In the RUN position, the ignition switch applies battery voltage to the AIR BAG warning lamp and to the IGNITION 1 input terminal 10. The inflatable restraint sensing and diagnostic module (SDM) responds by flashing the AIR BAG warning lamp 7 times. The inflatable restraint sensing and diagnostic module (SDM) monitors the voltage levels at the PASSENGER AIR BAG ENABLE terminal 11 and PASSENGER AIR BAG DISABLE terminal 12 of the inflatable restraint sensing and diagnostic module (SDM) to determine the position of the inflatable restraint IP module switch.
• | The voltage detected at PASSENGER AIR BAG ENABLE terminal 11 and PASSENGER AIR BAG DISABLE terminal 12 are less than 1.0 volt when the AIR BAG ON lamp is commanded on. |
• | The voltage detected at PASSENGER AIR BAG ENABLE terminal 11 and PASSENGER AIR BAG DISABLE terminal 12 are greater than 4.0 volts when the AIR BAG ON lamp is commanded OFF. |
• | The voltage detected at PASSENGER AIR BAG ENABLE terminal 11 and PASSENGER AIR BAG DISABLE terminal 12 are greater than 1.0 volt when the AIR BAG OFF lamp is commanded ON. |
• | The inflatable restraint sensing and diagnostic module (SDM) attempts to illuminate the AIR BAG OFF lamp. |
• | The inflatable restraint IP module switch is defaulted to the disabled state. |
• | The SDM sets a diagnostic trouble code. |
• | The SDM turns the AIR BAG warning lamp to the ON position. |
• | Current DTC: The voltage at PASSENGER AIR BAG ENABLE terminal 11 is greater than 4.0 volts for 500 milliseconds and the voltage at PASSENGER AIR BAG DISABLE terminal 12 is less than 1.0 volts for 500 milliseconds when the AIR BAG ON lamp is commanded ON. |
• | History DTC: |
- | You issue a scan tool CLEAR CODES command. |
- | After 250 malfunction free ignition cycles have occurred. |
Refer to AIR BAG Warning Lamp Comes On Steady and AIR BAG Warning Lamp Does Not Come On to diagnose warning lamp circuit malfunctions.
When measurements are requested in this table, use the J 39200 DMM with the correct terminal adapter from the J 35616 Connector Test Adapter Kit. When an inspection for proper connection is requested, refer to Testing for Electrical Intermittents in Wiring Systems. When a wire, connector or terminal repair is requested, use the J-38125 Terminal Repair Kit and refer to Wiring Repairs in Wiring Systems.
The numbers below refer to the step numbers on the diagnostic table:
This test determines if the AIR BAG ON lamp illuminates when the IP module switch is in the ON position.
This test inspects for a poor connection at the yellow 6-way IP module switch harness connector.
This test determines whether the malfunction is in CKT 1050.
This test determines whether the malfunction is in CKT 1139 between the fuse block and the IP module switch.
This test determines if the state of terminal 11 of the SDM (pass air bag enable) is correct when the IP module switch is in the ON position.
This test inspects for proper contact or corrosion of the SDM harness connector.
This test inspects for an open circuit in CKT 371.
This test inspects for a short to ground in CKT 371.
This test determines if the state of terminal 12 of the SDM (pass air bag disable) is correct when the IP module switch is in the ON position.
This test inspects for a short to voltage in CKT 353.
This test inspects for a short circuit between CKT 353 and 371.
This test determines if the AIR BAG OFF lamp illuminates when the IP module switch is in the OFF position.
This test inspects for a short to voltage in CKT 353.
This test inspects for a short to voltage in CKT 371.
This test inspects for an open circuit in CKT 353.
This test determines if the state of terminal 11 of the SDM (pass air bag enable) is correct when the IP module switch is in the OFF position.
This test determines if the state of terminal 12 of the SDM (pass air bag disable) is correct when the IP module switch is in the OFF position.
This test determines if the state of the internal SDM suppression lamp driver is correct when the IP module switch is in the OFF position.
This test inspects for a short to ground in CKT 353.
Step | Action | Value(s) | Yes | No |
---|---|---|---|---|
1 | Was the SIR Diagnostic System Check performed? | -- | Go to Step 2 | |
Does the AIR BAG ON lamp illuminate in the IP module switch? | -- | Go to Step 13 | Go to Step 3 | |
Is the yellow 6-way IP module switch harness connector properly connected to the IP module switch? | -- | Go to Step 5 | Go to Step 4 | |
4 | Connect the yellow 6-way IP module switch harness connector securely to the IP module switch. Is the yellow 6-way IP module switch harness connector securely connected to the IP module switch? | -- | -- | |
5 |
Are the terminals damaged or corroded? | -- | Go to Step 6 | Go to Step 7 |
6 | Repair the yellow 6-way IP module switch harness connector. Refer to Wiring Repair . Is the repair complete? | -- | Go to Step 52 | -- |
7 | Carefully inspect the IP module switch terminals for damage or corrosion. Are the terminals damaged or corroded? | -- | Go to Step 51 | Go to Step 8 |
Is the resistance reading greater than the specified values? | 5 ohms | Go to Step 9 | Go to Step 10 | |
9 | Repair a high resistance or open circuit in CKT 1050 between the yellow 6-way IP module switch harness connector terminal F to ground G203. Is the repair complete? | -- | Go to Step 52 | -- |
Is the voltage reading greater than the specified values? | 1 V | Go to Step 12 | Go to Step 11 | |
11 |
Is the repair complete? | -- | Go to Step 52 | -- |
12 |
Has the IP module switch been reconnected? | -- | Go to Step 13 | -- |
Does the pass air bag IP module show the specified level? | High | Go to Step 21 | Go to Step 14 | |
Is the SDM harness connector damaged or corroded? | -- | Go to Step 35 | Go to Step 15 | |
15 | Inspect for proper connection at terminals 11 and 12 on the SDM. Are the SDM terminals damaged or corroded? | -- | Go to Step 38 | Go to Step 16 |
Measure the resistance from the yellow 6-way IP module switch harness connector terminal A to terminal 11 on the SDM harness connector. Is the resistance reading greater than the specified values? | 5 ohms | Go to Step 17 | Go to Step 18 | |
17 | Repair a high resistance or open circuit condition in CKT 371. Is the repair complete? | -- | Go to Step 52 | -- |
Measure the resistance from the yellow 6-way IP module switch harness connector terminal A to terminal F to ground. Is the resistance reading less than the specified values? | OL | Go to Step 19 | Go to Step 20 | |
19 | Repair a short to ground condition in CKT 371. Is the repair complete? | -- | Go to Step 52 | -- |
20 |
Have the SIR components been reconnected? | -- | Go to Step 21 | -- |
Does the pass air bag disable show the specified level? | Low | Go to Step 28 | Go to Step 22 | |
22 |
Is the SDM harness connector damaged or corroded? | -- | Go to Step 35 | Go to Step 23 |
23 | Inspect for proper connection at terminals 11 and 12 on the SDM. Are the SDM terminals damaged or corroded? | -- | Go to Step 38 | Go to Step 24 |
Is the voltage reading greater than the specified values? | 1 V | Go to Step 25 | Go to Step 26 | |
25 |
Is the repair complete? | -- | Go to Step 52 | -- |
Is the resistance reading less than the specified values? | OL | Go to Step 27 | Go to Step 51 | |
27 | Repair a short circuit between CKT 353 and CKT 371. Is the repair complete? | -- | Go to Step 52 | -- |
Does the AIR BAG OFF lamp illuminate in the IP module switch? | -- | Go to Step 46 | Go to Step 29 | |
29 |
Is the yellow 6-way IP module switch harness connector properly connected to the IP module switch? | -- | Go to Step 31 | Go to Step 30 |
30 | Connect the yellow 6-way IP module switch harness connector securely to the IP module switch. Is the yellow 6-way IP module switch harness connector securely connected to the IP module switch? | -- | -- | |
31 |
Are the terminals damaged or corroded? | -- | Go to Step 32 | Go to Step 33 |
32 | Repair the yellow 6-way IP module switch harness connector. Refer to Wiring Repair . Is the repair complete? | -- | Go to Step 52 | -- |
33 | Carefully inspect the IP module switch terminals for damage or corrosion. Are the terminals damaged or corroded? | -- | Go to Step 51 | Go to Step 34 |
34 |
Is the SDM harness connector damaged or corroded? | -- | Go to Step 35 | Go to Step 37 |
35 | Replace the SDM harness connector. Refer to Wiring Repair . Has the SDM harness connector been replaced? | -- | Go to Step 36 | -- |
36 | Inspect for proper connection at terminals 11 and 12 on the SDM. Are the SDM terminals damaged or corroded? | -- | Go to Step 38 | Go to Step 52 |
37 | Inspect for proper connection at terminals 11 and 12 on the SDM. Are the SDM terminals damaged or corroded? | -- | Go to Step 38 | Go to Step 39 |
38 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Has the SDM been replaced? | -- | Go to Step 52 | -- |
Is the voltage reading greater than the specified values? | 1 V | Go to Step 40 | Go to Step 41 | |
40 |
Is the repair complete? | -- | Go to Step 52 | -- |
Measure the voltage from the yellow 6-way IP module switch harness connector terminal A to terminal F to ground. Is the voltage reading greater than the specified values? | 1 V | Go to Step 42 | Go to Step 43 | |
42 |
Is the repair complete? | -- | Go to Step 52 | -- |
Is the resistance reading greater than the specified values? | 5 ohms | Go to Step 44 | Go to Step 45 | |
44 | Repair a high resistance or open circuit condition in CKT 353. Is the repair complete? | -- | Go to Step 52 | -- |
45 |
Have the SIR system components been reconnected? | -- | Go to Step 46 | -- |
Does the pass air bag IP module show the specified level? | Low | Go to Step 47 | ||
Does the pass air bag disable show the specified level? | Low | Go to Step 48 | ||
Does the SUPPRESSION LAMP DRIVER show the specified level? | On | Go to Step 49 | ||
Is the resistance reading less then the specified values? | OL | Go to Step 50 | Go to Step 51 | |
50 | Repair a short to ground condition in CKT 353. Is the repair complete? | -- | Go to Step 52 | -- |
51 | Replace the inflatable restraint IP module switch. Refer to Inflatable Restraint Instrument Panel Module Disable Switch Replacement . Is the repair complete? | -- | Go to Step 52 | -- |
52 |
Have all of the SIR components been reconnected and properly mounted? | -- | Go to Step 53 | -- |
53 | Clear the SIR diagnostic trouble codes. Have all the SIR diagnostic trouble codes been cleared? | -- | -- |