Dodge Dakota (R1). Manual — part 34
TEST
ACTION
APPLICABILITY
5
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 SKIM 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 SKIM 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
→
No
→
Repair the PCI Bus circuit for an open.
Perform SKIS VERIFICATION.
6
If there are no possible causes remaining, view repair.
All
Repair
Replace and program the Sentry Key Immobilizer Module in
accordance with the Service Information.
Perform SKIS VERIFICATION.
133
COMMUNICATION
*BUS +/- SIGNALS OPEN OR NO RESPONSE FROM SENTRY KEY IMMO-
BILIZER MODULE —
Continued
Symptom:
*NO RESPONSE FROM AIRBAG CONTROL MODULE
POSSIBLE CAUSES
CHECKING FOR VOLTAGE AT ACM
GROUND CIRCUIT OPEN
OPEN PCI BUS CIRCUIT
AIRBAG CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Ensure that the battery is fully charged.
WARNING: TURN THE IGNITION OFF, DISCONNECT THE BATTERY AND
WAIT TWO MINUTES BEFORE PROCEEDING.
Disconnect the ACM harness 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 at
the ACM connector.
NOTE: One open circuit will not cause a NO RESPONSE condition.
Is the test light illuminated on both circuits?
All
Yes
→
No
→
Repair the Fused Ignition Switch Output (Run) and Fused
Ignition Switch Output (Run/Start) circuits for an open.
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
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.
Warning: Turn the ignition Off, disconnect the Battery and wait 2 minutes
before proceeding.
Disconnect the Airbag Control Module harness connector.
Measure the resistance between ground and the ground circuit.
Is the resistance below 5.0 ohms?
All
Yes
→
No
→
Repair the ground circuit for an open.
Perform AIRBAG VERIFICATION TEST - VER 1.
Note: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
134
COMMUNICATION
TEST
ACTION
APPLICABILITY
3
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.
Turn the ignition off and wait 2 minutes before proceeding.
Disconnect the Airbag Control Module 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.
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.
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
→
No
→
Repair the PCI Bus circuit for an open.
Perform AIRBAG VERIFICATION TEST - VER 1.
NOTE: When reconnecting Airbag system components, the ignition must be
turned off and the battery must be disconnected.
4
If there are no possible causes remaining, view repair.
All
Repair
Replace the Airbag Control Module (ACM) in accordance with the
Service Information.
Perform AIRBAG VERIFICATION TEST - VER 1.
135
COMMUNICATION
*NO RESPONSE FROM AIRBAG CONTROL MODULE —
Continued
Symptom:
*NO RESPONSE FROM CONTROLLER ANTILOCK BRAKE
POSSIBLE CAUSES
NO RESPONSE FROM CAB
REPLACE FUSE #27
CONTROLLER ANTILOCK BRAKE SHORTED TO GROUND
FUSED IGNITION SWITCH OUTPUT CIRCUIT SHORTED TO GROUND
JUNCTION BLOCK SHORTED TO GROUND
GROUND CIRCUIT OPEN
OPEN FUSED IGNITION SWITCH OUTPUT CIRCUIT
OPEN PCI BUS CIRCUIT
CONTROLLER ANTILOCK BRAKE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
Note: As soon as one or more module communicates with the DRB, answer
the question.
With the DRB, attempt to communicate with the Instrument Cluster (MIC).
With the DRB, attempt to communicate with the Central Timer Module (CTM).
Was the DRB able to I/D or establish communications with either of the modules?
All
Yes
→
No
→
Refer to the Communications category and perform the symptom
PCI Bus Communication Failure.
Perform ABS VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Remove and inspect fuse #27 in the junction block.
Is the fuse open?
All
Yes
→
No
→
3
Turn the ignition off.
Replace Fuse #27 in the junction block.
Turn the ignition on.
Remove and inspect fuse #27 in the junction block.
Is the fuse open?
All
Yes
→
No
→
Check the Fused Ignition Switch Output circuit for an intermit-
tent short to ground, refer to the wiring diagrams in the service
information.
Perform ABS VERIFICATION TEST - VER 1.
136
COMMUNICATION
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