ETS Off Indicator On With No DTCs Set

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 ETS OFF indicator will be ON and the Enhanced Traction System will be disabled whenever the scan tool is connected to the DLC with the ignition switch is in the ON position.

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 a Powertrain malfunction has turned the ETS Off indicator ON.
3. This test determines if the malfunction is caused by the IPC.
4. This test checks for an ETS Off switch stuck in the closed position.
5. This test checks for a short to ground in the switched input to the BCM.