Without Scan Tool
HOW TO DISPLAY AND READ DIAGNOSTIC TROUBLE CODES WITHOUT A SCAN TOOLNormal 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 range
(d) Accessories switched OFF
(e) Engine at normal operating temperature
2. Turn the ignition switch ON. Do not start the engine.
3. Using SST, connect terminals TE1 and E1 of the TOYOTA DIAGNOSTIC COMMUNICATION LINK (TDCL). SST 09843-18020
Note: Even if check connector terminals TE1 and E1 are connected, the diagnostic code can be output.
4. Read the diagnostic code as indicated by the number of flashes of the "CHECK" engine warning light.
Diagnostic Code Output
(a) Normal System Operation (no malfunction)
The light will alternately blink ON and OFF at 0.25 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 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.
(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 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.) In the Test Mode, the "CHECK" Engine Warning Light lights up the 1st time a malfunction is detected.
5. After the diagnosis check, remove SST. SST 09843-18020
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 range
(d) Accessories switched OFF
2. First, using SST, connect terminals TE2 and E1 of the TDCL, then turn the ignition switch on to begin the diagnosis in the test mode. SST 09843-18020
Note: To confirm that the test mode is operating, check that the "CHECK" engine light flashes when the ignition switch is turned ON.
3. Start the engine and drive the vehicle at a speed of 10 km/h or higher.
4. Simulate the conditions of the malfunction described by the customer.
5. Using SST, connect terminals TE1 and E1 of the TDCL. SST 09843-18020
6. Read the diagnostic code as indicated by the number of flashes of the "CHECK" engine warning light.
7. After the diagnosis check, remove SST. SST 09843-18020
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 step no.3 is not performed.