Supplemental Inflatable Restraint (SIR)

Code 32:

DERM Circuit Detail:

DESCRIPTION:

The voltage at the Sense Low input (terminal A6) is between 41% and 61% of 36VLR output voltage when 36VLR output of the DERM is charged. Should the circuit short to ground between the 36VLR output and the Arming Sensor, "IGNITION 1" voltage will be supplying the deployment loop. The voltage at the Sense Low input (terminal A6) will decrease due to the decrease in the supply voltage and Code 32 will set after 700 milliseconds. Code 32 indicates a short to ground in the wiring between the 36VLR output of the DERM and the Arming Sensor.

TEST CONDITION:

Tested every 100 milliseconds "Continuous Monitoring".

FAILURE CONDITIONS:

Code 32 will set if:
1. The voltage at the Sense Low input (terminal A6) is between 28% and 59% of Ignition 1 output voltage for 700 milliseconds.
2. Code 42 is set.

CONDITIONS TO CLEAR:

Current Code 32 will clear if the voltage at the Sense Low input (terminal A6) is between 41% and 61% of 36VLR output voltage for 500 milliseconds.

ACTION TAKEN:

DERM turns on the "INFLATABLE RESTRAINT" indicator lamp.

NOTES ON FAULT TREE:

1. Checks for a short to ground in the 36VLR circuit between the DERM and the Dual Sensor.