Circuit Description
The Instrument Panel Cluster (IPC) turns the LOW TIRE indicator on during the IPC bulb check for approximately 3 seconds then off, when the ignition switch is turned to the RUN position. If the EBCM/EBTCM sets a Diagnostic Trouble Code (DTC) the EBCM/EBTCM sends a class 2 message to the IPC to command the LOW TIRE Indicator on.
Diagnostic Aids
| • | It is very important that a thorough inspection of the wiring and connectors be performed. Failure to carefully and fully inspect wiring and connectors may result in misdiagnosis, causing part replacement with reappearance of the malfunction. |
| • | Thoroughly inspect any circuitry that may be causing the complaint for the following conditions: |
| - | Backed out terminals |
| - | Improper mating |
| - | Broken locks |
| - | Improperly formed or damaged terminals |
| - | Poor terminal-to-wiring connections |
| - | Physical damage to the wiring harness |
| • | The following conditions may cause an intermittent malfunction: |
| - | A poor connection |
| - | Rubbed-through wire insulation |
| - | A broken wire inside the insulation |
| • | If an intermittent malfunction exists refer to Intermittents and Poor Connections Diagnosis in Wiring Systems. |
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
DEFINITION: LOW TIRE Indicator does not turn ON during the Instrument Panel Cluster (IPC) bulb check and no ABS/ETS/TCS DTC(s) set. | ||||
1 | Was the Diagnostic System Check performed? | -- | Go to A Diagnostic System Check - ABS | |
2 |
Does the indicator turn on for approximately 3 seconds and then turn off? | -- | ||
3 |
All indicators will turn ON when commanded on. Will scan tool command the LOW TIRE Indicator on then off? | -- | ||
4 | Replace the EBCM/EBTCM. Refer to EBCM/EBTCM Replacement . Is the replacement complete? | -- | Go to A Diagnostic System Check - ABS | -- |
5 | Suspect the Instrument Panel. Refer to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to A Diagnostic System Check - ABS | -- |
6 | Refer to Tire Inflation Monitoring System Operation . | -- | System OK | -- |
