected after the ignition switch is turned on.
The starter signal and vehicle speed signal will be diagnosed by the ECM as malfunctions, and code Nos. 42, and 43 will be output, if the operation in 3 above is not performed.