R035

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

During normal non-deployment operation of the SIR system, a small amount of current flows through both the Driver's and Passenger's Deployment Loops. The diagnostic resistors within the Dual Pole Arming sensor and the Discriminating sensors along with the resistance of the Inflator Modules cause voltage drops within the deployment loops. The DERM monitors the voltage at 'DRIVER'S SENSE LOW', terminal 'B8', and 'PASSENGER'S SENSE LOW', terminal 'B7' to detect shorts or opens within the deployment loops. When the measured voltage at either terminal is between 54% and 66% of its respective '36 VLR' power supply for 500 milliseconds, Code R035 is set. Code R035 indicates an open or high resistance in the discriminating sensor loop.

TEST CONDITION(S)

Tested every 100 milliseconds while 'Continuous Monitoring' tests active.

FAILURE CONDITION(S)

Voltage at the 'DRIVER'S SENSE LOW', terminal 'B8', or the 'PASSENGER'S SENSE LOW', terminal 'B7' is between 54% and 66% of its respective '36 VLR' terminal A4' or A3' for 500 milliseconds.

ACTION TAKEN

1. DERM turns on the 'INFLATABLE RESTRAINT' indicator.

2. 'SERVICE SUPPLEMENTAL INFLATABLE RESTRAINT' message is displayed on DIC.

NOTES ON FAULT TREE

1. Checking for a disconnected Forward Discriminating sensor or LH Discriminating sensor. A disconnected RH Discriminating sensor would not set this code.

2. Checking for an open inside the Forward Discriminating sensor.

3. Checking if the open is the wiring to the Forward Discriminating sensor.

4. Checking for an open inside the LII Discriminating sensor.

5. Checking for an open in CKT 349. If CKT 349 is OK, then open is in CKT 1003.

6. Checking for an open inside RH Discriminating sensor.

7. Checking CKT 1003 for an open from RH Discriminating sensor to ground.

8. Checking CKT 1003 for an open from LH Discriminating sensor to ground.

9. Check CKT 349 for an open between LH Discriminating sensor and RH Discriminating sensor.

10. Checking whether the fault is due to decreased resistance of the diagnostic resistors in the Dual Pole Arming sensor or a faulty DERM.