Terminals Of ECM [03/2024 - ]
WARNING: This page is about a different car, the 2025 Lexus NX 350, 2024 Lexus NX 350, 2023 Lexus NX 350, and 2022 Lexus NX 350. However, it is still accessible from the selected car via links, so may be relevant.
- ECM
HINT:
The standard voltage and resistance of each ECM terminal is shown in the table below.
In the table, first follow the information under "Condition". Look under "Terminal No. (Symbol)" for the terminals to be inspected. The standard voltage or resistance between the terminals is shown under "Specified Condition".
Use the illustration above as a reference for the ECM terminals.
Terminal No. (Symbol) Terminal Description Condition Specified Condition A19-9 (E1) - Body ground Ground Always Below 1 Ω A19-14 (STP) - A19-9 (E1) Stop light switch signal Brake pedal depressed 7.5 to 14 V Brake pedal released Below 1 V A19-16 (STA) - A19-9 (E1) Starter signal Cranking (shift state park (P) or neutral (N), ignition switch ON (START)) 11 to 14 V Ignition switch ON and shift state park (P) or park (N) Below 2 V A19-25 (CANL) - A19-9 (E1) CAN communication line Ignition switch ON Pulse generation A19-26 (CANH) - A19-9 (E1) CAN communication line Ignition switch ON Pulse generation A19-28 (PWMS) - A19-9 (E1) Combination switch (SPORT) signal Ignition switch ON and combination switch (SPORT) being pushed and held Below 1.5 V Ignition switch ON and combination switch (SPORT) not pushed 11 to 14 V A19-29 (SPCN) - A19-9 (E1) Combination switch (NORMAL) signal Ignition switch ON and combination switch (NORMAL) being pushed and held Below 1.5 V Ignition switch ON and combination switch (NORMAL) not pushed 11 to 14 V A19-30 (SFTD) - A19-47 (EPPM) Down-shift switch signal Ignition switch ON 11 to 14 V Ignition switch ON and "-" (Down shift) shift paddle switch operated Below 1 V A19-31 (SFTU) - A19-47 (EPPM) Up-shift switch signal Ignition switch ON 11 to 14 V Ignition switch ON and "+" (Up shift) shift paddle switch operated Below 1 V A19-62 (SBFS) - A19-9 (E1) Electronic shift lever signal Ignition switch ON Pulse generation B51-1 (BATT) - A19-9 (E1) Battery (for measuring battery voltage and for ECM memory) Always 11 to 14 V B51-11(+B2) - A19-9 (E1) Power source of ECM Ignition switch ON 11 to 14 V B51-12(+B) - A19-9 (E1) Power source of ECM Ignition switch ON 11 to 14 V B51-17 (SL5+) - B51-18 (SL5-) Solenoid (SL5) valve signal 2nd or 8th gear selected Pulse generation B51-19 (SL3+) - B51-20 (SL3-) Solenoid (SL3) valve signal 3rd, 7th or Reverse gear selected Pulse generation B51-26 (SLT+) - B51-25 (SLT-) Solenoid (SLT) valve signal Engine idling Pulse generation B51-28 (SL6+) - B51-27 (SL6-) Solenoid (SL6) valve signal 1st or Reverse gear selected Pulse generation B51-29 (SL4+) - B51-30 (SL4-) Solenoid (SL4) valve signal 4th or 6th gear selected Pulse generation B51-31 (SL2+) - B51-32 (SL2-) Solenoid (SL2) valve signal 5th, 6th, 7th or 8th gear selected Pulse generation B51-33 (SL1+) - B51-34 (SL1-) Solenoid (SL1) valve signal 1st, 2nd, 3rd, 4th or 5th gear selected Pulse generation B51-35 (SLU+) - B51-36 (SLU-) Solenoid (SLU) valve signal Lock-up ON Pulse generation B51-40 (THO1) - B51-41 (ETHO) ATF temperature sensor signal ATF temperature 115°C (239°F) or higher Below 1.5 V B51-42 (SL) - A19-9 (E1) Solenoid (SL) valve signal - Shift state park (P), reverse (R) or neutral (N)
- Lock-up OFF (shift state drive (D))
11 to 14 V B51-48 (CAN-) - A19-9 (E1) CAN communication line Ignition switch ON Pulse generation B51-49 (CAN+) - A19-9 (E1) CAN communication line Ignition switch ON Pulse generation B51-51 (NCO) - A19-9 (E1) Transmission Revolution Sensor (NC) signal Vehicle being driven Pulse generation B51-52 (NCB) - A19-9 (E1) Power source for sensor
(specific voltage)Ignition switch ON 11 to 14 V B51-53 (NTO) - A19-9 (E1) Transmission Revolution Sensor (NT) signal Engine idling (shift state park (P) or neutral (N)) Pulse generation B51-54 (NTB) - A19-9 (E1) Power source for sensor
(specific voltage)Ignition switch ON 11 to 14 V