Initial Inspection and Diagnostic Overview

System Diagnosis

Indicator Check

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. See the instrument panel section.

DTC Check






HINT: If a malfunction occurs in the speed sensors or actuator, etc. during cruise control driving, the ECU actuates AUTO CANCEL of the cruise control and blinks the CRUISE MAIN indicator light 5 times to inform the driver of a malfunction. At the same time, the malfunction is stored in memory as a DTC.

Output of DTC






Using diagnosis check wire:

1. Turn the ignition switch ON.
2. Using SST, connect terminals Tc and E1 of DLC2.
3. Read the DTC on the CRUISE MAIN indicator light.

Hint: If the DTC is not output, inspect the Tc circuit.

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






4. Check for the problem using the DTC table.
5. After completing the check, disconnect terminals Tc and E1, and turn off the display.






DTC Clearance

1. After completing repairs, the DTC retained in memory can be cleared by removing the STOP fuse for 10 seconds or more, with the ignition switch off.
2. Check that the normal code is displayed after connecting the fuse.