Chrysler Pacifica. Manual — part 264
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.
1053
TELECOMMUNICATION
PCI BUS BUSY —
Continued
Symptom List:
PHONE SWITCH STUCK
VOICE RECOGNITION SWITCH STUCK
VOICE RECOGNITION/PHONE SWITCH CIRCUIT RATIONALITY
VOICE RECOGNITION/PHONE SWITCH CIRCUIT SHORT TO
GROUND
VOICE RECOGNITION/PHONE SWITCH CIRCUIT SHORT TO
VOLTAGE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be PHONE SWITCH STUCK.
When Monitored and Set Condition:
PHONE SWITCH STUCK
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects voltage between 2.8 volts and 3.3 volts on
the VR/Phone Switch Signal circuit for more than 30 seconds.
VOICE RECOGNITION SWITCH STUCK
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects voltage between 3.5 volts and 4.0 volts on
the VR/Phone Switch Signal circuit for more than 30 seconds.
VOICE RECOGNITION/PHONE SWITCH CIRCUIT RATIONALITY
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects an invalid voltage signal on the VR/Phone
Switch Signal circuit.
VOICE RECOGNITION/PHONE SWITCH CIRCUIT SHORT TO GROUND
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects voltage below 0.6 volt on the VR/Phone
Switch Signal circuit.
VOICE RECOGNITION/PHONE SWITCH CIRCUIT SHORT TO VOLTAGE
When Monitored:
With the ignition on.
Set Condition:
The Hands Free Module detects voltage above 4.7 volts on the VR/Phone
Switch Signal circuit.
POSSIBLE CAUSES
HANDS FREE MODULE
1054
TELECOMMUNICATION
POSSIBLE CAUSES
HANDS FREE MODULE
HANDS FREE MODULE
REAR VIEW MIRROR
SENSOR GROUND CIRCUIT OPEN
VR/PHONE SWITCH SIGNAL CIRCUIT OPEN
VR/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO GROUND
VR/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO SENSOR GROUND
VR/PHONE SWITCH SIGNAL CIRCUIT SHORTED TO VOLTAGE
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the Rear View Mirror harness connector.
Turn the ignition on.
Measure the voltage of the VR/Phone Switch Signal circuit in the Rear View Mirror
harness connector.
Chose which of the following describes the voltage measured.
All
Voltage is above 5.3 volts
Voltage is between 4.7 and 5.3 volts
Voltage is below 4.7 volt
2
Turn the ignition off.
Disconnect the Rear View Mirror harness connector.
Disconnect the Hands Free Module harness connector.
Turn the ignition on.
Measure the voltage of the VR/Phone Switch Signal circuit.
Is the voltage below 1.0 volt?
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
→ Repair the VR/Phone Switch Signal circuit for a short to voltage.
Perform BODY VERIFICATION TEST - VER 1.
1055
TELECOMMUNICATION
PHONE SWITCH STUCK —
Continued
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Rear View Mirror harness connector.
Turn the ignition on.
With the DRBIII
t, read the VR/Phone Switch Signal voltage.
Connect one end of a jumper wire to the VR/Phone Switch Signal circuit at the Rear
View Mirror harness connector.
While observing the DRBIII
t, momentarily connect and disconnect the other end of
the jumper wire to Sensor Ground at the Rear View Mirror harness connector.
NOTE: The DRBIII
t sensor voltage should switch from above 4.7 volts when
jumper is not connected to below 0.6 volts when jumper is connected.
Does sensor voltage switch from above 4.7 volts to below 0.6 volt as described?
All
Yes
→ Replace the Rear View Mirror in accordance with the service
information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ 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.
4
Turn the ignition off.
Disconnect the Rear View Mirror harness connector.
Disconnect the Hands Free Module harness connector.
Measure the resistance of the VR/Phone Switch Signal circuit.
Is the resistance below 10.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the VR/Phone Switch Signal circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Disconnect the Rear View Mirror harness connector.
Disconnect the Hands Free Module harness connector.
Measure the resistance of the Sensor Ground circuit.
Is the resistance below 10.0 ohms?
All
Yes
→ Go To 6
No
→ Repair the Sensor Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Disconnect the Rear View Mirror harness connector.
Disconnect the Hands Free Module harness connector.
Measure the resistance between ground and the VR/Phone Switch Signal circuit.
Is the resistance above 1000.0 ohms?
All
Yes
→ Go To 7
No
→ Repair the VR/Phone Switch Signal circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
1056
TELECOMMUNICATION
PHONE SWITCH STUCK —
Continued
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