Security Alarm Module (SAM) Outputs

SAM Outputs:

The Security Alarm Module (SAM) system has the following outputs:

C2D BUS- AND BUS+ (PINS #2 AND 4)
These circuits have approximately 2.5 volts on each wire. These circuits allow SAM to tell the PCM, it's OK TO START. The PCM monitors the C2D bus for messages from SAM every 2.5 seconds when the ignition is on. If the C2D bus fails while SAM is disarmed and the vehicle is running, the PCM "sees" the failure and will ignore the engine kill feature on start up. If the C2D bus fails while the vehicle is parked the engine kill feature will be active during the next arming condition, preventing the vehicle from starting. The C2D bus also allows the DRB II to communicate with SAM on the C2D bus system.

PARK AND TAIL LAMPS (PIN #14)
When the alarm is activated, this circuit sources up to 5 amps provided from pin #21 to the park and tail lamp circuits. The current is pulsed once every second, allowing the lamps to flash on and off. If pin #21 has no voltage present the module will not supply current to the lamps.

HORN RELAY (PIN # 12)
When the alarm is activated, this circuit source up to 1 amp to the horn relay. The current is pulsed once every two seconds, allowing the horn to be turned on with each pulse.

INDICATOR LAMP (PIN #9)
The indicator lamp is normally supplied with a 12 volt feed from the dome lamp fuse. The lamp can indicate several different conditions that exist in the SAM system:

^ Lamp pulsed on and off after arming
This is a normal indication, and represents that the system is arming.

^ Lamp comes on while driving
This condition indicates that the C2D bus has failed.

^ Lamp does not come on when arming
This condition could be caused by one of a number of items, such as: bad dome lamp fuse, bad indicator lamp, or an open or poor connection in the circuit, in the lamp circuit to the SAM module.

GROUND CIRCUITS (PINS #1 AND 17)
These circuits allow the module to complete an electrical path to the battery. If these circuits are open, the module will not function. The circuit should have less than 10 ohms of resistance to ground.