TERMINALS OF ECU
1. TCM
HINT:
Each TCM terminal standard voltage 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 between the terminals is shown under "Specified Condition".
Use the illustration above as a reference for the TCM terminals.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
B40-15 (R) - B40-8 (E1) |
G - B |
R shift position switch signal |
Ignition switch ON and shift lever in R |
11 to 14 V |
Ignition switch ON and shift lever in any position except R |
Below 1 V |
|||
B40-16 (D) - B40-8 (E1) |
LG - B |
D shift position switch signal |
Ignition switch ON and shift lever in D and S |
11 to 14 V |
Ignition switch ON and shift lever in any position except D and S |
Below 1 V |
|||
B40-12 (STP) - B40-8 (E1) |
P - B |
Stop light switch signal |
Brake pedal is depressed |
7.5 to 14 V |
Brake pedal is released |
Below 1.5 V |
|||
B40-11 (NSW) - B40-8 (E1) |
GR - B |
Park/neutral switch signal |
Ignition switch ON and shift lever in P or N |
Below 2 V |
Ignition switch ON and shift lever in any position except P or N |
11 to 14 V |
|||
B40-10 (STA) - B40-8 (E1) |
V - B |
Starter signal |
Cranking (shift lever in P or N, engine switch START) |
11 to 14 V |
Ignition switch ON and shift lever in any position except P or N |
Below 2 V |
|||
B40-3 (SPD) - B40-8 (E1) |
L - B |
Speed signal from combination meter |
Vehicle speed 20 km/h (12 mph) |
Pulse generation (see waveform 1) |
B40-1 (BATT) - B40-8 (E1) |
W-L - B |
Battery (for measuring battery voltage and for TCM memory) |
Always |
9 to 14 V |
B40-13 (IGSW) - B40-8 (E1) |
Y - B |
Ignition switch |
Ignition switch ON |
9 to 14 V |
B40-18 (+B) - B40-8 (E1) |
Y - B |
Power source of TCM |
Ignition switch ON |
9 to 14 V |
B40-6 (CAN+) - B40-8 (E1) |
R - B |
CAN communication line |
Ignition switch ON |
Pulse generation (see waveform 2) |
B40-7 (CAN-) - B40-8 (E1) |
W - B |
CAN communication line |
Ignition switch ON |
Pulse generation (see waveform 3) |
(a) Waveform 1
Reference
Terminal |
SPD - E1 |
Tool setting |
2 V/DIV., 20 ms./DIV. |
Vehicle condition |
Vehicle speed 20 km/h (12 mph) |
(b) Waveform 2
Reference
Terminal |
CAN+ - E1 |
Tool setting |
1 V/DIV., 10 ms./DIV. |
Vehicle condition |
Engine is stopped, ignition switch ON |
(c) Waveform 3
Reference
Terminal |
CAN- - E1 |
Tool setting |
1 V/DIV., 10 ms./DIV. |
Vehicle condition |
Engine is stopped, ignition switch ON |
2. ECM
HINT:
Each ECM terminal standard voltage 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 between the terminals is shown under "Specified Condition".
Use the illustration below as a reference for the ECM terminals.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
A41-25 (S) - B39-81 (E1) |
BE - W |
S shift position switch signal |
Ignition switch ON and shift lever in S |
11 to 14 V |
Ignition switch ON and shift lever in any position except S |
Below 1 V |
|||
A41-38 (SFTU) - B39-81 (E1) |
R - W |
Up shift switch signal |
Ignition switch ON and shift lever in S |
11 to 14 V |
Ignition switch ON and shift lever in "+" (Up shift) |
Below 1 V |
|||
A41-27 (SFTD) - B39-81 (E1) |
LG - W |
Down shift switch signal |
Ignition switch ON and shift lever in S |
11 to 14 V |
Ignition switch ON and shift lever in "-" (Down shift) |
Below 1 V |
Problem Symptoms Table
PROBLEM SYMPTOMS TABLE
Use the table below to help determine the cause of problem symptoms. If multiple
suspected areas are listed, the potential causes of the symptoms are listed in order
of probability in the "Suspected Area" column of the tab ...
Erasing the entire HomeLink® memory (all three programs)
Press and hold the 2 outside buttons for 10 seconds (or 20 seconds depending
on the model) until the indicator light flashes.
If you sell your vehicle, be sure to erase the programs stored in the HomeLink®
memory.
- Before programming
• Insta ...
Center Airbag Sensor Assembly Malfunction (B1000/31)
DESCRIPTION
The center airbag sensor assembly consists of a deceleration sensor, safing sensor,
drive circuit, diagnosis circuit, ignition control, etc.
If the center airbag sensor assembly receives signals from the deceleration sensor,
it determines whe ...