4.
Using a scantool, clear the DTC.
Passenger Air bag module (hereinafter referred to PAB) located at passenger side crush pad protects passenger by reducing impact of collision. PAB is consist of air bag, pat cover and inflator. There are power,circuit for ignition, gas generator and diffuser screen in inflator. Air bag reduces impact of collision by fillied up gas. Inflator keeps gas and uses it to deploy air bag on collision.
Never measure resistance of PAB directly, Current of measuring device may cause unexpected air bag deploy.
The SRSCM sets DTC B1355 if there is a short to power in PAB harness.
*In this case, SRSCM checks if there's any fault in circuit by sending current for a while.
Item | Detecting Condition | Possible cause | |
DTC Strategy | ● Check Resistance | ● Short to ground in PAB harness. ● Poor connection of connected part. ● Faulty PAB. ● Faulty SRSCM. | |
Enable Conditions | ● Ignition "ON" | ||
Threshold Value | ● Rs ＜ 1㏀ | ||
Diagnostic Time | Qualification | ● More than 1 sec | |
De-Qualification | ● More than 2 sec | ||
Test Condition | Resistance |
Ignition ON | RS ＞10㏀ |
Ignition "OFF", connect scantool.
Ignition "ON"＆ Engine "OFF", select "Diagnostic Trouble Codes(DTC)" mode.
Monitor diagnostic trouble code and present of trouble code.
Using a scantool, clear the DTC.
Is DTC present problem ?
▶ Go to "W/Harness Inspection" procedure.
▶ Displaying nothing(no DTC) or DTC with label "H"(historical) shows that Fault is intermittent caused by poor contact in the part's and/or SRSCM connector or was repaired and SRSCM memory was not cleared.
Thoroughly check shorting bar/shorting bar release pin and connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
▶ Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
Many malfunctions in the electrical system are caused by poor harness and terminals.
Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check shorting bar/shorting bar release pin and connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage.
Has a problem been found?
▶ Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
▶ Go to "Squib Circuit Inspection" procedure.
Ignition "OFF".
Disconnect (-) terminal cable from battery and wait for 1 minutes or more.
Remove the PAB module and connect the dummy (0957A-38200) and dummy adapter (0957A-2G000) to PAB harness connector.
If dummy and dummy adaptor are not able to be prepared, use a known-good PAB or 2Ω resistor.
Lay Removed PAB facing upward for unexpected air bag deploy .
Connect (-) terminal cable to battery and Ignition "ON" ＆ Engine "OFF" and wait for 30 seconds or more.
Connect scantool to Data Link Connector(DLC) and clear DTC with scantool and diagnose again.
Is DTC present problem ?
▶ Go to "Main harness circuit inspection" procedure.
▶ Substitute a known-good PAB assembly, and check for proper operation.
If the problem is corrected, replace PAB and then go to "Verification of Vehicle Repair" procedure.
Ignition "OFF".
Disconnect the battery (-) terminal cable from the battery and wait at least one minutes.
Disconnect PAB connector and SRSCM main harness connector.
Lay Removed PAB facing upward for unexpected air bag deploy.
Connect the battery (-) terminal cable to the battery and ignition "ON" ＆ Engine "OFF".
Measure voltage between terminal "1" or "2" of the PAB harness connector and chassis ground.
Specification : approx. 0V
Is the measured voltage within specifications?
▶ Substitute a known-good SRSCM, and check for proper operation.
If the problem is corrected, replace SRSCM and then go to "Verification of Vehicle Repair" procedure.
▶ Substitute the SRS main harness and check for proper operation.
If the problem is corrected, replace SRS main harness and then go to "Verification of Vehicle Repair" procedure.
Refer to the DESCRIPTION in this TROUBLESHOOTING section.
