DTC P1604 A/T DIAGNOSIS COMMUNICATION LINE
EF & EC-7212prose procedureSystem Description
The malfunction information related to A/T (Automatic Transaxle) is transferred through the line (circuit) from TCM (Transmission Control Module) to ECM. Therefore, be sure to erase the malfunction information such as DTC not only in TCM (Transmission Control Module) but also ECM after the A/T related repair.
ECM Terminals and Reference Value
Specification data are reference values and are measured between each terminal and ground.
CAUTION
Do not use ECM ground terminals when measuring input/output voltage. Doing so may result in damage to the ECM's transistor. Use a gro[u]nd other than ECM terminals, such as the ground.
40
WIRE COLORLG
ITEMA/T check signal
CONDITIONIgnition switch "ON"
DATA (DC Voltage)0 - Approximately 5V
On Board Diagnosis Logic
P1605
Malfunction is detected when ...An incorrect singla from TCM (Transmission Control Module) is sent to ECM.
Check Items (Possible Cause)Harness or connectors
The communication line circuit between ECM and TCM (Transmission Control Module) is open or shorted.
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 1 second before conducting the next test.
WITH CONSULT
- 1Turn ignition switch "ON".
- 2Select "DATA MONITOR" mode with CONSULT.
- 3Start engine and let it idle for at least 10 seconds.
- 4If 1st trip DTC is detected, go to "Diagnostic Procedure". EC-561.
WITH GST
Follow the procedure "With CONSULT-II" above.
See also
EF & EC-561