Airbag System (for Hatchback without VSC) (from 07/2011)

SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM (for Hatchback without VSC): B181A/7A-B181D/7A: Short in Passenger Side Airbag Variable Vent Hole Squib Circuit
B181D/7A - Short to B+ in Passenger Side Airbag Variable Vent Hole Squib Circuit

DESCRIPTION

The variable vent hole squib circuit consists of the airbag sensor assembly and instrument panel passenger airbag assembly.

The airbag sensor assembly uses this circuit to deploy the airbag when deployment conditions are met.

These DTCs are stored when a malfunction is detected in the variable vent hole squib circuit.

WIRING DIAGRAM

INSPECTION PROCEDURE

HINT
* Perform the simulation method by selecting check mode (Signal Check) using the Techstream Check Mode Procedure (from 07/2011).
* After selecting check mode (Signal Check), perform the simulation method by wiggling each connector of the airbag system or driving the vehicle on a city or rough road How To Proceed With Troubleshooting.

PROCEDURE

1. CHECK CONNECTORS

(a) Turn the ignition switch off.

(b) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(c) Check that the connectors are properly connected to the instrument panel passenger airbag assembly and airbag sensor assembly. Also check that the connectors that link the instrument panel wire and No. 2 instrument panel wire are properly connected.

OK:

The connectors are properly connected.

HINT
If the connectors are not connected securely, reconnect the connectors and proceed to the next inspection.

(d) Disconnect the connectors from the instrument panel passenger airbag assembly and airbag sensor assembly. Also disconnect the instrument panel wire from the No. 2 instrument panel wire.

(e) Check that the terminals of the connectors are not damaged.

OK:

The terminals are not deformed or damaged.

(f) Check that the No. 2 instrument panel wire connector (on the instrument panel passenger airbag assembly side) is not damaged.

OK:

The lock button is not disengaged, or the claw of the lock is not deformed or damaged.

(g) Check that the short springs for the instrument panel wire and No. 2 instrument panel wire with the activation prevention mechanism are not deformed or damaged.

OK:

The short springs are not deformed or damaged.

Text in Illustration

NG -- REPLACE WIRE HARNESS
OK -- Continue to next step.

2. CHECK INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY (VARIABLE VENT HOLE SQUIB)

(a) Connect the instrument panel wire to the No. 2 instrument panel wire and airbag sensor assembly.

(b) Connect SST (resistance 2.1 Ohms) to connector E (green connector).

CAUTION:
Never connect the tester to the instrument panel passenger airbag assembly variable vent hole squib for measurement, as this may lead to a serious injury due to airbag deployment.

NOTICE:
* Do not forcibly insert SST into the terminals of the connector when connecting.
* Insert SST straight into the terminals of the connector.

SST : 09843-18061

(c) Connect the cable to the negative (-) battery terminal.

(d) Turn the ignition switch to ON, and wait for at least 60 seconds.

(e) Clear the DTCs stored in memory Airbag System (for Hatchback without VSC).

(f) Turn the ignition switch off.

(g) Turn the ignition switch to ON, and wait for at least 60 seconds.

(h) Check for DTCs Airbag System (for Hatchback without VSC).

OK:

DTC B181A/7A, B181B/7A, B181C/7A or B181D/7A is not output.

Text in Illustration

HINT
Codes other than DTCs B181A/7A, B181B/7A, B181C/7A and B181D/7A may be output at this time, but they are not related to this check.

(i) Turn the ignition switch off.

(j) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(k) Disconnect SST from connector E.

NG -- CHECK VARIABLE VENT HOLE CIRCUIT

OK -- REPLACE INSTRUMENT PANEL PASSENGER AIRBAG ASSEMBLY

3. CHECK VARIABLE VENT HOLE CIRCUIT

(a) Disconnect the instrument panel wire from the airbag sensor assembly.

(b) Check for a short to B+ in the circuit.

(1) Connect the cable to the negative (-) battery terminal.

(2) Turn the ignition switch to ON.

(3) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(c) Check for an open in the circuit.

(1) Turn the ignition switch off.

(2) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(3) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

(d) Check for a short to ground in the circuit.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

(e) Check for a short in the circuit.

(1) Release the activation prevention mechanism built into connector B Diagnosis System (from 07/2011).

(2) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

(f) Restore the released activation prevention mechanism of connector B to the original condition.

Text in Illustration

NG -- CHECK INSTRUMENT PANEL WIRE
OK -- Continue to next step.

4. CHECK DTC

(a) Connect the connectors to the instrument panel passenger airbag assembly and airbag sensor assembly.

(b) Connect the cable to the negative (-) battery terminal.

(c) Turn the ignition switch to ON, and wait for at least 60 seconds.

(d) Clear the DTCs stored in memory Airbag System (for Hatchback without VSC).

(e) Turn the ignition switch off.

(f) Turn the ignition switch to ON, and wait for at least 60 seconds.

(g) Check for DTCs Airbag System (for Hatchback without VSC).

OK:

DTC B181A/7A, B181B/7A, B181C/7A or B181D/7A is not output.

Text in Illustration

HINT
Codes other than DTCs B181A/7A, B181B/7A, B181C/7A and B181D/7A may be output at this time, but they are not related to this check.

NG -- REPLACE AIRBAG SENSOR ASSEMBLY Removal (from 07/2011)

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting

5. CHECK INSTRUMENT PANEL WIRE

(a) Disconnect the No. 2 instrument panel wire from the instrument panel wire.

(d) Check for a short to ground in the circuit.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Text in Illustration

(f) Restore the released activation prevention mechanism of connector B to the original condition.

NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.

6. CHECK NO. 2 INSTRUMENT PANEL WIRE

(a) Check for a short to B+ in the circuit.

(1) Connect the cable to the negative (-) battery terminal.

(2) Turn the ignition switch to ON.

(3) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

(b) Check for an open in the circuit.

(1) Turn the ignition switch off.

(2) Disconnect the cable from the negative (-) battery terminal.

CAUTION:
Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the SRS system.

(3) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

(c) Check for a short to ground in the circuit.

(1) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

(d) Check for a short in the circuit.

(1) Release the activation prevention mechanism built into connector D Diagnosis System (from 07/2011).

(2) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

(3) Restore the released activation prevention mechanism of connector D to the original condition.

Text in Illustration

NG -- REPLACE NO. 2 INSTRUMENT PANEL WIRE

OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting