Check Clock System Communication Circuit

CHECK POWER SUPPLY .
1. Disconnect the MFD connector.
2. Turn the ignition switch to ON.
3. Measure the voltage between MFD connector and chassis ground.
  Connector & terminal
  
  (i122) No. 2 (+)-Chassis ground (-):
Is the voltage 10 V or more?

Yes: Go to 2.

No: Repair or replace the harness.
CHECK GROUND CIRCUIT .
Measure the resistance between MFD connector and chassis ground.

Connector & terminal

(i122) No. 3-Chassis ground:

Is the resistance less than 10 Ω?

Yes: Go to 3.

No: Repair or replace the harness.
CHECK MFD .
1. Remove the MFD.
2. Attach the clock to another vehicle on which the clock display operates normally, and check its operation.
Is MFD normal?

Yes: Repair the poor contact of connector.

No: Replace MFD.