Toyota Corolla (E120) 2002–2008 Repair Manual / Diagnostics / Cruise control system / Actuator motor circuit / Inspection procedure
Toyota Corolla (E120): Inspection procedure
1 Inspect cruise control actuator assy
- Turn the ignition switch to off.
- disconnect the cruise control actuator assy connector.
- measure the resistance between terminals 1 (mo) and 2 (mc) of cruise control actuator assy.
Hint
: if control plate position is fully opened or fully closed, resistance cannot be measured.
Ok: resistance: more than 4.2 Ω
2 Check harness and connector(between cruise control ecu assy and cruise control actuator assy)
- Check for open and short circuit in harness and connector between cruise control ecu assy and cruise control actuator assy (actuator motor)
Check and replace cruise control ecu assy
Other materials:
Adjusting the set speed
To change the set speed, operate the lever until the desired set speed is obtained.
1 Increases the speed
2 Decreases the speed
Fine adjustment: Momentarily move the lever in the desired direction.
Large adjustment: Hold the lever in the desired direction.
The set speed will be increased or dec ...
How to proceed with troubleshooting
1 Vehicle brought to workshop
2 Customer problem analysis
3 Check and clear dtcs and freeze frame data
4 Problem symptom confirmation
Symptom does not occur: go to
step 5
Symptom occurs: go to step 6
5 Symptom simulation
6 Dtc check
There is no
output: go to step 7
There is outp ...
Circuit description
The actuator motor is operated by signals from the cruise control ecu assy.
Acceleration and deceleration
signals are transmitted by changes in the duty ratio (see below).
Duty ratio:
the duty ratio is the ratio of the period of continuity in one cycle. For
example, if a is the period of co ...