DTC B1019 Passenger Deploy. Loop Short to Voltage. Pontiac Sun Runner - 4WD (Canada) 1998

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

### Circuit Description

When you first turn the ignition switch to the ON position, the inflatable restraint Sensing and Diagnostic Module (SDM) performs tests to diagnose critical malfunctions within itself. Upon passing these tests IGNITION 1, 23 VLR and deployment loop voltages are measured to make sure they are within their respective normal voltage ranges. The SDM monitors the voltages at the DRIVER SIDE LOW terminal 10 and PASSENGER SIDE LOW terminal 3 to detect shorts to B+ in the inflator module circuits. The service wait time is 10 minutes. Refer to Disabling the SIR System .

### Conditions for Setting the DTC

• | The voltage at DRIVER SIDE LOW terminal 10 is less than 3.5 volts.

• | The voltage at the PASSENGER SIDE LOW terminal 3 is more than 3.5 volts for 500 milliseconds.

The CONTINUOUS MONITORING test checks for this DTC. This test occurs when IGNITION 1 is within the normal operating range.

### Action Taken When the DTC Sets

• | The SDM sets DTC B1019 and also DTC B1071.

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

### Conditions for Clearing the DTC

DTC B1019 is a latched code. You cannot clear a latched code. Repair the malfunction that set this DTC before you replace the SDM.

### Diagnostic Aids

A short-to-B+ in the inflatable restraint (SIR) IP module circuit can cause an intermittent condition. A DTC B1019 would be accompanied by DTC B1071. Inspect the YEL/RED wire and the YEL wire carefully for cut or chafed wires. Wiring pigtail damage requires replacement of the inflatable restraint IP module. Be careful inspection of the circuits and components indicated on the DTC B1019 Table is essential in order to prevent damage to the replacement SDM.

The diagnostic table directs the technician to note the entry value of PASSENGER SENSELO. Comparing the value of the PASSENGER SENSELO can be helpful in determining if and intermittent condition exists.

When measurements are requested in this table, use J 39200 Digital Multimeter with the correct terminal adapter from J 35616 Connector Test Adapter Kit. When a check for proper connection is requested, refer to Intermittents and Poor Connections . When a wire, connector or terminal repair is requested, use J-38125 Terminal Repair Kit and refer to Wiring Repair in this section.

### Test Description

Numbers below refer to step numbers on the diagnostic table.

1. This test determines the PASSENGER SIDE LOW voltage measured by the inflatable restraint Sensing and Diagnostic Module (SDM).

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

3. This test determines whether the malfunction is in the YEL/RED wire.

4. This test determines whether the malfunction is in the YEL wire.

Notice: When DTC B1019 is set, it is necessary to replace the inflatable restraint Sensing and Diagnostic Module (SDM). Setting DTC B1019 also causes DTC B1071 to set. When a scan tool clear codes command is issued and the malfunction is no longer present, DTC B1019 and DTC B1071 will remain current. Ensure that the short to B+ condition is repaired prior to installing a replacement SDM in order to avoid damaging the SDM.

#### DTC B1019 Passenger Deploy. Loop Short To Voltage

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 LOCK position.
2. Connect a scan tool to the data link connector. Follow the directions in the instruction manual of the scan tool.
3. Turn the ignition switch to the ON position.
4. Request the SIR data list display.
5. Read the PASSENGER SIDE LOW voltage PASSENGER SENSLO. Record onto the repair order.

Did you read the PASSENGER SENSELO? Did you record PASSENGER SENSELO on the repair order?

--

Go to Step 3

--

3

1. Turn the ignition switch to the LOCK position.
2. Disconnect the inflatable restraint (SIR) steering wheel and inflatable restraint IP modules yellow connectors. These are located under the steering wheel side cap and behind the IP compartment.
3. Connect the J 38715-A to the inflatable restraint IP module harness connectors.
4. Turn the ignition switch to the ON position.
5. Using the scan tool, request the SIR data list display. Read the PASSENGER SIDE LOW voltage PASSENGER SENSELO.

Is the PASSENGER SENSELO more than the specified value?

3.5 V

Go to Step 5

Go to Step 4

4

1. Turn the ignition switch to the LOCK position.
2. Inspect the inflatable restraint IP module pigtail for damage. Verify that the pigtail and the nearby wiring are routed correctly.
3. Replace the inflatable restraint IP module. Refer to Inflatable Restraint Instrument Panel Module Replacement .

Did you replace the inflatable restraint IP module?

--

Go to Step 9

--

5

1. Turn the ignition switch to the LOCK position.
2. Disconnect the inflatable restraint Sensing Diagnostic Module (SDM).
3. Disconnect the J 38715-A .
4. Turn the ignition switch to the ON position.
5. Measure the voltage on the SDM harness connector from terminal 4 to terminal 6 (ground).

Is the measured voltage less than the specified value?

1 V

Go to Step 7

Go to Step 6

6

1. Turn the ignition switch to the LOCK position.
2. Repair a short to B+ condition in the YEL/RED wire.

Is the circuit repair complete?

--

Go to Step 9

--

7 | Measure the voltage on the SDM harness connector from terminal 3 to terminal 6 (ground). Is the measured voltage less than the specified value? | 1 V | Go to Integrity Check | Go to Step 8

8

1. Turn the ignition switch to the LOCK position.
2. Repair a short to B+ condition in the YEL wire.

Is the circuit repair complete?

--

Go to Step 9

--

9

1. Reconnect and confirm that all the SIR components are properly mounted.
2. Turn the ignition switch to RUN.
3. Verify that the PASSENGER SENSELO is less than the specified value.

Did you reconnect and properly mount all the SIR components?

3.5 V

Go to Step 10

--

10 | Clear the SIR diagnostic trouble codes. Have the SIR diagnostic trouble codes been cleared? | -- | Go to SIR Diagnostic System Check | --