Suspension System

General Description

Various TPMS functions rely on a speed signal that reports reliably actual vehicle speed. Three speed signals(ABS1 FR wheel, EMS1 speed signal, TCS5 FR wheel) compared since one signal alone may report incorrect vehicle speed which would go undetected. Three signals must report same vehicle speed. If not, a DTC shall be set to active, and TPMS Warning indicator shall turn on.

DTC Description

This DTC indicates that there is a fault in speed inputs to receiver failure. It can be caused by damage to speed sensor, receiver input failure, incorrectly wired harness & shorted or open pins.

DTC Detecting Condition






Diagnostic Circuit Diagram






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?






Signal Circuit Inspection

Open Check
1. Ignition "OFF" & Engine "OFF".
2. Disconnect TPMS ECU, PCM and ABS ECU connector.
3. Measure resistance between CAN HIGH, LOW terminal of the TPMS ECU harness connector and CAN HIGH, LOW terminal terminal of the PCM harness connector.
4. Measure resistance between CAN HIGH, LOW terminal of the TPMS ECU harness connector and CAN HIGH, LOW terminal terminal of the ABS ECU harness connector.
5. Measure resistance between Vehicle speed in terminal of the PCM harness connector and Vehicle speed out terminal of the ABS ECU harness connector.
6. Measure resistance between FR WSS Power terminal of the ABS ECU harness connector and FR WSS Power terminal of the FR WSS harness connector.
7. Measure resistance between FR WSS Signal terminal of the ABS ECU harness connector and FR WSS Signal terminal of the FR WSS harness connector.

Specification :0 Ohms

8. Is the measured resistance within specifications?






Verification of Vehicle Repair

After a repair, it is essential to verify that the fault has been corrected.
1. Connect GDS and select "Diagnostic Trouble Codes(DTCs)" mode.
2. Using GDS, Clear DTC.
3. Operate the vehicle within DTC Enable conditions in General information.
4. Are any DTCs present ?