B1908
SUPPLEMENTAL RESTRAINT SYSTEM: AIRBAG SYSTEM: B1905/74-B1908/74: Short in Front Passenger Side Pretensioner Squib Circuit
B1908/74 - Short to B+ in Front Passenger Side Front Pretensioner Squib Circuit
DESCRIPTION
The front passenger side front pretensioner squib circuit consists of the center airbag sensor assembly and the front seat outer belt assembly RH.
This circuit signals the SRS to deploy when deployment conditions are met.
These DTCs are recorded when a malfunction is detected in the front passenger side front pretensioner squib circuit.
WIRING DIAGRAM
INSPECTION PROCEDURE
HINT
* Perform the simulation method by selecting "check mode" (signal check) with 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 Diagnosis System.
PROCEDURE
1. CHECK CONNECTOR (NO.1 REAR DOOR WIRE - FRONT SEAT OUTER BELT ASSEMBLY RH)
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the No. 1 rear door wire connector from the front seat outer belt assembly RH.
(d) Check the No. 1 rear door wire connector and terminals (on the front seat outer belt assembly RH side) and check that the connector is properly connected to the front seat outer belt assembly RH.
Result:
C -- CONNECT CONNECTOR PROPERLY
B -- REPLACE NO. 1 REAR DOOR WIRE
A -- Continue to next step.
2. CHECK FRONT SEAT OUTER BELT ASSEMBLY RH (FRONT PRETENSIONER SQUIB RH)
(a) Disconnect the connectors from the front seat outer belt assembly RH.
(b) Connect the black wire side of SST (resistance 2.1 Ohms) to connector E.
CAUTION:
Never connect a tester to the front seat outer belt assembly RH (front pretensioner squib RH) for measurement, as this may lead to a serious injury due to airbag deployment.
NOTICE:
* Do not forcibly insert the SST into the terminals of the connector when connecting.
* Insert the SST straight into the terminals of the connector.
SST : 09843-18061
(c) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.
(f) Turn the ignition switch off.
(g) Turn the ignition switch to ON, and wait for at least 60 seconds.
(h) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1905/74, B1906/74, B1907/74 and B1908/74 are not output.
HINT
DTCs other than DTC B1905/74, B1906/74, B1907/74 and B1908/74 may be output at this time, but they are not related to this check.
NG -- CHECK CONNECTOR (FLOOR WIRE - NO. 1 REAR DOOR WIRE)
OK -- REPLACE FRONT SEAT OUTER BELT ASSEMBLY RH Removal
3. CHECK CONNECTOR (FLOOR WIRE - NO. 1 REAR DOOR WIRE)
(a) Turn the ignition switch off.
(b) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(c) Disconnect the SST from connector E.
(d) Check the floor wire connector and terminals (on the No. 1 rear door wire side) and check that the connector is properly connected to the No. 1 rear door wire.
Result:
C -- CONNECT CONNECTOR PROPERLY
B -- REPLACE FLOOR WIRE
A -- Continue to next step.
4. CHECK FRONT PRETENSIONER SQUIB RH CIRCUIT
(a) Disconnect the connector from the center airbag sensor assembly.
(b) Check for short to B+ in the circuit.
(1) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(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 open in the circuit.
(1) Turn the ignition switch off.
(2) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(d) Check for short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(e) Check for 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:
(3) Restore the released activation prevention mechanism of connector B to the original condition.
NG -- CHECK CONNECTOR (FLOOR WIRE - CENTER AIRBAG SENSOR ASSEMBLY)
OK -- Continue to next step.
5. CHECK CENTER AIRBAG SENSOR ASSEMBLY
(a) Connect the floor wire connector to the No.1 rear door wire.
(b) Connect the connectors to the front seat outer belt assembly RH and the center airbag sensor assembly.
(c) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(d) Turn the ignition switch to ON, and wait for at least 60 seconds.
(e) Clear the DTCs stored in the memory Reading and Clearing Diagnostic Trouble Codes.
(f) Turn the ignition switch off.
(g) Turn the ignition switch on, and wait for at least 60 seconds.
(h) Check the DTCs Reading and Clearing Diagnostic Trouble Codes.
OK:
DTC B1905/74, B1906/74, B1907/74 and B1908/74 are not output.
HINT
DTCs other than DTC B1905/74, B1906/74, B1907/74 and B1908/74 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 Diagnosis System
6. CHECK CONNECTOR (FLOOR WIRE - CENTER AIRBAG SENSOR ASSEMBLY)
(a) Disconnect the floor wire connector from the center airbag sensor assembly.
(b) Check the floor wire connector and terminals (on the center airbag sensor assembly side) and check that the connector is properly connected to the center airbag sensor assembly.
Result:
C -- CONNECT CONNECTOR PROPERLY
B -- REPLACE FLOOR WIRE
A -- Continue to next step.
7. CHECK FLOOR WIRE
(a) Disconnect the floor wire connector from the No. 1 rear door wire.
(b) Check for short to B+ in the circuit.
(1) Connect the negative (-) terminal cable to the battery, and wait for at least 2 seconds.
(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 open in the circuit.
(1) Turn the ignition switch off.
(2) Disconnect the negative (-) terminal cable from the battery, and wait for at least 90 seconds.
(3) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(d) Check for short to ground in the circuit.
(1) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
(e) Check for 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:
(3) Restore the released activation prevention mechanism of connector D to the original condition.
NG -- REPLACE FLOOR WIRE
OK -- REPLACE NO. 1 REAR DOOR WIRE