DTC 34

Electrical Diagram:

CIRCUIT DESCRIPTION
At "Turn-ON" the DERM monitors the voltage at the "Sense Low" input, terminal "A6," for 500 milliseconds. The DERM expects the voltage to be between 28% and 59% of "Ignition 1" voltage before the "36VLR" output is charged. If the "Ignition 1" circuit from the splice to the arming sensor is open, the voltage at the "Sense Low" input, terminal "A6," will be less than 28% of "Ignition 1" voltage and Code 34 will set.

TEST CONDITION(S)
Test once during each ignition cycle at "Turn-ON".

FAILURE CONDITION(S)
Code 34 will set if the voltage at the "Sense Low" input, terminal "A6," is less than 28% of "Ignition 1" voltage for 300 milliseconds and "36VLR" is less than "ignition 1" output voltage at "Turn-ON".

ACTION TAKEN
DERM turns ON the "INFL REST" warning lamp.

CONDITIONS TO CLEAR
To clear Code 34, the ignition must be "OFF" long enough to assure the "36VLR" supply voltage has fully discharged (10 minutes). Once the "36VLR" is discharged, the DERM will again check the failure conditions upon ignition "ON." If the failure conditions are not present (no failure indicated) then, and only then, will current Code 34 be cleared.

TEST DESCRIPTION
Number(s) below refer to circled number(s) on the diagnostic chart.
1. This test checks whether "Ignition 1" voltage is available at the arming sensor harness connector.
2. This test checks if voltage is available at harness connector terminal "C" (CKT 347).
3. This test checks for an open in CKT 347A.
4. This test determines whether the fault causing voltage loss is attributed to the wiring harness or to the arming sensor.