Dodge Ram Truck 1500-2500-3500. Manual — part 531

PASSENGER AIRBAG ON-OFF SWITCH SHORT TO BATTERY (CONTINUED)

6.

ORC, PAB ON - OFF SWITCH CIRCUIT SHORTED TO BATTERY

WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION OFF, DISCONNECT THE BAT-
TERY AND WAIT TWO MINUTES BEFORE PROCEEDING.

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.

7.

CHECKING STORED OR INTERMITTENT CODES

With the Scan Tool, 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 IGNITION OFF, DISCONNECT THE BAT-
TERY AND WAIT TWO MINUTES BEFORE 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 IGNITION ON, THEN RECONNECT THE
BATTERY.
With the Scan Tool, 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?

Yes

>> Select the appropriate diagnostic procedure from the Table of Contents in this section.

No

>> No problem found at this time. Erase all codes before returning vehicle to customer.

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

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PASSENGER AIRBAG ON-OFF SWITCH SHORT TO GROUND

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

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PASSENGER AIRBAG ON-OFF SWITCH SHORT TO GROUND (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.

•

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.

•

Set Condition:
The code will set if the Occupant Restraint Controller (ORC) senses low resistance on the (R106) Passenger
Airbag MUX Switch Sense circuit.

Possible Causes

ORC IMPROPERLY CONFIGURED FOR PAB ON - OFF SWITCH

(R106) PAB MUX SWITCH SENSE CIRCUIT SHORTED TO GROUND

PAB ON - OFF SWITCH SHORTED

ORC, PAB ON - OFF SWITCH CIRCUIT SHORTED TO GROUND

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 7

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 SHORT TO GROUND (CONTINUED)

3.

PAB ON - OFF SWITCH SHORTED

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 3.

Measure the PAB On - Off Switch resistance between terminals 2 and 3.

Is the resistance below 10K ohms on either test?

Yes

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

Perform ORC VERIFICATION TEST - VER 1.

No

>> Go To 4

4.

PAB ON - OFF SWITCH SHORTED

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 = 820.0 870.0 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 SHORTED TO GROUND

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 ground and the ORC Adaptor.

Is the resistance below 10K ohms?

Yes

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

circuit for a short to ground.

Perform ORC VERIFICATION TEST - VER 1.

No

>> Go To 6

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RESTRAINTS - ELECTRICAL DIAGNOSTICS

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