Diagnostic system check - central gateway controls (Central GateWay)

  • 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 central gateway control unit should be connected to the correct position.
  • The central gateway control unit harness connector should be clean and correctly connected.
  • The central gateway control unit terminal should be clean and correctly connected.
  • Vehicle information should be programmed correctly in the central gateway control unit.

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 Central gateway 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".

2. Central gateway control unit communication verification

1) Turn ON the ignition switch.

2) Verify that communication can be established with the central gateway control unit using a scan tool. Can communication with the central gateway control unit be established?

Yes

=>Go to Current DTC check.

No

Go to Lost communication with the central gateway control unit.

Refer to "64.Body Control 10I.Troubleshooting(Central GateWay) lost communication with the central gateway control 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.

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