R015

Diagnostic Chart:

Wiring Diagram:

CIRCUIT DESCRIPTION

During the 'Initiator Circuit Resistance' tests, the DERM grounds the 'DRIVER'S SENSE LOW', terminal 'B8', and turns 'ON' the passenger's current source at 'PASSENGER'S SENSE HIGH', terminal A?', and injects a 150 milliamp current for 50 milliseconds into the circuit. During this test the DERM monitors the voltage at 'PASSENGER'S SENSE LOW' and 'PASSENGER'S SENSE HIGH'. The voltage difference between 'PASSENGER'S SENSE HIGH' and 'PASSENGER'S SENSE LOW' is used to calculate the resistance of the passenger's initiator loop. When the resistance is above a given value, Code R015 is set.


TEST CONDITION(S)

Tested once each ignition cycle during 'Initiator Circuit Resistance' tests if:

1. No faults are detected during 'Turn-On';

2. No faults are detected during 'Continuous Monitoring' for 1 second;

3. No 'CRANK' signal present at DERM;

4. Ignition 1 voltage is greater than 7.25 volts at DERM.

FAILURE CONDITION(S)

Combined resistance of the Passenger's Inflator Module, harness wiring and connector terminal contacts is greater than a specified value.

ACTION TAKEN

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

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

3. Code R015 remains set for the entire ignition cycle.

4. Current Code R015 clears each time the ignition switch is cycled from 'ON' to 'OFF'.

NOTES ON FAULT TREE

1. Determines if fault is in the Passenger's Inflator Module or the wiring harness. The SIR Load Tool J 38715 simulates the proper resistance of a passenger's inflator module.

2. Checks for an open in the 'PASSENGER'S SENSE HIGH' circuit between the DERM and the Passenger Inflator Module connector or a faulty DERM.