Dodge Dakota (R1). Manual — part 33
TEST
ACTION
APPLICABILITY
8
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 A/C Heater Control C1 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 A/C Heater Control 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 BODY VERIFICATION TEST - VER 1.
9
If there are no possible causes remaining, view repair.
All
Repair
Replace the A/C Heater Control.
Perform BODY VERIFICATION TEST - VER 1.
129
COMMUNICATION
*BUS +/- SIGNALS OPEN OR NO RESPONSE FROM HVAC —
Continued
Symptom:
*BUS +/- SIGNALS OPEN OR NO RESPONSE FROM INSTRUMENT
CLUSTER
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE BCM
OPEN GROUND CIRCUIT(S)
OPEN FUSED IGNITION SWITCH OUTPUT CIRCUITS
OPEN FUSED B+ CIRCUIT
OPEN PCI BUS CIRCUIT
INSTRUMENT CLUSTER
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 CTM?
All
Yes
→
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.
Turn all lights off.
Disconnect the Instrument Cluster C1 harness connector.
Measure the resistance between ground and both ground circuits.
Is the resistance below 10.0 ohms for both measurements?
All
Yes
→
No
→
Repair the ground circuit(s) for an open.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe both Fused Ignition Switch
Output circuits.
Is the test light illuminated for both circuits?
All
Yes
→
No
→
Check Fuse #8 or Fuse #14 in the Junction Block for an open. If
ok repair the Fused Ignition Switch Output circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the Instrument Cluster C1 harness connector.
Using a 12-volt test light connected to ground, probe the Fused B+ circuit.
Is the test light illuminated?
All
Yes
→
No
→
Repair the Fused B+ circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
130
COMMUNICATION
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 Instrument Cluster C1 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 Instrument Cluster 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 BODY VERIFICATION TEST - VER 1.
6
If there are no possible causes remaining, view repair.
All
Repair
Replace the Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1.
131
COMMUNICATION
*BUS +/- SIGNALS OPEN OR NO RESPONSE FROM INSTRUMENT CLUS-
TER —
Continued
Symptom:
*BUS +/- SIGNALS OPEN OR NO RESPONSE FROM SENTRY KEY
IMMOBILIZER MODULE
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE CTM
GROUND CIRCUIT OPEN
FUSED IGNITION SWITCH OUTPUT CIRCUIT OPEN
FUSED B(+) CIRCUIT OPEN
OPEN PCI BUS CIRCUIT
SENTRY KEY IMMOBILIZER 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 CTM?
All
Yes
→
No
→
Refer to the symptom list for problems related to no communica-
tion with the CTM.
Perform SKIS VERIFICATION.
2
Turn the ignition off.
Disconnect the SKIM 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 SKIS VERIFICATION.
3
Turn the ignition off.
Disconnect the SKIM 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
→
No
→
Repair the Fused Ignition Switch Output circuit for an open.
Perform SKIS VERIFICATION.
4
Turn the ignition off.
Disconnect the SKIM harness connector.
Using a 12-volt test light connected to ground, probe the Fused B(+) circuit.
Is the test light illuminated?
All
Yes
→
No
→
Repair the Fused B+ circuit for an open.
Perform SKIS VERIFICATION.
132
COMMUNICATION
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