Mercedes-Benz Sprinter / Dodge Sprinter. Service manual — part 8
TEST
ACTION
APPLICABILITY
3
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN IGNITION
OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE
PROCEEDING.
Disconnect the Load Tool from the Driver Seat Belt Tensioner connector.
Disconnect the Airbag Control Module Connector(s).
NOTE: Check connectors - Clean and repair as necessary.
Connect the appropriate Load Tool ACM Adaptor to the Airbag Control Module
connector(s).
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN IGNITION
ON, THEN RECONNECT THE BATTERY.
Measure the voltage of the Driver SBT Line 1 and Line 2 circuits between the Driver
SBT connector and ground.
Is there any voltage present?
All
Yes
→ Repair Driver Seat Belt Tensioner Line 1 or Line 2 circuit short to
battery.
Perform AIRBAG VERIFICATION TEST - VER 1.
No
→ Go To 4
4
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 the Service
Information. WARNING: IF THE AIRBAG CONTROL MODULE
IS DROPPED AT ANY TIME, IT MUST BE REPLACED.
Perform AIRBAG VERIFICATION TEST - VER 1.
29
AIRBAG
DRIVER SEAT BELT TENSIONER SHORT TO BATTERY —
Continued
TEST
ACTION
APPLICABILITY
5
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 circuits, rotate the steering wheel from stop to stop.
You have just attempted to simulate the condition that initially set the trouble code
message.
Did the DTC become active?
All
Yes
→ Select appropriate symptom from Symptom List.
No
→ No problem found at this time. Erase all codes before returning
vehicle to customer.
30
AIRBAG
DRIVER SEAT BELT TENSIONER SHORT TO BATTERY —
Continued
Symptom:
DRIVER SEAT BELT TENSIONER SHORT TO GROUND
When Monitored and Set Condition:
DRIVER SEAT BELT TENSIONER SHORT TO GROUND
When Monitored:
With the ignition on the ACM monitors the voltage of the Driver Seat
Belt Tensioner circuits.
Set Condition:
When the ACM detects a short to ground in either Driver Seat Belt
Tensioner circuits.
POSSIBLE CAUSES
DRIVER SEAT BELT TENSIONER SHORT TO GROUND
DRIVER SEAT BELT LINE 1 OR LINE 2 SHORT TO GROUND
ACM, DRIVER SEAT BELT TENSIONER SHORT TO GROUND
STORED CODE OR INTERMITTENT CONDITION
ACTIVE CODE PRESENT
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
NOTE: Ensure 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
ACM - STORED DTC
NOTE: When reconnecting airbag system components the Ignition must be
turned off and the Battery must be disconnected.
2
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN IGNITION
OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE
PROCEEDING.
Disconnect the Driver Seat Belt Tensioner connector.
NOTE: Check connectors - Clean and repair as necessary.
Connect the appropriate Load Tool to the Driver Seat Belt Tensioner connector.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN IGNITION
ON, THEN RECONNECT THE BATTERY.
With the DRBIII
t, read the active Airbag Control Module DTC’s.
Does the DRBIII
t display DRIVER SEAT BELT TENSIONER SHORT TO
GROUND?
All
Yes
→ Go To 3
No
→ Replace the Driver Seat Belt Tensioner in accordance with the
Service Information.
Perform AIRBAG VERIFICATION TEST - VER 1.
31
AIRBAG
TEST
ACTION
APPLICABILITY
3
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN IGNITION
OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BEFORE
PROCEEDING.
Disconnect the Load Tool from the Driver Seat Belt Tensioner connector.
Disconnect the Airbag Control Module connector(s).
NOTE: Check connectors - Clean and repair as necessary.
Connect the appropriate Load Tool ACM Adaptor to the Airbag Control Module
connector(s).
Measure the resistance of the Driver SBT Line 1 and Line 2 circuits between the
Driver SBT connector and ground.
Is the resistance below 10K ohms on either circuit?
All
Yes
→ Repair Driver Seat Belt Tensioner Line 1 or Line 2 circuits short
to ground.
Perform AIRBAG VERIFICATION TEST - VER 1.
No
→ Go To 4
4
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 the Service
information.
Perform AIRBAG VERIFICATION TEST - VER 1.
5
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 circuits, rotate the steering wheel from stop to stop.
You have just attempted to simulate the condition that initially set the trouble code
message.
Did the DTC become active?
All
Yes
→ Select appropriate symptom from Symptom List.
No
→ No problem found at this time. Erase all codes before returning
vehicle to customer.
32
AIRBAG
DRIVER SEAT BELT TENSIONER SHORT TO GROUND —
Continued
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