Precheck Inspection

DIAGNOSIS SYSTEM





A. Check the indicator.
1. Turn the ignition switch ON.
2. Check that the CRUISE MAIN indicator light comes ON when the cruise control main switch is turned ON, and that the indicator light goes OFF when the main switch is turned OFF.

HINT: If the indicator check result is not normal, proceed to troubleshooting the combination meter.





B. Check the DTC.

HINT: If a malfunction occurs in the No. 1 vehicle speed sensor or actuator, etc. during cruise control driving, the ECU actuate AUTO CANCEL of the cruise control and turns ON and OFF the CRUISE MAIN indicator light to inform the driver of a malfunction. At the same time, the malfunction is stored in memory as a DTC.





1. Output of DTC using diagnosis check wire.
2. Turn the ignition switch ON.
3. Using SST, connect terminals Tc and E1 of DLC2.

SST 09843 - 18020

4. Read the DTC on the CRUISE MAIN indicator light.

HINT: If the DTC is not output, inspect the diagnosis circuit.





As an example, the blinking patterns for codes; normal, 11 and 21 are shown in the illustration.

C. Using the TOYOTA hand-held tester





1. Hook up the TOYOTA hand-held tester to the DLC2.
2. Monitor the ECU data by following the prompts on the tester screen.

HINT: TOYOTA hand-held tester has a "Snapshot" function which records the monitored data.

Please see the TOYOTA hand-held tester operator's manual for further details.

D. DTC Clearance (Erase Mode)

HINT: During in the erase mode, diagnostic detection does not work.





1. Stop the vehicle.
2. Using SST, connect terminals Tc and E1 of DLC1.

SST 09843 - 18020

3. Pull the cruise control switch to CANCEL.
4. On the above mentioned condition, turn on the cruise control main switch 5 times within 3 seconds.