For 1990-2009 cars
SIR Components
2000 x130 SIR
Handling ESD Sensitive Parts Notice
SIR Handling Caution

### Circuit Description

When you first turn ON the ignition, the inflatable restraint sensing and diagnostic module (SDM) performs tests to diagnose critical malfunctions within itself. Then, the SDM performs the following continuous diagnostic tests on the deployment loops:

• | Deployment loop voltage out of range test

• | Deployment loop resistance measurement test

If the voltage out of range test detects a short to voltage condition, the resistance measurement test for that deployment loop will not be performed.

### Conditions for Running the DTC

• | Ignition voltage is within the normal operating voltage range.

• | Passenger frontal deployment loop is not open.

• | Passenger frontal deployment loop is not shorted to voltage.

• | Passenger frontal deployment loop is not shorted to ground.

### Conditions for Setting the DTC

Passenger frontal deployment loop resistance is less than 1.3 ohms for 300 milliseconds.

### Action Taken When the DTC Sets

The SDM commands ON the AIR BAG warning lamp via Class 2 serial data.

### Conditions for Clearing the DTC

• | The condition responsible for setting the DTC no longer exists, and the Scan Tool Clear DTCs function is used.

• | A history DTC will clear once 255 malfunction free ignition cycles have occurred.

### Diagnostic Aids

The following can cause an intermittent condition:

• | A short between the passenger frontal high and the passenger frontal low circuits.

• | A malfunctioning shorting bar on the inflatable restraint IP module 2-way connector.

• | Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

### Test Description

The number(s) below refer to the step number(s) on the diagnostic table.

1. This step checks the inflatable restraint IP module yellow 2-way connector.

2. This step determines if there is a short between the passenger frontal high and the passenger frontal low circuits or if there is a malfunctioning SDM.

#### DTC B0016 Passenger Frontal Deployment Loop Resistance Low

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

1. Turn OFF the ignition.
2. Disconnect the inflatable restraint IP module yellow 2-way connect. Refer to Inflatable Restraint Instrument Panel Module Replacement .
3. Inspect the component and harness sides of the inflatable restraint yellow 2-way connector for the following conditions:

• | Corrosion

• | Damaged terminals

Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Does either the component or harness side of the inflatable restraint IP module yellow 2-way connector exhibit any signs of corrosion or terminal damage?

--

Go to Step 3

Go to Step 4

3 |

1. If the component side of the inflatable restraint IP module yellow 2-way connector is damaged, the inflatable restraint IP module must be replaced.
2. If the harness side of the inflatable restraint IP module yellow 2-way connector is damaged, replace the connector. Refer to Connector Repairs in Wiring Systems.

Did you complete the repair?

--

Go to Step 10

--

4 |

1. Reconnect the inflatable restraint IP module yellow 2-way connector.
2. Verify that the connector position assurance (CPA) is properly installed.
3. Turn ON the ignition, with the engine OFF.
4. Use the scan tool to request the SIR DTC display.

Does the scan tool indicate that this DTC is current?

--

Go to Step 5

Go to Diagnostic Aids

5 |

1. Turn OFF the ignition.
2. Disconnect the inflatable restraint IP module yellow 2-way connector.
3. Install the J 38715-A to the harness side of the inflatable restraint IP module yellow 2-way connector.
4. Turn ON the ignition, with the engine OFF.
5. Use the scan tool to request the SIR DTC display.

Does the scan tool indicate that this DTC is current?

--

Go to Step 7

Go to Step 6

6 |

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

Did you complete the replacement?

--

Go to Step 10

--

7 |

1. Turn OFF the ignition.
2. Remove the J 38715-A .
3. Disconnect the inflatable restraint sensing and diagnostic module (SDM). Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement .
4. Use the J 39200 Digital Multimeter (DMM) to measure the resistance between the passenger frontal high circuit and the passenger frontal low circuit.

Does the resistance measure less than the specified value?

OL

Go to Step 8

Go to Step 9

8 | Locate and repair the short between the passenger frontal high and passenger frontal low circuits. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you complete the repair? | -- | Go to Step 10 | --
9 | Replace the SDM. Refer to Inflatable Restraint Sensing and Diagnostic Module Replacement . Did you complete the replacement? | -- | Go to Step 10 | --
10 |

1. Reconnect all SIR components.
2. Verify that all components and connectors are properly mounted.
3. Turn ON the ignition, with the engine OFF.
4. Use the scan tool in order to clear the DTCs.

Did you complete the action?

--

Go to Diagnostic System Check - SIR

--