Displaying & Reading Trouble Codes

NOTE: This is the only information provided by the manufacturer for reading diagnostic trouble codes for this system. TOYOTA does not provide a procedure for reading diagnostic trouble codes without a scan tool.

PRE-CHECK




1. ECU TERMINAL VALUES MEASUREMENT BY USING BREAK-OUT-BOX AND HAND-HELD TESTER
a. Hook up the break-out-box and hand-held tester to the vehicle.
b. Read the ECU input/output values by following the prompts on the tester screen.
c. Please refer to the hand-held tester has a "Snapshot" function. This records the measured data and is effective in the diagnosis of intermittent problems.




2. USING HAND-HELD TESTER
a. Hook up the hand-held tester to the DLC3.
b. Monitor the ECU data by following the prompts on the tester screen.

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

Please refer to the hand-held tester operator's manual for further details.

3. DTC CLEARANCE
DTC can be deleted using a hand-held tester. If there is no hand-held tester or it cannot be used, disconnect the auxiliary battery for 1 mm. or more and connect it again.




4. PROBLEM SYMPTOM CONFIRMATION (ROAD TEST)
a. Inspect the SET switch.
1. Push the main switch ON.
2. Drive at a desired speed (40 km/h (25 mph) or higher).
3. Press the control switch to the SET/COAST.
4. After releasing the switch, check that the vehicle cruises at the desired speed.




b. Inspect the ACCEL switch.
1. Push the main switch ON.
2. Drive at a desired speed (40 km/h (25 mph) or higher).
3. Check that the vehicle speed increases while the control switch is turned to RES/ACC, and that the vehicle cruises at the set speed when the switch is released.
4. Momentarily press the control switch upward in the RES/ACC and then immediately release it. Check that the vehicle speed increases by about 1.5 km/h (Tap-up function).




c. Inspect the COAST switch.
1. Push the main switch ON.
2. Drive at a desired speed (40 km/h (25 mph) or higher).
3. Check that the vehicle speed decreases while the control switch is turned to SET/COAST, and the vehicle cruises at the set speed when the switch is released.
4. Momentarily press the control switch is turned to SET/COAST, and then immediately release it. Check that the vehicle speed decreases by about 1.5 km/h (Tap-down function).




d. Inspect the CANCEL switch.
1. Push the main switch ON.
2. Drive at a desired speed (40 km/h (25 mph) or higher).
3. When operating one of the followings, check that the cruise control system is cancelled and that the normal driving mode is reset.
- Depress the brake pedal
- Shift to except D range (A/T)
- Push the main switch OFF
- Pull the cruise control switch to CANCEL




e. Inspect the RESUME switch.
1. Push the main switch ON.
2. Drive at a desired speed (40 km/h (25 mph) or higher).
3. When operating one of the followings, check that the cruise control system is cancelled and that the normal driving mode is reset.
- Depress the brake pedal
- Shift to except D range (A/T)
- Pull the cruise control switch to CANCEL

4. After the control switch is turned to RES/ACC at the driving speed of more than 40 km/h (25 mph), check that the vehicle restores the speed prior to the cancellation.




5. INPUT SIGNAL CHECK
(Using hand-held tester)
a. Connect the hand-held tester to DLC3
b. Check the control switch (MAIN, CANCEL, SET/COAST, RES/ACC)