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
B1352 if the measured resistance value of PAB circuit is more than the
threshold value.
The SRSCM sets DTC
B1353 if the measured resistance value of PAB circuit is less than the
threshold value.
*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
|
|
•
|
Poor connection of connected
part. |
•
|
Poor connection between shorting bar
and release pin. |
|
Enable Conditions
|
|
Threshold
Value
|
B1352
|
|
B1353
|
|
Diagnostic Time
|
Qualification
|
|
De-Qualification
|
|
Test Condition
|
Resistance
|
Ignition ON
|
1.6Ω ≤ PAB resistance ≤
4.7Ω
|

1. |
Ignition "OFF", connect
scantool. |
2. |
Ignition "ON"& Engine "OFF", select
"Diagnostic Trouble Codes(DTC)"
mode. |
3. |
Monitor diagnostic trouble code and present
of trouble code. |
4. |
Using a scantool, clear the
DTC.

|
5. |
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. |
Terminal and Connector
Inspection |
1. |
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. |
2. |
Thoroughly check shorting bar/shorting bar
release pin and connectors for looseness, poor connection, bending,
corrosion, contamination, deterioration, or
damage. |
3. |
Has a problem been found?

▶ Repair as necessary and then go to
"Verification of Vehicle Repair" procedure.

▶ Go to "Squib Circuit Inspection"
procedure. |
2. |
Disconnect (-) terminal cable from battery
and wait for 1 minutes or more. |
3. |
Remove the PAB module and connect the dummy
(0957A-38200) and dummy adapter (0957A-2E110) 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
. | |
4. |
Connect (-) terminal cable to battery and
Ignition "ON" & Engine "OFF" and wait for 30 seconds or
more. |
5. |
Connect scantool to Data Link Connector(DLC)
and clear DTC with scantool and diagnose again.

|
6. |
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. |
Main
harness Circuit Inspection
2. |
Disconnect the battery (-) terminal cable
from the battery and wait at least one
minutes. |
3. |
Disconncet PAB connector and SRSCM main
harness connctor.
Lay Removed PAB facing upward for
unexpected air bag
deploy. | |
4. |
Measure resistance between terminal "Low" or
"High" of the PAB harness connector.
Specification : approx. 1 Ω
below
|

|
5. |
Is the measured resistance 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. |
Verification of Vehicle
Repair |
Refer to the
DESCRIPTION in this TROUBLESHOOTING
section.