P1704

DTC P1704 TRANSMISSION CONTROL MODULE (EEPROM)

Description
The TCM consists of a microcomputer and connectors for signal input and output and for power supply. The TCM controls the A/T.

On Board Diagnosis Logic
^ This is not an OBD-II self-diagnostic item.
^ Diagnostic trouble code "TCM EEPROM" with CONSULT-II is detected when TCM memory EEPROM is malfunctioning.

Possible Cause
TCM.

DTC Confirmation Procedure

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

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-II
1. Turn ignition switch "ON". (Do not start engine.)





2. Select "DATA MONITOR" mode for "A/T" with CONSULT-II.
3. Start engine.
4. Run engine for at least 2 consecutive seconds at idle speed.
5. If DTC is detected, go to "Diagnostic Procedure".

Diagnostic Procedure
1. CHECK DTC
With CONSULT-II
1. Turn ignition switch "ON" and select "SELF DIAGNOSIS" mode for "A/T" with CONSULT-II.





2. Move selector lever to "R" position.
3. Depress accelerator pedal (Full throttle position).
4. Touch "ERASE".
5. Turn ignition switch "OFF" and wait at least 10 seconds.
6. Turn ignition switch "ON" with selector lever "P" position.
7. Perform "DTC Confirmation Procedure".

Is the "TCM EEPROM" displayed again?
Yes >> Replace the transmission assembly.
No >> INSPECTION END