TPMS Receiver
The TPMS receiver uses
the vehicle standard speed input in both its auto-location and DTC
function. When there is a failure of this input, the Speed Sensor Fault
DTC shall be set to active, and TPMS Warning indicator shall turn
on.
This DTC indicates that
there is a speed input to receiver failure. It can be caused by damage to
speed sensor, receiver input failure, incorrectly wired harness &
shorted or open pins.
Item
|
Detecting
Condition
|
Possible cause
|
DTC
strategy
|
| •
|
Speed input signal
check | |
| •
|
Shorted/open speed
input | |
Enable
conditions
|
|
Threshold
value
|
| •
|
2 or more WE sensors transmit 3
consecutive normal timed RF message with status indicating
Rolling while the Vehicle Motion Status has been in the
"stopped" state for more than 4
minutes. |
| •
|
The speed input frequency is rejected as
too high (period < 4ms). |
| •
|
Vehicle speed calculates as > 250
km/h (155 mph) | |
Diagnosis
time
|
|
| 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
"Speedometer Inspection"
procedure.
|
|
Speedometer Inspection
| 1. |
Ignition "ON" & Engine
"ON". |
| 2. |
With vehicle raised on a lift , start the
engine and place transaxle in Drive. Let vehicle idle and verify
speedometer indicates approx. 10km/h or more(6mph or more) on the
instrument cluster. |
| 3. |
Does the speedometer indicate
normally?
|
|
▶ Go to
"Signal Circuit Inspection" procedure.
|
|
|
▶ Check for
open or short circuit between the Instrument Cluster connector
and the HECU connector.
▶ Repair if
necessary and then go to "Verification of Vehicle Repair"
procedure.
▶ If harness condition
is OK, Refer to DTC guide of the ABS
system.
|
|
| Signal Circuit
Inspection |
Open Check
| 1. |
Ignition "OFF" & Engine
"OFF". |
| 2. |
Disconnect TPMS connector and Instrument
cluster connector. |
| 3. |
Measure resistance between speed input
terminal of the TPMS harness connector and speed output terminal of
the Instrument cluster harness connector.
|
| 4. |
Is the measured resistance within
specifications?
|
|
▶ Check for
short circuit between TPMS harness connector and Instrument
cluster harness connector.
▶
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.
|
|
|
▶ Repair in
speed signal circuit between instrument cluster harness
connector and TPMS receiver harness connector 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.
|
|
