Dodge Ram Truck 1500-2500-3500. Manual — part 529

PASSENGER AIRBAG ON-OFF SWITCH OPEN

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

DR/DH

PASSENGER AIRBAG ON-OFF SWITCH OPEN (CONTINUED)

For the Air Bag System circuit diagram (Refer to 8 - ELECTRICAL/RESTRAINTS - SCHEMATICS AND DIA-
GRAMS).

For a complete wiring diagram Refer to Section 8W.

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When Monitored:
When the ignition is on, the (R106) Passenger Airbag MUX Switch Sense circuit supplies a 3 to 10 ms pulse
every 100 ms across the On or Off switch resistor to the (R104) Passenger Airbag MUX Switch Return circuit.

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Set Condition:
The code will set if the Occupant Restraint Controller (ORC) senses an open or high resistance on the (R106)
Passenger Airbag MUX Switch Sense circuit or (R104) Passenger Airbag MUX Switch Return circuit.

Possible Causes

PAB ON - OFF SWITCH DISCONNECTED

ORC IMPROPERLY CONFIGURED FOR PAB ON - OFF SWITCH

(R106) PAB MUX SWITCH SENSE CIRCUIT OPEN

(R104) PAB MUX SWITCH RETURN CIRCUIT OPEN

PAB ON - OFF SWITCH OPEN

ORC, PAB ON - OFF SWITCH CIRCUIT OPEN

Diagnostic Test

1.

DETERMINE ACTIVE OR STORED DTC

Turn the ignition on.

NOTE: Ensure that the battery is fully charged.

NOTE: For the purpose of this test, the AECM and ACM modules will be referred to as an ORC.

NOTE: When reconnecting Airbag system components, the ignition must be turned off and the battery must
be disconnected.

SELECT ACTIVE or STORED DTC:

ORC - ACTIVE DTC

Go To 2

ORC - STORED DTC

Go To 8

2.

CHECKING EQUIPMENT

Is this vehicle equipped with a Passenger Airbag On - Off Switch?

Yes

>> Go To 3

No

>> With the Scan TooI in MISCELLANEOUS re-configure the ORC for NO AIRBAG ON/OFF SWITCH.

Perform ORC VERIFICATION TEST - VER 1.

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

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PASSENGER AIRBAG ON-OFF SWITCH OPEN (CONTINUED)

3.

SWITCH DISCONNECTED

Turn the ignition off.

Gain access to the Passenger Airbag On - Off Switch connector.

Is the Passenger Airbag On - Off Switch connected to the dash harness?

Yes

>> Go To 4

No

>> Connect the Passenger Airbag On - Off switch to the dash harness connector.

Perform ORC VERIFICATION TEST - VER 1.

4.

PAB ON - OFF SWITCH OPEN

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BAT-
TERY AND WAIT TWO MINUTES BEFORE 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 the range specified for both switch positions?

Yes

>> Go To 5

No

>> Replace the Passenger Airbag ON - OFF Switch in accordance with the service information.

Perform ORC VERIFICATION TEST - VER 1.

5.

(R106) PAB MUX SWITCH SENSE CIRCUIT OPEN

Disconnect the Occupant Restraint Controller C1 connector.

NOTE: Check connectors - Clean and repair as necessary.

WARNING: IF THE OCCUPANT RESTRAINT CONTROLLER IS
DROPPED AT ANY TIME, IT MUST BE REPLACED. FAILURE TO
TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDEN-
TAL AIRBAG DEPLOYMENT AND PERSONAL INJURY OR DEATH.
Connect the appropriate Load Tool Adaptor to the Occupant Restraint
Controller connector.

Measure the resistance of the (R106) Passenger Airbag MUX Switch
Sense circuit between the ORC Adaptor and the PAB On - Off Switch
connector.

Is the resistance below 5.0 ohms?

Yes

>> Go To 6

No

>> Repair the (R106) Passenger Airbag MUX Switch Sense

circuit for an open.

Perform ORC VERIFICATION TEST - VER 1.

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

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PASSENGER AIRBAG ON-OFF SWITCH OPEN (CONTINUED)

6.

(R104) PAB MUX SWITCH RETURN CIRCUIT OPEN

Measure the resistance of the (R104) Passenger Airbag MUX Switch
Return circuit between the ORC Adaptor and the PAB On - Off Switch
connector.

Is the resistance below 5.0 ohms?

Yes

>> Go To 7

No

>> Repair the (R104) Passenger Airbag MUX Switch Return

circuit for an open.

Perform ORC VERIFICATION TEST - VER 1.

7.

ORC, PAB ON - OFF SWITCH CIRCUIT OPEN

WARNING: IF THE OCCUPANT RESTRAINT CONTROLLER IS DROPPED AT ANY TIME, IT MUST BE
REPLACED. FAILURE TO TAKE THE PROPER PRECAUTIONS COULD RESULT IN ACCIDENTAL AIRBAG
DEPLOYMENT AND PERSONAL INJURY OR DEATH.

If there are no possible causes remaining, view repair.

Repair:

Replace the Occupant Restraint Controller (ORC) in accordance with the Service Information.

Perform ORC VERIFICATION TEST - VER 1.

DR/DH

RESTRAINTS - ELECTRICAL DIAGNOSTICS

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