Electrical Inputs
- Headlamp Battery Supplies 1 & 2
12 volt input on pins No. 1 and No. 2. Battery supply voltage for switching headlamp circuits only. - Module Battery Supply
12-volt input on pin No. 9. Battery supply voltage for all other FCM operations. - Power Ground
Ground source on pin No. 8 for all FCM operations. - Ignition Switch RUN Or START Position Status
12-volt input on pin No. 37. Allows the FCM to determine the ignition switch status for related FCM operations. - Ignition Switch START Only Status
12-volt input on pin No. 19. Allows the FCM to discriminate between RUN/START input and START for related FCM operations. - PCI Bus
Approximately 7.5-volt input on pin No. 22. Allows the FCM to communicate with other modules on the vehicle bus. - Stop Lamp Switch Status
12-volt input on pin No. 44. Provides for brake shift interlock function. - Horn Switch
Ground input on pin No. 17. Primary means for engaging the horn. - Back-Up Switch
Ground input on pin No. 39. Input is converted to a PCI Bus status message for use by other modules. - Wiper Park Switch
Ground input on pin No. 16. Used to determine park placement of wipers. Also used as feedback to FCM to determine correct operating mode of wipers. - Washer Fluid Level Switch
Ground input to pull-up on pin No. 18. Ground is switched into the circuit when washer bottle fluid level is low. - Brake Fluid Level Switch
Ground input to pull-up on pin No. 36. Ground is switched into the circuit when brake fluid level is low. - Ambient Temperature Sensor
Resistive input to pull-up on pin No. 25. Corresponding voltage level is converted to a PCI Bus message for use by other modules on the bus. - Right Park Lamp Outage
12-volt input on pin No. 21. Used to determine if right park lamp circuit is operating properly. - Left Park Lamp Outage
12-volt input on pin No. 41. Used to determine if left park lamp circuit is operating properly. - Battery IOD
12-volt input on pin No. 20. The FCM enters a low power consumption mode when the ignition is turned OFF. This low current draw battery supply keeps the microprocessor functioning in the low power mode. - Battery (+) Connection Detection
12-volt input on pin No. 38. The battery connection on the PDC incorporates the use of an internal switch to determine if the connector is properly mated and the Connector Positive Assurance (CPA) is engaged. If the CPA is not properly engaged, a voltage on pin No. 38 will be interpreted as an unseated connector and a fault will set. - Flash Programming Voltage
20-volt input on pin No. 42. When a DRBIII® is connected and the proper flash reprogramming sequence is selected, the 20-volt signal will be applied through pin No. 42.