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 HARNESS BETWEEN MFD AND COMBINATION METER ASSEMBLY .
1. Disconnect the connector of combination meter assembly.
2. Check the harness between MFD and combination meter assembly.
  Connector & terminal
  
  (i122) No. 8 - (i10) No. 11:
Is the resistance less than 10 Ω?

Yes : Go to 4.

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.