Dodge Ram. Manual — part 29
Symptom:
PASSENGER AIRBAG ON-OFF SWITCH OPEN
When Monitored and Set Condition:
PASSENGER AIRBAG ON-OFF SWITCH OPEN
When Monitored:
When the ignition is on, the PAB MUX Switch Sense circuit supplies a
3 to 10 ms pulse every 100 ms across the On or Off switch resistor to the MUX Switch
Return circuit.
Set Condition:
The code will set if the ACM senses an open or high resistance on the PAB
MUX Switch Sense circuit or PAB MUX Switch Return circuit.
POSSIBLE CAUSES
CHECKING EQUIPMENT
SWITCH DISCONNECTED
PAB ON - OFF SWITCH OPEN
PASSENGER AIRBAG MUX SWITCH CIRCUIT OPEN
ACM, PASSENGER ON - OFF SWITCH CIRCUIT OPEN
STORED CODE OR INTERMITTENT CONDITION
ACTIVE CODE PRESENT
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
NOTE: Ensure that the battery is fully charged.
NOTE: For the purpose of this test, the AECM and ORC modules will be
referred to as an ACM.
SELECT ACTIVE or STORED DTC:
All
ACM - ACTIVE DTC
Go To
2
ACM - STORED DTC
Go To
7
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
2
Is this vehicle equipped with a Passenger Airbag On - Off Switch?
All
Yes
→ Go To 3
No
→ With the DRBIIIt in MISCELLANEOUS, read the Configure for
Airbag ON - OFF Switch current status. Enter the number 1 and
press enter to re configure the ACM for NO AIRBAG ON/OFF
SWITCH.
Perform __AIRBAG VERIFICATION TEST - VER 1.
113
AIRBAG
TEST
ACTION
APPLICABILITY
3
Gain access to the Passenger Airbag On - Off Switch connector.
Is the Passenger Airbag On - Off Switch connected to the dash harness?
All
Yes
→ Go To 4
No
→ Connect the Passenger Airbag On - Off switch to the dash harness
connector.
Perform __AIRBAG VERIFICATION TEST - VER 1.
4
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Disconnect the Passenger Airbag On - Off Switch.
NOTE: Check connectors - Clean and repair as necessary.
Measure the PAB On - Off Switch resistance between terminals 1 and 2 in both
switch positions.
The switch resistance specifications are: ON position = 175.0 to 190.0 ohms and OFF
position = 820.0 to 870.0 ohms.
Is the resistance within range for both switch positions?
All
Yes
→ Go To 5
No
→ Replace the Passenger Airbag ON - OFF Switch in accordance
with the service information.
Perform __AIRBAG VERIFICATION TEST - VER 1.
5
Disconnect the Airbag Control Module connector(s).
NOTE: Check connectors - Clean and repair as necessary.
WARNING: IF THE AIRBAG CONTROL MODULE IS DROPPED AT ANY
TIME, IT MUST BE REPLACED.
Connect the appropriate Load Tool Adaptor to the Airbag Control Module connector.
Measure the resistance of the PAB MUX Switch Sense between the ACM Adaptor and
the PAB On - Off Switch connector.
Measure the resistance of the PAB MUX Switch Return circuit between the ACM
Adaptor and the PAB On - Off Switch connector.
Is the resistance below 5.0 ohms on both circuits?
All
Yes
→ Go To 6
No
→ Repair the open Passenger Airbag MUX Switch circuit(s).
Perform __AIRBAG VERIFICATION TEST - VER 1.
6
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
WARNING: IF THE AIRBAG CONTROL MODULE IS DROPPED AT ANY
TIME, IT MUST BE REPLACED. FAILURE TO TAKE THE PROPER PRE-
CAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG DEPLOYMENT
AND PERSONAL INJURY OR DEATH.
If there are no possible causes remaining, view repair.
All
Repair:
Replace the Airbag Control Module in accordance with Service
Instructions.
Perform __AIRBAG VERIFICATION TEST - VER 1.
114
AIRBAG
PASSENGER AIRBAG ON-OFF SWITCH OPEN —
Continued
TEST
ACTION
APPLICABILITY
7
With the DRBIII
t, record and erase all DTC’s from all Airbag modules.
If equipped with Passenger Airbag On - Off switch, read the DTC’s in all switch
positions.
If any ACTIVE codes are present they must be resolved before diagnosing any stored
codes.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Look for chaffed, pierced, pinched, or partially broken wires and broken, bent, pushed
out, spread, corroded, or contaminated terminals.
The following additional checks may assist you in identifying a possible intermittent
problem.
Reconnect any disconnected components and harness connector.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION ON, THEN RECONNECT THE BATTERY.
With the DRBIII
t monitor active codes as you work through the following steps.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, MAINTAIN A SAFE
DISTANCE FROM ALL AIRBAGS WHILE PERFORMING THE FOLLOWING
STEPS.
Wiggle the wiring harness and connectors of the related airbag circuit or component.
If codes are related to the Driver Airbag circuits, rotate the steering wheel from stop
to stop.
IF only stored codes return continue the test until the problem area has been isolated
In the previous steps you have attempted to recreate the conditions responsible for
setting active DTC in question.
Are any ACTIVE DTCs present?
All
Yes
→ Select appropriate symptom from Symptom List.
No
→ No problem found at this time. Erase all codes before returning
vehicle to customer.
115
AIRBAG
PASSENGER AIRBAG ON-OFF SWITCH OPEN —
Continued
Symptom:
PASSENGER AIRBAG ON-OFF SWITCH SHORT TO BATTERY
When Monitored and Set Condition:
PASSENGER AIRBAG ON-OFF SWITCH SHORT TO BATTERY
When Monitored:
When the ignition is on, the MUX Switch Sense circuit supplies a 3 to
10 ms pulse every 100 ms across the switch resister to the MUX switch return circuit. Once
the code is active, the ACM will disable the indicator for the duration of the ignition cycle.
Set Condition:
The code will set if the ACM senses constant voltage over approximately
4.0 volts on the PAB MUX Switch circuits.
POSSIBLE CAUSES
CHECKING EQUIPMENT
PAB ON - OFF SWITCH CIRCUIT SHORT
PAB ON - OFF SWITCH SHORT
PAB MUX SWITCH CIRCUIT SHORT TO BATTERY
ACM, PAB ON - OFF SWITCH CIRCUIT SHORT
STORED CODE OR INTERMITTENT CONDITION
ACTIVE CODE PRESENT
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
NOTE: Ensure that the battery is fully charged.
NOTE: For the purpose of this test, the AECM and ORC modules will be
referred to as an ACM.
SELECT ACTIVE or STORED DTC:
All
ACM - ACTIVE DTC
Go To
2
ACM - STORED DTC
Go To
7
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
2
Is this vehicle equipped with a Passenger Airbag On - Off Switch?
All
Yes
→ Go To 3
No
→ With the DRBIIIt in MISCELLANEOUS, read the Configure for
Airbag ON - OFF Switch current status. Enter the number 1 and
press enter to re configure the ACM for NO AIRBAG ON/OFF
SWITCH.
Perform __AIRBAG VERIFICATION TEST - VER 1.
116
AIRBAG
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