P1605

P1605 A/T DIAGNOSIS COMMUNICATION LINE

Description

NOTE: If DTC is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to "DTC U1000 CAN COMMUNICATION LINE".

The malfunction information related to A/T (Automatic Transmission) is transferred through the CAN communication line from TCM (Transmission control module) to ECM. Therefore, be sure to erase the DTC malfunction information not only in TCM (Transmission control module) but also ECM after an A/T related repair.

On Board Diagnosis Logic
Malfunction is detected when an incorrect signal from TCM (Transmission control module) is sent to ECM.

Possible Cause
- Dead (Weak) battery
- TCM (Transmission control module)

DTC Confirmation Procedure

NOTE: If "DTC Confirmation Procedure" has been previously conducted, always turn ignition switch "OFF" and wait at least 10 seconds before conducting the next test.

TESTING CONDITION: Before performing the following procedure, confirm that battery voltage is more than 10.5 V at idle.

With CONSULT-II
1. Turn ignition switch "ON".
2. Select "DATA MONITOR" mode with CONSULT-II.




3. Start engine and wait at least 40 seconds.
4. If 1st trip DTC is detected, go to "Diagnostic Procedure".

With GST
Follow the procedure "WITH CONSULT-II" above.

Step 1:

Diagnostic Procedure