Pinpoint Test 23: The Tire Pressure Monitoring System (TPMS) Warning Indicator Is Never/Always On

PINPOINT TEST 23: THE TIRE PRESSURE MONITORING SYSTEM (TPMS) WARNING INDICATOR IS NEVER/ALWAYS ON

Normal Operation

NOTE:The smart junction box (SJB) is also known as the generic electronic module (GEM).The instrument cluster receives the TPMS status from the SJB/GEM over the high speed controller area network (HS-CAN) communication bus. If the TPMS detects a fault condition, the TPMS warning indicator flashes for 30 seconds then turns off until the next ignition cycle. If the TPMS is in TPMS sensor training mode, the TPMS warning indicator flashes continuously until the TPMS sensor training session has ended. See Tire Pressure Monitoring System (TPMS). The instrument cluster sets DTC U2023 in continuous memory if the TPMS message is missing or the data is invalid for more than 5 seconds and the instrument cluster flashes the TPMS warning indicator for 60 seconds and then turns the TPMS warning indicator on.
DTC U0140 (Lost Communication With the Body Control Module [GEM]) - is a continuous DTC that sets in the instrument cluster if the door ajar status message is missing for more than 5 seconds and the instrument cluster turns on the door ajar warning indicator.

This pinpoint test is intended to diagnose the following:
- SJB/GEM
- Instrument cluster

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