Dodge Ram. Manual — part 127
Symptom List:
MIRROR POWER CIRCUIT SHORT TO GROUND
MIRROR POWER CIRCUIT SHORT TO VOLTAGE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be MIRROR POWER CIRCUIT
SHORT TO GROUND.
POSSIBLE CAUSES
AUTOMATIC DAY/NIGHT MIRROR
HANDS FREE MICROPHONE HSD FEED OPEN
HANDS FREE MICROPHONE HSD FEED SHORT TO GROUND
HANDS FREE MICROPHONE HSD FEED SHORT TO OTHER CIRCUITS
HANDS FREE MICROPHONE HSD FEED SHORT TO VOLTAGE
HANDS FREE MODULE
INTERMITTENT CONDITION
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, erase DTCs.
Attempt to make a phone call using the system.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display this DTC?
All
Yes
→ Go To 2
No
→ Go To 7
2
Turn the ignition off.
Disconnect the Automatic Day/Night Mirror harness connectors.
Disconnect the Hands Free Module harness connector.
Measure the resistance of the Hands Free Microphone HSD Feed.
Is the resistance below 10.0 ohms?
All
Yes
→ Go To 3
No
→ Repair the Hands Free Microphone HSD Feed for an open.
Perform BODY VERIFICATION TEST - VER 1.
3
Turn the ignition off.
Disconnect the Automatic Day/Night Mirror harness connectors.
Disconnect the Hands Free Module harness connector.
Measure the resistance between ground and the Hands Free Microphone HSD Feed.
Is the resistance above 1000.0 ohms?
All
Yes
→ Go To 4
No
→ Repair the Hands Free Microphone HSD Feed for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
505
TELECOMMUNICATION
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the Automatic Day/Night Mirror harness connectors.
Disconnect the Hands Free Module harness connector.
Turn the ignition on.
Measure the voltage of the Hands Free Microphone HSD Feed.
Is the voltage below 1.0 volt?
All
Yes
→ Go To 5
No
→ Repair the Hands Free Microphone HSD Feed for a short to
voltage.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Disconnect the Automatic Day/Night Mirror harness connectors.
Disconnect the Hands Free Module harness connector.
Measure the resistance between the Hands Free Microphone HSD Feed and each of
the other circuits in the Automatic Day/Night Mirror harness connector.
Is the resistance above 1000 ohms for each measurement?
All
Yes
→ Go To 6
No
→ Repair the Hands Free Microphone HSD Feed for a short to other
circuits.
Perform BODY VERIFICATION TEST - VER 1.
6
Replace the Automatic Day/Night Mirror in accordance with the Service Information.
Turn the ignition on.
With the DRBIII
t, erase the DTC’s
Attempt to make a phone call using the system.
With the DRBIII
t, read DTCs.
Does the DRBIII
t display this DTC?
All
Yes
→ Inspect the wiring and connectors for damage or shorted circuits.
Repair as necessary. If ok, replace and program the Hands Free
Module in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
7
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, wiggle the wiring
harnesses. This is to try and duplicate the failure.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
506
TELECOMMUNICATION
MIRROR POWER CIRCUIT SHORT TO GROUND —
Continued
Symptom List:
PCI BUS BUSY
PCI BUS CIRCUIT OPEN
PCI BUS CIRCUIT SHORT TO GROUND
PCI BUS CIRCUIT SHORT TO VOLTAGE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be PCI BUS BUSY.
When Monitored and Set Condition:
PCI BUS BUSY
When Monitored:
With the ignition on.
Set Condition:
The HFM has detected a fault on the PCI Bus circuit.
PCI BUS CIRCUIT OPEN
When Monitored:
With the ignition on.
Set Condition:
The HFM has detected a fault on the PCI Bus circuit.
PCI BUS CIRCUIT SHORT TO GROUND
When Monitored:
With the ignition on.
Set Condition:
The HFM has detected a fault on the PCI Bus circuit.
PCI BUS CIRCUIT SHORT TO VOLTAGE
When Monitored:
With the ignition on.
Set Condition:
The HFM has detected a fault on the PCI Bus circuit.
POSSIBLE CAUSES
INTERMITTENT CONDITION
507
TELECOMMUNICATION
TEST
ACTION
APPLICABILITY
1
NOTE: For this code to be active, the DRBIII
t will not be able to communi-
cate with any modules on the vehicle (except the PCM).
NOTE: Clear the code. If this code continues to set and the DRBIII
t can still
communicate with the module, it will be necessary to replace the module.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, wiggle the wiring
harnesses. This is to try and duplicate the complete bus failure condition.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
508
TELECOMMUNICATION
PCI BUS BUSY —
Continued
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