Chrysler Pacifica. Manual — part 267
TIRE SENSOR 3 LOW PRESSURE ALERT
When Monitored:
Ignition ON.
Set Condition:
Fault is set when there is a low tire pressure condition or sensor pressure
measurement failure from the number 3 Sensor/Transmitter.
TIRE SENSOR 3 TRANSMIT FAILURE
When Monitored:
Ignition ON.
Set Condition:
Fault is set when the SKREEM does not receive eight consecutive RF
transmissions from the number 3 Sensor/Transmitter.
TIRE SENSOR 4 LOW PRESSURE ALERT
When Monitored:
Ignition ON.
Set Condition:
Fault is set when there is a low tire pressure condition or sensor pressure
measurement failure from the number 4 Sensor/Transmitter.
TIRE SENSOR 4 TRANSMIT FAILURE
When Monitored:
Ignition ON.
Set Condition:
Fault is set when the SKREEM does not receive eight consecutive RF
transmissions from the number 4 Sensor/Transmitter.
POSSIBLE CAUSES
TIRE SENSOR LOW PRESSURE ALERT
SENSOR/TRANSMITTER INTERNAL FAULT
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TIRE PRESSURE MONITORING
INITIALIZATION FAULT —
Continued
TEST
ACTION
APPLICABILITY
1
NOTE: If the TPM indicator is illuminated, check for a low tire pressure
condition. If the TPM indicator is flashing, check for DTC’s.
NOTE: The below test is to locate the Tire Pressure Sensor/Transmitter.
NOTE: If the tires have been rotated, the Tire Pressure Sensor/Transmitters
are no longer in sequence from the factory. Faults are linked to Sensor/
Transmitter ID’s.
NOTE: You must determine which Tire Pressure Sensor/Transmitter has set
the fault or alert before diagnosing the system correctly.
NOTE: Set ALL tire pressures to recommended specifications and recheck
for faults/alerts.
The fault will set within two minutes when at 20 PSI.
Starting with the left front wheel, deflate the tire down to 20 PSI and wait 2 minutes.
If the TPMS fault was detected and associated to this Sensor/Transmitter, it would
correspond to the left front Sensor/Transmitter.
If the TPMS fault was detected and not associated to this Sensor/Transmitter, repeat
the process until the faulty Sensor/Transmitter has been identified.
NOTE: Once a fault/alert has set, it will establish the location of the Tire
Pressure Sensors/Transmitter. Repeat steps until the applicable Tire Pres-
sure Sensor/Transmitter has been located.
Perform this procedure prior to Symptom diagnosis.
All
Continue
2
NOTE: The DTC can be caused by many different factors and might not be
a Sensor/Transmitter or SKREEM fault.
NOTE: Interference from other elements will over power the Sensor/
Transmitter RF frequency making erratic operation to the TPMS.
Cycle the ignition switch from OFF to ON.
With the DRBIII
t, read DTC’s.
Does the DRBIII
t display any TIRE SENSOR TRANSMIT FAILURE or INITIAL-
IZATION FAULT DTC’s?
All
Yes
→ Go To 4
No
→ Go To 3
3
Cycle the ignition switch from OFF to ON.
NOTE: Correct all tire pressure to recommended specifications and wait 2
minutes.
Drive the vehicle for 10 minutes at 20 mph (32km/h). The Sensors/transmitters will
be in drive mode operation.
With the DRBIII
t, read DTC’s.
Does the DRBIII
t display TIRE SENSOR LOW PRESSURE ALERT?
All
Yes
→ Check and adjust ALL tire pressures. Check connectors - Clean/
repair as necessary. If ok, replace and program the Tire Pressure
Sensor/Transmitter in accordance with the Service Information.
Perform TIRE PRESSURE VERIFICATION TEST - VER 1 -
SKREEM.
No
→ Go To 4
1066
TIRE PRESSURE MONITORING
INITIALIZATION FAULT —
Continued
TEST
ACTION
APPLICABILITY
4
NOTE: Some environment factors can disrupt the RF frequency signal.
Check for RF frequency concerns and aftermarket accessories that would
compromise the RF frequency signal before diagnosing Sensor/Transmitter
or SKREEM being the fault.
NOTE: Review with the customer their environmental driving conditions
within the first 10 minutes of driving.
Are there environmental factors causing the RF frequency issue?
All
Yes
→ Test Complete.
No
→ Go To 5
5
Turn the ignition off.
Replace the appropriate Tire Pressure Sensor/Transmitter in accordance with the
service information.
Drive the vehicle for 10 minutes at 20 mph (32km/h). The Sensors/transmitters will
be in drive mode operation.
With the DRBIII
t, read DTC’s.
Does the DTC reset?
All
Yes
→ Check connectors - Clean/repair as necessary. Replace and pro-
gram the SKREEM in accordance with the Service Information.
Perform TIRE PRESSURE VERIFICATION TEST - VER 1 -
SKREEM.
No
→ Test Complete.
1067
TIRE PRESSURE MONITORING
INITIALIZATION FAULT —
Continued
Symptom List:
PRNDL MESSAGE MISSING
VEHICLE SPEED MESSAGE MISSING
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be PRNDL MESSAGE MISSING.
When Monitored and Set Condition:
PRNDL MESSAGE MISSING
When Monitored:
Ignition ON.
Set Condition:
Fault is set when there is a loss of the PRNDL message if not received for
5 seconds.
VEHICLE SPEED MESSAGE MISSING
When Monitored:
Ignition ON.
Set Condition:
Fault is set when there is a loss of the vehicle speed message if not
received for 5 seconds.
POSSIBLE CAUSES
PCM DTC’S
INSTRUMENT CLUSTER DTC’S
BUS COMMUNICATION
SKREEM FAULT
1068
TIRE PRESSURE MONITORING
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