Jeep Wrangler TJ. Manual - part 13

TEST

ACTION

APPLICABILITY

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 problem found at this time. Erase all codes before returning

vehicle to customer.

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:

With the ignition 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

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

ACM - STORED DTC

Go To

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

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

All

Yes

→ Go To 3

→ 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.

AIRBAG

TEST

ACTION

APPLICABILITY

WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY 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 & 4 and 2 & 4.
Is the resistance below 10K ohms on either test?

All

Yes

→ Replace the Passenger Airbag ON - OFF Switch in accordance

with the service information.
Perform __AIRBAG VERIFICATION TEST - VER 1.

→ Go To 4

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

→ Replace the Passenger Airbag ON - OFF Switch in accordance

with the service information.
Perform __AIRBAG VERIFICATION TEST - VER 1.

WARNING: TURN IGNITION OFF, DISCONNECT THE BATTERY AND WAIT
TWO MINUTES BEFORE PROCEEDING.
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.
WARNING: TURN IGNITION ON, THEN RECONNECT THE BATTERY.
Measure the voltage on the PAB MUX Switch Sense and PAB MUX Switch Return
circuits at the PAB On - Off Switch connector.
Is there any voltage on either circuit?

All

Yes

→ Repair the Passenger Airbag MUX Switch circuits shorted to

battery.
Perform __AIRBAG VERIFICATION TEST - VER 1.

→ Go To 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.

AIRBAG

PASSENGER AIRBAG ON - OFF SWITCH SHORT TO BATTERY —

Continued

TEST

ACTION

APPLICABILITY

With the DRBIII

t, record and erase all DTC’s from all Airbag modules.

t monitor active codes as you work through the following steps.

All

Yes

→ Select appropriate symptom from Symptom List.

→ No problem found at this time. Erase all codes before returning

vehicle to customer.

AIRBAG

PASSENGER AIRBAG ON - OFF SWITCH SHORT TO BATTERY —

Continued

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