Short in Front Passenger Side Squib Circuit - Airbag System
SUPPLEMENTAL RESTRAINT SYSTEMS: AIRBAG SYSTEM: B1805/52-B1808/52: Short in Front Passenger Side Squib Circuit
B1808/52 - Short to B+ in Front Passenger Side Squib Circuit
DESCRIPTION
The front passenger side squib circuit consists of the center airbag sensor assembly and front passenger airbag assembly.
The circuit instructs SRS to deploy when deployment conditions are met.
These DTCs are stored when a malfunction is detected in the front passenger side squib circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
* Perform the simulation method by selecting check mode (Signal Check) using the Techstream Check Mode Procedure.
* 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 power 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 front passenger airbag assembly and center airbag sensor assembly. Also check that the connectors that link the instrument panel wire and No. 3 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 front passenger airbag assembly and center airbag sensor assembly. Also disconnect the instrument panel wire from the No. 3 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. 3 instrument panel wire connector (on the front 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. 3 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 FRONT PASSENGER AIRBAG ASSEMBLY (FRONT PASSENGER SIDE SQUIB)
(a) Connect the instrument panel wire to the No. 3 instrument panel wire and center airbag sensor assembly.
(b) Connect SST (resistance 2.1 Ohms) to connector E (orange connector).
CAUTION:
Never connect the tester to the front passenger airbag assembly (front passenger side 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 power switch on (IG), and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.
(f) Turn the power switch off.
(g) Turn the power switch on (IG), and wait for at least 60 seconds.
(h) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1805, B1806, B1807, B1808 or 52 is not output.
Text in Illustration
HINT
Codes other than DTCs B1805, B1806, B1807, B1808 and 52 may be output at this time, but they are not related to this check.
NG -- CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT
OK -- REPLACE FRONT PASSENGER AIRBAG ASSEMBLY Removal
3. CHECK FRONT PASSENGER SIDE SQUIB CIRCUIT
(a) Turn the power 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) Disconnect SST from connector E.
(d) Disconnect the instrument panel wire from the center airbag sensor assembly.
(e) Check for a short to B+ in the circuit.
(1) Connect the cable to the negative (-) battery terminal.
(2) Turn the power switch on (IG).
(3) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
(f) Check for an open in the circuit.
(1) Turn the power 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:
(g) Check for a short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(h) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector B Diagnosis System.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- CHECK INSTRUMENT PANEL WIRE
OK -- Continue to next step.
4. CHECK CENTER AIRBAG SENSOR ASSEMBLY
(a) Restore the released activation prevention mechanism of connector B to the original condition.
(b) Connect the connectors to the front passenger airbag assembly and center airbag sensor assembly.
(c) Connect the cable to the negative (-) battery terminal.
(d) Turn the power switch on (IG), and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.
(f) Turn the power switch off.
(g) Turn the power switch on (IG), and wait for at least 60 seconds.
(h) Check for DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1805, B1806, B1807, B1808 or 52 is not output.
Text in Illustration
HINT
Codes other than DTCs B1805, B1806, B1807, B1808 and 52 may be output at this time, but they are not related to this check.
NG -- REPLACE CENTER AIRBAG SENSOR ASSEMBLY Removal
OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting
5. CHECK INSTRUMENT PANEL WIRE
(a) Restore the released activation prevention mechanism of connector B to the original condition.
(b) Disconnect the No. 3 instrument panel wire from the instrument panel wire.
(c) Check for a short to B+ in the circuit.
(1) Connect the cable to the negative (-) battery terminal.
(2) Turn the power switch on (IG).
(3) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
(d) Check for an open in the circuit.
(1) Turn the power 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:
(e) Check for a short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(f) Check for a short in the circuit.
(1) Release the activation prevention mechanism built into connector B Diagnosis System.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPLACE INSTRUMENT PANEL WIRE
OK -- Continue to next step.
6. CHECK NO. 3 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 power switch on (IG).
(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 power 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.
(2) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
NG -- REPLACE NO. 3 INSTRUMENT PANEL WIRE
OK -- USE SIMULATION METHOD TO CHECK How To Proceed With Troubleshooting