TPMS Receiver
TPM Receiver is
integrated with the TPM module installed in the center console (behind the
audio). The operating battery of TPM module is supplied from the vehicle
battery.
The LOW-LINE TPMS
Receiver unit’s MCU and RF receiver circuits are active while the
vehicle’s ignition circuit is energized. It continuously monitors for RF
broadcasts from nearby WE units.
The TPMS Receiver unit
has nonvolatile memory in which the ID codes of the WE units fitted to
that particular vehicle are stored.
When the TPMS Receiver
unit receives an information broadcast, it checks to see if the ID code
contained within that broadcast matches one of the ID codes stored within
its nonvolatile memory. If this is the case, the TPMS Receiver applies the
information contained within that broadcast to the TPMS Warning Algorithm.
This algorithm evaluates
the pressure and temperature of each tire for changes over time, and is
responsible for making the decision to alert the driver to a potentially
dangerous tire inflation condition via a visible ‘TREAD’
indicator.
In addition to
processing data from the WE units, the TPMS Receiver is also capable of
self-diagnosis of its circuitry and operating condition.
This DTC indicates that
the Vehicle/receiver battery level is Low.
Item
|
Detecting
Condition
|
Possible cause
|
DTC
strategy
|
| •
|
Check vehicle battery
voltage | |
|
Enable
conditions
|
|
Threshold
value
|
| •
|
Battery voltage < 9.0
V |
| •
|
Consecutive over 2
sec. | |
Diagnosis
time
|
| •
|
Within 3 sec. after IGN
ON | |
| 1. |
Start engine and turn headight and rear
defroster on. |
| 2. |
Connect 'TPMS exciter' or scantool to Data
Link Connector(DLC). |
| 3. |
Select "TPMS DIAGNOSIS"
mode. |
| 4. |
Select the "INPUT VALUES" mode of "CURRENT
DATA" function. |
| 5. |
Maintaining ENG. RPM at 2,500RPM(idle) over 2
minutes. |
| 6. |
Monitor the parameter of 'BATTARY VOLTAGE' on
the 'TPMS exciter' or scantool.
Specification
: 'BATTARY VOLTAGE' is more than 10
V
| |
| 7. |
Is parameter within
specifications?
|
|
▶ Fault is
intermittent. It has been repaired and TPMS receiver module
memory is not cleared yet.
▶ Go to
"Verification of vehicle Repair" procedure.
|
|
|
▶ Go to
"Inspection/Repair"
procedure.
|
|
| Terminal and Connector
Inspection |
| 1. |
Many malfunctions in the electrical system are
caused by poor harness and terminal condition. Faults can also be
caused by interference from other electrical systems, and mechanical
or chemical damage. |
| 2. |
Thoroughly check all connectors (and
connections) for looseness, bending, corrosion, contamination,
deterioration, and/or damage. |
| 3. |
Has a problem been found?
|
|
▶ Repair if
necessary and then go to "Verification of Vehicle Repair"
procedure.
|
|
|
▶ Go to
"Charging System Inspection"
procedure.
|
|
| Charging System
Inspection |
| 2. |
headight and rear defroster
"ON". |
| 3. |
Measure voltage between terminal (+) and (-)
of battery maintaining ENG. RPM at 2,500RPM(idle) over 2
minutes.
Specification
: more than 10 V
| |
| 4. |
Is the measured voltage within
specifications?
|
|
▶
Substitute with a known-good TPMS receiver and check for
proper operation.
▶ If the problem
is corrected, replace TPMS receiver and then go to
"Verification of Vehicle Repair" procedure.
|
|
|
▶ Check for
fault in charging system and check for tension of generator
drive belt, ENG. idle rpm or open/short in harness from
battery to generator.
▶ Repair if
necessary and then go to "Verification of Vehicle Repair"
procedure.
|
|
| Verification of Vehicle
Repair |
After a repair, it is
essential to verify that the fault has been corrected.
| 1. |
Connect TPMS exciter or scantool and select
"Diagnostic Trouble Codes(DTCs)"
mode |
| 2. |
Using a TPMS exciter or scantool, Clear
DTC. |
| 3. |
Operate the vehicle within DTC Enable
conditions in General information. |
| 4. |
Are any DTCs present ?
|
|
▶ Go to the
applicable troubleshooting procedure.
|
|
|
▶ System
performing to specification at this
time.
|
|
