Pinpoint Test A: The Clock Is Inoperative
NOTE:
Use the correct probe adapter(s) when making measurements. Failure to use the correct probe adapter(s) may damage the connector.
- A1 CHECK FOR VOLTAGE TO THE CLOCK
- Ignition OFF.
- Disconnect: Clock C2016.
- Measure the voltage between the clock C2016-6, circuit SBP14 (BN/RD), harness side and ground.
- Is the voltage greater than 10 volts?
- Yes: Go to A2 .
- No: VERIFY the SJB fuse 14 (10A) is OK. If OK, go to A3. TEST the system for normal operation. If not OK, refer to the appropriate SYSTEM WIRING DIAGRAMS article to identify the possible causes of the circuit short.
- A2 CHECK FOR VOLTAGE TO THE CLOCK USING THE CONNECTOR
- Measure the voltage between the clock C2016-6, circuit SBP14 (BN/RD), harness side and the clock C2016-5, circuit GD150 (BK/WH), harness side.
- Is the voltage greater than 10 volts?
- YES: INSTALL a new clock. Refer to CLOCK in this Information. TEST the system for normal operation.
- No: REPAIR circuit GD150 (BK/WH) for an open. TEST the system for normal operation.
- A3 CHECK THE CLOCK VOLTAGE CIRCUIT FOR AN OPEN
- Disconnect: SJB C2280b.
- Measure the resistance between the SJB C2280b-4, circuit SBP14 (BN/RD), harness side and the clock C2016-6, circuit SBP14 (BN/RD), harness side.
- Is the resistance less than 5 ohms?
- Yes: Go to A4 .
- No: REPAIR circuit SBP14 (BN/RD) for an open. TEST the system for normal operation.
- A4 CHECK FOR CORRECT SJB OPERATION
- Disconnect all the SJB connectors.
- Check for:
- corrosion
- damaged pins
- pushed-out pins
- Connect all the SJB connectors and make sure they seat correctly.
- Operate the system and verify the concern is still present.
- Is the concern still present?
- Yes: INSTALL a new SJB . Refer to MULTIFUNCTION ELECTRONIC MODULE . TEST the system for normal operation.
- No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector.