Circuit Description
Two-way serial communication is sent back and forth between the EBCM and the IPC. A message from the IPC is sent to the EBCM within seven seconds after ABS initialization. A serial communication failure does not allow the proper warning indicator commands to be sent back to the IPC.
Diagnostic Aids
The frequency of the malfunction can be checked by using the ENHANCED DIAGNOSTIC function of the scan tool, as described in Enhanced Diagnostics, found in this section.
The following conditions may cause an intermittent malfunction:
| • | A poor connection |
| • | Rubbed-through wire insulation |
| • | A broken wire inside the insulation |
Use the Lamp Test function of the Scan Tool in order to turn the indicator on while looking for an intermittent malfunction in the ETS OFF warning indicator circuitry.
Thoroughly inspect any circuitry that may cause the intermittent 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 |
Step | Action | Value(s) | Yes | No | ||||
|---|---|---|---|---|---|---|---|---|
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Important: Zero the J 39200 test leads before making any resistance measurements. Refer to the J 39200 user's manual. | ||||||||
1 | Was the Diagnostic System Check performed? | -- | Go to Diagnostic System Check | |||||
2 |
Did the warning indicators flash ON and OFF? | -- | ||||||
3 | Inspect all of the connectors and the terminals for the following conditions:
Do you see evidence of poor terminal contact or corrosion? | -- | ||||||
4 | Replace all of the terminals that exhibit signs of poor terminal contact or corrosion. Is the repair complete? | -- | Go to Diagnostic System Check | -- | ||||
5 | Repair the instrument panel cluster. Refer to Diagnostic System Check - Instrument Cluster in Instrument Panel, Gauges and Console. Is the repair complete? | -- | Go to Diagnostic System Check | -- | ||||
6 | The malfunction is not present at this time. Refer to Diagnostic Aids for more information. Is the action complete? | -- | System OK | -- | ||||
