Circuit Description
During the normal, non-deployment operation of the Supplemental Restraint System (SRS), a small amount of current flows through the driver deployment loop. The diagnostic resistors within the supplemental restraint arming sensor and the supplemental restraint discriminating sensors along with the resistance of the supplemental restraint steering wheel inflator module cause voltage drops within the deployment loop. The supplemental restraint Diagnostic Energy Reserve Module (DERM) monitors the voltage at the Driver Side Low terminal B8 to detect shorts or opens within the deployment loop. When the measured voltage is within a specified percentage of the Driver 36 VLR power supply for 500 milliseconds, DTC B1035 is set.
Conditions for Setting the DTC
During continuous monitoring, the voltage measured at the Driver Side Low terminal B8 is within a specified percentage of the Driver 36 VLR power supply voltage for 500 milliseconds.
Action Taken When the DTC Sets
The DERM turns on the AIR BAG warning lamp and sets a diagnostic trouble code.
Conditions for Clearing the DTC
The voltage measured at the Driver Side Low terminal B8 is above or below the percentage of the Driver 36 VLR power supply voltage which sets DTC B1035.
Diagnostic Aids
An intermittent condition may be caused by one of the following:
| • | An improper connection at any of the supplemental restraint discriminating sensor terminals |
| • | An open in one of the ground feeds to the supplemental restraint discriminating sensors |
| • | An open supplemental restraint discriminating sensor interconnect circuit |
| • | An increased resistance of one of the supplemental restraint discriminating sensors |
| • | A decreased resistance of the supplemental restraint arming sensor |
Test Description
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Start at the SRS Diagnostic System Check for all diagnosis.
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This test checks for increased resistance of the LH forward supplemental restraint discriminating sensor.
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This test checks for an open in the ground feed to the LH forward supplemental restraint discriminating sensor.
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This test locates the open in the ground feed to the LH forward supplemental restraint discriminating sensor.
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This test checks for increased resistance of the RH forward supplemental restraint discriminating sensor.
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This test checks for an open in the ground feed to the RH forward supplemental restraint discriminating sensor.
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This test locates the open in the ground feed to the RH forward supplemental restraint discriminating sensor.
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This test checks for an open in the supplemental restraint discriminating sensor interconnect circuit.
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This test checks for a malfunctioning supplemental restraint arming sensor.
When measurements are requested in this chart use J 39200 Digital Multimeter with correct terminal adapter from J 35616 Connector Test Adapter Kit. When a check for proper connection is requested, refer to Intermittents and Poor Connections in Section 8A4. When a wire, connector or terminal repair is requested, use J-38125 Terminal Repair Kit and refer to Wiring Repair.
Step | Action | Value | Yes | No |
|---|---|---|---|---|
Was the SRS Diagnostic System Check performed? | -- | |||
2 |
Is the LH forward supplemental restraint discriminating sensor electrical harness connector damaged or corroded? | -- | ||
3 | Repair the LH forward supplemental restraint discriminating sensor electrical harness connector. Has the connector been repaired? | -- | -- | |
4 | Check for proper connection to LH forward supplemental restraint discriminating sensor at the terminals A, B, and C. Are the LH forward supplemental restraint discriminating sensor terminals damaged or corroded? | -- | ||
5 | Check for proper connection to LH forward supplemental restraint discriminating sensor. Are the LH forward supplemental restraint discriminating sensor terminals damaged or corroded? | -- | ||
6 | Replace the LH forward supplemental restraint discriminating sensor. Refer to Supl Rst Front End Discriminating Sensor . Has the sensor been replaced? | -- | -- | |
Measure the resistance on the LH Forward Discriminating terminal B to C. Is the resistance more than the specified value? | 8.54 kohms | |||
Measure the resistance from the LH Forward Discriminating electrical harness connector terminal C to ground. Is the resistance less than the specified value? | 5 ohms | |||
9 |
Is the supplemental restraint discriminating sensor intermediate harness electrical connector damaged or corroded? | -- | ||
10 | Repair the supplemental restraint discriminating sensor intermediate harness electrical connector C109. Has the connector been repaired? | -- | -- | |
Measure the resistance of circuit 1751 from the LH forward supplemental restraint discriminating sensor harness electrical connector terminal C to the supplemental restraint discriminating sensor intermediate harness connector C109 terminal B. Is the resistance less than the specified value? | 5 ohms | |||
12 | Repair the open in circuit 1751 between C109 and S233. Has the open circuit been repaired? | -- | -- | |
13 | Repair the open in circuit 1751 between the supplemental restraint discriminating sensor intermediate harness connector C109. Has the open circuit been repaired? | -- | -- | |
14 |
Is the RH forward supplemental restraint discriminating sensor electrical harness connector damaged or corroded? | -- | ||
15 | Replace the RH Forward supplemental restraint arming sensor jumper harness electrical connector. Has the connector been replaced? | -- | -- | |
16 | Check for proper connection to the RH forward supplemental restraint discriminating sensor. Are the RH forward supplemental restraint discriminating sensor electrical harness connector damaged or corroded? | -- | ||
17 | Check for proper connection to the RH forward supplemental restraint discriminating sensor. Are the RH forward supplemental restraint discriminating sensor terminals damaged or corroded? | -- | ||
18 | Replace the RH forward supplemental restraint discriminating sensor. Refer to Supl Rst Front End Discriminating Sensor . Has the sensor been replaced? | -- | -- | |
Measure the resistance on the RH forward supplemental restraint discriminating sensor electrical connector from terminal A to terminal B. Is the resistance more than the specified value? | 8.54 kohms | |||
20 | Replace the RH forward supplemental restraint discriminating sensor. Refer to Supl Rst Front End Discriminating Sensor . Has the sensor been replaced? | -- | -- | |
Measure the resistance from the RH forward supplemental restraint discriminating sensor electrical harness connector terminal B to ground. Is the resistance less than the specified value? | 5 ohms | |||
22 |
Is the supplemental restraint discriminating sensor intermediate harness electrical connector damaged or corroded? | -- | ||
23 | Repair the supplemental restraint discriminating sensor intermediate harness electrical connector C109. Has the connector been repaired? | -- | -- | |
Measure the resistance of circuit 1751 from the RH forward supplemental restraint discriminating sensor electrical harness connector terminal B to the Discriminating Sensor intermediate harness electrical connector C109 terminal C. Is the resistance less than the specified value? | 5 ohms | |||
25 | Repair the open in circuit 1751 between C109 and S233. Has the open circuit been repaired? | -- | -- | |
26 | Repair the open in circuit 1751 in the supplemental restraint discriminating sensor intermediate harness electrical connector C109. Has the open circuit been repaired? | -- | -- | |
Measure the resistance of circuit 349 from the RH forward supplemental restraint discriminating sensor electrical harness connector terminal A to the LH forward supplemental restraint discriminating sensor electrical harness connector terminal B. Is the resistance less than the value specified? | 5 ohms | |||
28 | Repair the open in circuit 349. Has the open circuit been repaired? | -- | -- | |
Is the resistance less than the value specified? | 7.5 kohms | Go to Integrity Check | ||
30 | Replace the supplemental restraint arming sensor. Refer to Supl Rst Arming Sensor . Has the sensor been replaced? | -- | -- | |
31 |
Have all the SRS components been reconnected and properly mounted? | -- | -- | |
32 | Clear the SRS Diagnostic Trouble Codes. Have the SRS Diagnostic Trouble Codes been cleared? | -- | -- |
