P1694

DTC P1694
The PCM and the SMARTRA communicate by dedicated line. During this communication of PCM and SMARTRA the K line of PCM cannot be used for communication. The PCM controls the communication either to SMARTRA or to other devices(e.g. scanner) on K line by switching of a multiplexer and specific communication procedures. The multiplexer is a part of PCM hard ware.

DTC DESCRIPTION
This DTC indicates that request from PCM is invalid or request has corrupt data.

DTC Detecting Condition:

DTC DETECTING CONDITION

MONITOR SCANTOOL DATA
1. Ignition "ON" & Engine "OFF".
2. Connect Scan tool and clear the DTCs.
3. If the DTCs are retrieved again, monitor "CURRENT DATA" to check No. of Learnt key, PCM and KEY status.




Fig 1 : PCM has not matched with any Key yet.




Fig 2 : PCM Internal Failure.




Fig 3 : IG On with unmatched key.




Fig 4 : 2(two) Keys have been matched with PCM.

4. Are both Key and PCM status learnt?

YES - Fault is intermittent caused by poor contact in the SMARTRA's and/or PCM's connector or was repaired and PCM memory was not cleared. Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

NO - Go to "Component Inspection" procedure.

COMPONENT INSPECTION
1. Check PCM
A. Ignition "ON" & Engine "OFF".
B. Perform Key Teaching Procedure in "Reference Data" described in General Information.
C. Is the Key teaching completed?

YES - Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.

NO - Substitute with a known-good PCM and check for proper operation. If the problem is corrected, replace PCM and then go to "Verification of Vehicle repair" procedure.

NOTE:
- Don't forget to prepare for the PIN of the vehicle before removing PCM from the vehicle.
- Remember that substituting with a known-good PCM should be followed "The things to remember before replacement (PCM)". (In case of faulty PCM, it has to be replaced with "VIRGIN" or "NEUTRAL" PCM.)
- Ensure that the correct PIN is entered when replacing a new PCM.

VERIFICATION OF VEHICLE REPAIR
After a repair, it is essential to verify that the fault has been corrected.
1. Connect scan tool and monitor CURRENT DATA to check No. of Learnt key, PCM and KEY status.
2. Select Diagnostic Trouble Codes(DTCs)" mode and Clear the DTCs.
3. Are any DTCs present?

YES - Go to the applicable troubleshooting procedure.

NO - System is performing to specification at this time.