ETS Off Indicator Off With No DTCs Set

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Part 2 Of 2:

CIRCUIT DESCRIPTION
Four-way serial communication is sent back and forth between the EBCM, IPC, PCM, and the BCM. A message from the IPC is sent to the BCM 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.

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

TEST DESCRIPTION
2. This test determines if the malfunction is caused by the IPC.
3. This test determines if the malfunction is caused by the ETS Off switch.
4. This test checks for an open or high resistance in the ETS Off switch ground circuit.
5. This test checks for an open or high resistance in the switched input to the BCM.