Chrysler Sebring, Stratus sedan, Sebring Convertible. Manual — part 54
Symptom:
*NO RESPONSE FROM ACM
POSSIBLE CAUSES
CHECKING FOR VOLTAGE AT ACM
GROUND CIRCUIT OPEN
AIRBAG CONTROL MODULE
PCI BUS CIRCUIT OPEN
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Ensure that the battery is fully charged.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Disconnect the Airbag Control Module harness connector (C2 connector on premium).
Connect the appropriate Load Tool ACM Adapter to the ACM connector.
Turn the ignition on and then reconnect the Battery.
Using a 12-volt test light connected to ground, probe the Fused Ignition Switch
Output Run Circuit and the Fused Ignition Switch Output Run/Start Circuit.
NOTE: One open circuit will not cause a NO RESPONSE condition.
Is the test light illuminated on both circuits?
All
Yes
→ Go To 2
No
→ Repair the Fused Ignition Switch Output Run and Fused Ignition
Switch Output Run/Start circuits for an open. Replace the fuse(s)
if necessary.
Perform __AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting airbag system components, the ignition must be
turned off and the battery must be disconnected.
2
Ensure that the battery is fully charged.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Disconnect the Airbag Control Module harness connector (C2 connector on premium).
Connect the appropriate Load Tool ACM Adapter to the ACM connector.
Using a 12-volt test light connected to 12-volts, probe the ground circuit.
NOTE: Make sure test light is connected to the Battery positive terminal.
Is the test light illuminated?
All
Yes
→ Go To 3
No
→ Repair the Ground circuit for an open.
Perform __AIRBAG VERIFICATION TEST - VER 1.
When reconnecting Airbag system components, the ignition must be turned
off and the battery must be disconnected.
201
COMMUNICATION
TEST
ACTION
APPLICABILITY
3
Note: Ensure there is PCI bus communication with other modules. If not,
refer to the PCI Bus Communication Failure symptom and repair as
necessary.
WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNI-
TION OFF, DISCONNECT THE BATTERY AND WAIT TWO MINUTES BE-
FORE PROCEEDING.
Disconnect the Airbag Control Module harness connector (C2 connector on premium).
Connect the appropriate Load Tool ACM Adapter to the ACM connector.
Turn the ignition on and then reconnect the Battery.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII
t, select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again
when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the ACM connector.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
All
Yes
→ Replace the Airbag Control Module in accordance with the service
information. WARNING: Make sure the battery is disconnected
and wait 2 minutes before proceeding.
Perform __AIRBAG VERIFICATION TEST - VER 1.
No
→ Go To 4
4
WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
Disconnect the Airbag Control Module harness connector (C2 connector on premium).
Connect the appropriate Load Tool ACM Adapter to the ACM connector.
Disconnect the BCM C2 harness connector.
Measure the resistance of the PCI bus circuit between the ACM connector and the
BCM C2 connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Body Control Module in accordance with the service
information.
Perform __AIRBAG VERIFICATION TEST - VER 1.
No
→ Repair the PCI Bus circuit for an open.
Perform __AIRBAG VERIFICATION TEST - VER 1.
202
COMMUNICATION
*NO RESPONSE FROM ACM —
Continued
Symptom:
*NO RESPONSE FROM AUTOMATIC TEMPERATURE CONTROL
MODULE
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE BCM
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
GROUND CIRCUIT OPEN
AUTOMATIC TEMPERATURE CONTROL HEAD
PCI BUS CIRCUIT OPEN
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, enter Body then Body Computer.
Was the DRB able to I/D or communicate with the BCM?
All
Yes
→ Go To 2
No
→ Refer to the symptom list for problems related to no communica-
tion with the BCM.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Automatic Temperature Control Head harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the Fused Ignition Switch
Output circuit.
Is the test light illuminated?
All
Yes
→ Go To 3
No
→ Repair the Fused Ignition Switch Output circuit for an open or
short. Refer to the wiring diagrams in the service information.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Automatic Temperature Control Head harness connector.
Using a 12-volt test light connected to 12-volts, probe both ground circuits (cavities
1 and 3).
Is the test light illuminated for both circuits?
All
Yes
→ Go To 4
No
→ Repair the ground circuit(s) for an open.
Perform BODY VERIFICATION TEST - VER 1.
203
COMMUNICATION
TEST
ACTION
APPLICABILITY
4
Note: Ensure there is PCI Bus communication with other modules on the
vehicle before proceeding. If not, refer to the symptom list from the menu
and repair as necessary.
Disconnect the Automatic Temperature Control Head harness connector.
Use Scope input cable CH7058, Cable to Probe adapter CH7062, and the red and
black test probes.
Connect the scope input cable to the channel one connector on the DRB. Attach the
red and black leads and the cable to probe adapter to the scope input cable.
With the DRBIII
t select Pep Module Tools.
Select lab scope.
Select Live Data.
Select 12 volt square wave.
Press F2 for Scope.
Press F2 and use the down arrow to set voltage range to 20 volts. Press F2 again
when complete.
Connect the Black lead to the chassis ground. Connect the Red lead to the PCI Bus
circuit in the ATC Head connector.
Turn the ignition on.
Observe the voltage display on the DRB Lab Scope.
Does the voltage pulse from 0 to approximately 7.5 volts?
All
Yes
→ Replace the Automatic Temperature Control Head in accordance
with the service information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 5
5
Turn the ignition off.
Disconnect the ATC Head harness connector.
Disconnect the BCM C2 harness connector.
Measure the resistance of the PCI bus circuit between the ATC Head connector and
the BCM C2 connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Body Control Module in accordance with the service
information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the PCI Bus circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
204
COMMUNICATION
*NO RESPONSE FROM AUTOMATIC TEMPERATURE CONTROL MOD-
ULE —
Continued
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