Diagnostic system check - emergency call system controls (eCall unit)

  • If there is no malfunction in the system, do not perform these diagnostic steps unless otherwise instructed in other sections.
  • Check for related Service Bulletins before starting the diagnosis.
  • Do not clear the DTC unless instructed to do so in a diagnostic step.
  • The battery should be fully charged.
  • The battery cable should be normal and securely connected.
  • The ground of the eCall unit should be connected to the correct position.
  • The eCall unit harness connector should be clean and correctly connected.
  • The eCall unit terminals should be clean and correctly connected.
  • The vehicle information should be programmed correctly in the eCall unit.
  • The antenna connector should be securely connected to the eCall unit.
  • A radio wave of the GNSS satellite is blocked by placing an object on the antenna, etc.
  • A device that emits electromagnetic waves that interfere with the GNSS band, such as mobile devices and electrical appliances, should not be used in the vehicle.

1. Scan tool power-up check

1) Connect the scan tool.

2) Power up the scan tool. Does the scan tool power up?

Yes

=>Go to eCall unit communication verification.

No

Go to Scan tool does not power up.

Refer to "51.Engine Control 1A.Troubleshooting(RZ4E-TC) Scan tool does not power up".

2. eCall unit communication verification

1) Verify that communication can be established with the eCall unit. Can communication with the eCall unit be established?

Yes

=>Go to Current DTC check.

No

Go to Lost communication with the eCall unit.

Refer to "64.Body Control 10I.Troubleshooting(eCall unit) lost communication with the eCall unit".

3. Current DTC check

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.

4. 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.