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Diagnostic Procedure

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P1694-BUS COMMUNICATION WITH ENGINE MODULE DIAGNOSTIC TEST REFERENCE

TEST ACTION APPLICABILITY
1 With the DRBIII®, erase Transmission DTC's.
Start the Engine in Park.
With the DRBIII®, read Transmission DTCs.
NOTE: The Engine must run for at least 20 seconds to reset this DTC.

Did the DTC reset after the engine was started?
Yes --> Go To 2
No --> Go To 3		 All
2 Using the schematics as a guide, inspect the wiring and connectors. Repair as necessary. Pay particular attention to all power and ground circuits.
If there are no possible causes remaining, view repair.
Repair
Replace the Powertrain Control Module per the Service Information. WITH THE DRBIII® PERFORM QUICK LEARN .
Perform 42RLE (NGC) TRANSMISSION VERIFICATION TEST - VER 1 .		 All
3 The conditions necessary to set the DTC are not present at this time.
Make sure to check for any Communication DTCs or customer concerns of possible bus problems. This includes any other controllers on the bus on this vehicle. If there is a bus problem refer to the COMMUNICATION CATEGORY  for diagnosis.
With the DRBIII®, check the EATX EVENT DATA to help identify the conditions in which the DTC was set.
Were there any problems found?
Yes --> Repair as necessary.
Perform 42RLE (NGC) TRANSMISSION VERIFICATION TEST - VER 1 .
No --> Test Complete.		 All
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