1) Turn ON the ignition switch.
2) Check the parking aid system OFF indicator light. Does the parking aid system OFF indicator light turn OFF after illuminating for approximately 3 seconds?
Yes
=>Go to Scan tool power-up check.
No
Go to Parking aid system OFF indicator light illuminating circuit system check.
1) Connect the scan tool.
2) Power up the scan tool. Does the scan tool power up?
Yes (Models with radar sensors/stereo cameras)
=>Go to Central gateway control unit communication verification.
Yes (Models without radar sensors and stereo cameras)
=>Go to Parking aid system control unit communication verification.
No
Go to Scan tool does not power up.
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 with DPD) Scan tool does not power up".
Refer to "51.Engine Control 1A.Troubleshooting(4JJ3 without DPD) Scan tool does not power up".
Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) Scan tool does not power up".
1) Verify communication with the central gateway control unit using the scan tool. Can communication with the central gateway control unit be established?
Yes
=>Go to Parking aid system control unit communication verification.
No
Go to Lost communication with the central gateway control unit.
=>Go to Parking aid system control unit communication verification.
1) Verify that communication can be established with the parking aid system control unit. Can communication with the parking aid system control unit be established?
Yes
No (Models with radar sensors/stereo cameras)
Go to Lost communication with the parking aid system control unit.
No (Models without radar sensors and stereo cameras)
Go to Lost communication with the parking aid system control unit.
1) Observe the DTC information with a scan tool. Is a DTC set?
Yes
Go to the applicable DTC diagnosis.
No
=>Go to Other system DTC check.
1) Observe the DTC information for other systems with a scan tool. Is a DTC set?
Yes
Go to the applicable DTC diagnosis.
No
The system is normal.