For 1990-2009 cars
SIR Components
SIR Schematics
Handling ESD Sensitive Parts Notice
SIR Caution
SIR Caution
Handling ESD Sensitive Parts Notice

### Circuit Description

When you first turn the ignition switch to the RUN position, the inflatable restraint Sensing and Diagnostic Module (SDM) performs tests to diagnose critical malfunctions within itself. Next the SDM measures IGNITION 1 voltage to make sure it is within its respective normal voltage range. Then the SDM proceeds with the DEPLOYMENT LOOP CONTINUITY test. During the DEPLOYMENT LOOP CONTINUITY test, the SDM measures the voltage difference between Passenger Frontal High and Passenger Frontal Low.

### Conditions for Setting the DTC

• | The voltage difference between Passenger Frontal High terminal 4 and Passenger Frontal Low terminal 3 is more than or equal to 480 millivolts.

• | The malfunction must be present for at least 500 milliseconds during one of the following tests:

- | DEPLOYMENT LOOP CONTINUITY

- | If the malfunction is detected in this test, the RESISTANCE MEASUREMENT test will not be performed.

- | CONTINUOUS MONITORING

### Action Taken When the DTC Sets

• | The SDM sets a Diagnostic Trouble Code.

• | The SDM turns ON the AIR BAG warning lamp.

### Conditions for Clearing the DTC

• | Current DTC

| The voltage difference between Passenger Frontal High terminal 4 and Passenger Frontal Low terminal 3 is less than 480 millivolts for 500 milliseconds.

• | History DTC

- | You issue a scan tool CLEAR CODES command.

- | Once 250 malfunction free ignition cycles have occurred.

### Diagnostic Aids

The following can cause an intermittent condition:

• | A poor connection at the inflatable restraint IP module harness connector terminals A and B.

• | A poor connection at the SDM terminals 3 and 4.

• | An open in CKT 1403.

• | An open in CKT 1404.

### Test Description

The numbers below refer to the step numbers on the diagnostic table:

1. This test determines the deployment loop voltage difference measured by the inflatable restraint Sensing and Diagnostic Module (SDM).

2. This test checks for proper contact or corrosion of the yellow 2-way connector.

3. This test isolates the malfunction to one side of the inflatable restraint IP module yellow 2-way connector.

4. This test checks for proper contact or corrosion of the SDM harness connector.

5. This test determines whether the malfunction is in CKT 1403.

6. This test determines whether the malfunction is in CKT 1404.

#### DTC B1017 Passenger Deployment Loop Open

Step | Action | Value(s) | Yes | No
--- | --- | --- | --- | ---
1 | Was the SIR Diagnostic System Check performed? | -- | Go to Step 2 | Go to SIR Diagnostic System Check
2 |

1. Turn the ignition switch to the OFF position.
2. Connect a scan tool to the DLC.
3. Turn the ignition switch to the RUN position.
4. Request the SIR data list display.
5. Read and record on the repair order the passenger deployment loop voltage difference PASSENGER FRONTAL VDIF.

Has the PASSENGER FRONTAL VDIF been read and recorded on the repair order?

--

Go to Step 3

--

3 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the inflatable restraint steering wheel and IP module yellow 2-way connectors near the base of the steering column and behind the RH insulator panel.
3. Check for proper connection at terminals A and B on the IP harness side of the inflatable restraint IP module yellow 2-way connector.

Are the terminals damaged or corroded?

--

Go to Step 4

Go to Step 6

4 | Replace the inflatable restraint IP module yellow 2-way IP harness connector. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 5 | --
5 | Check for proper connection at terminals A and B on the inflatable restraint IP module yellow 2-way connector. Are the terminals damaged or corroded? | -- | Go to Step 7 | Go to Step 21
6 | Check for proper connection at terminals A and B on the inflatable restraint IP module yellow 2-way connector. Are the terminals damaged or corroded? | -- | Go to Step 7 | Go to Step 8
7 | Replace the inflatable restraint IP module. Refer to Inflatable Restraint Instrument Panel Module Replacement . Are the repairs complete? | -- | Go to Step 21 | --
8 |

1. Connect the inflatable restraint steering wheel and IP module yellow 2-way connectors near the base of the steering column and behind the RH insulator panel.
2. Turn the ignition switch to the RUN position.
3. Using the scan tool, request the SIR data list display.
4. Read the passenger deployment loop voltage difference PASSENGER FRONTAL VDIF.

Is the PASSENGER FRONTAL VDIF less than the specified value?

480 mV

Go to Step 9

Go to Step 10

9 |

1. Turn the ignition switch to the OFF position.
2. Replace the inflatable restraint IP module yellow 2-way IP harness connector. Refer to Wiring Repair .

Are the repairs complete?

--

Go to Step 21

--

10 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the inflatable restraint steering wheel and IP module yellow 2-way connectors near the base of the steering column and behind the RH insulator panel.
3. Connect the J 38715-A SIR Driver/Passenger Load Tool to the harness connectors.
4. Turn the ignition switch to the RUN position.
5. Using the scan tool, request the data list display.
6. Read the passenger deployment loop voltage difference PASSENGER FRONTAL VDIF.

Is the PASSENGER FRONTAL VDIF less than the specified value?

480 mV

Go to Step 11

Go to Step 12

11 |

1. Turn the ignition switch to the OFF position.
2. Replace the inflatable restraint IP module. Refer to Inflatable Restraint Instrument Panel Module Replacement .

Are the repairs complete?

--

Go to Step 21

--

12 |

1. Turn the ignition switch to the OFF position.
2. Disconnect the inflatable restraint Sensing and Diagnostic Module (SDM).
3. Disconnect the J 38715-A .
4. Check for proper connection at terminals 3 and 4 on the SDM harness connector.

Is the connector damaged or corroded?

--

Go to Step 13

Go to Step 15

13 | Replace the SDM connector. Refer to Wiring Repair . Are the repairs complete? | -- | Go to Step 14 | --
14 | Check for proper connection at terminals 3 and 4 of the SDM. Are the terminals damaged or corroded? | -- | Go to Step 16 | Go to Step 21
15 | Check for proper connection at terminals 3 and 4 of the SDM. Are the terminals damaged or corroded? | -- | Go to Step 16 | Go to Step 17
16 | Replace the inflatable restraint Sensing and Diagnostic Module (SDM). Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Are the repairs complete? | -- | Go to Step 21 | --
17 |

1. Insert the J 42113 Shorting Bar Tool into the SDM harness connector terminal above terminals 3 and 4.
2. Zero the J 39200 Digital Multimeter.
3. Measure the resistance from the SDM harness connector terminal 3 to the inflatable restraint IP module yellow 2-way harness connector terminal A.

Is the resistance reading within the specified values?

0-0.5 ohms

Go to Step 19

Go to Step 18

18 | Repair the high resistance condition in CKT 1403. Are the repairs complete? | -- | Go to Step 21 | --
19 |

1. Zero the J 39200 .
2. Measure the resistance from the SDM harness connector terminal 4 to the inflatable restraint IP module yellow 2-way harness connector terminal B.

Is the resistance reading within the specified values?

0-0.5 ohms

Go to Integrity Check

Go to Step 20

20 | Repair the high resistance condition in CKT 1404. Are the repairs complete? | -- | Go to Step 21 | --
21 | Reconnect all the SIR system components, make sure all the components are properly mounted. Have all the SIR components been reconnected and properly mounted? | -- | Go to Step 22 | --
22 | Clear all the SIR DTCs. Have all the SIR DTCs been cleared? | -- | Go to SIR Diagnostic System Check | --