Pinpoint Tests

Clock

Pinpoint Tests

Pinpoint Test A: The Clock Operation Is Erratic/Inoperative

Refer to Wiring Diagram Set 44, Horn/Cigar Lighter for schematic and connector information. Diagrams By Number

Normal Operation

The Battery Junction Box (BJB) supplies voltage to the Smart Junction Box (SJB) through circuit SBB01 (YE/RD). The clock receives voltage from the SJB through circuit SBP07 (WH/RD). Ground for the clock is supplied through circuit GD116 (BK/VT).

This pinpoint test is intended to diagnose the following:

- Fuse
- Wiring, terminals or connectors
- Clock



PINPOINT TEST A: THE CLOCK OPERATION IS ERRATIC/INOPERATIVE

NOTICE: Use the correct probe adaptor(s) when making measurements. Failure to use the correct probe adaptor(s) may damage the connector.

NOTE: Failure to disconnect the battery when instructed will result in false resistance readings. Refer to Battery.

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A1 CHECK CIRCUIT SBP07 (WH/RD) FOR AN OPEN


- Ignition OFF.
- Disconnect: Clock C2016.
- Measure the voltage between the clock C2016-6, circuit SBP07 (WH/RD), harness side and ground.




- Is the voltage greater than 10 volts?

Yes
GO to A2.

No
VERIFY that the SJB fuse 13 (7.5A) is OK. If OK, REPAIR the circuit. TEST the system for normal operation. If not OK, REFER to the Wiring Diagrams to identify the possible causes of the circuit short.

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A2 CHECK CIRCUIT GD116 (BK/VT) FOR AN OPEN


- Disconnect: Negative Battery Cable.
- Measure the resistance between the clock C2016-5, circuit GD116 (BK/VT), harness side and ground.




- Is the resistance less than 5 ohms?

Yes
INSTALL a new clock. REFER to Clock - Fusion, Milan Service and Repair or Clock - MKZ . TEST the system for normal operation.

No
REPAIR the circuit. TEST the system for normal operation.

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