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

Normal 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 IDL points closed).
(c) Transmission in neutral.
(d) Accessories switched OFF.
(e) Engine at normal operating temperature.

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





3. Using a service wire, connect terminals TE1 and E1 of the TOYOTA DIAGNOSTIC COMMUNICATION LINK (TDCL).





NOTE: Even if check connector terminals TE1 and E1 are connected, the diagnosis code can be output.





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 at 0.26 second intervals.





(b) Malfunction Code Indication:

- In the event of a malfunction, the light will blink every 0.52 seconds. The first number of blinks will equal the first digit of a two digit diagnostic code and, after a 1.5 second pause, the second number of blinks will equal the second digit. 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 TDCL or check connector are connected.

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

5. After the diagnosis check, remove the service wire.

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 IDL points closed).
(c) Transmission in neutral position.
(d) Accessory switches OFF.





2. First, using a service wire, connect terminals TE2 and E1 of the TDCL, then turn the ignition switch on to begin the diagnosis in the test mode.





NOTE: To confirm that the test mode is operating, check that the "CHECK" engine light flashes when the ignition switch is turned to ON.

3. Start the engine and drive the vehicle at a speed of 10 kph or higher.

4. Simulate the conditions of the malfunction described by the customer.





5. Using a service wire, connect terminals TE1 and E1 of the TDCL.

6. Read the diagnosis code as indicated by the number of flashes of the "CHECK" engine warning light.

7. After the diagnosis check, remove the service wires.

NOTE:

- 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 ECU as malfunctions, and code Nos. 42, and 43 will be output, if the operation in Test Mode Step 3 above, is not performed.