TERMINALS OF ECM
1. CHECK ECM
HINT:
The standard voltage at 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 inspect. The standard voltage between the terminals is shown under "Specified Condition".
Use the illustration above as a reference for the ECM terminals.
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
---|---|---|---|---|
B37-2 (NSW) - B38-12 (E1) |
B - BR |
PNP switch signal |
|
Below 1 V |
|
11 to 14 V |
|||
B36-35 (P) - B38-12 (E1) |
L - BR |
P shift position switch signal |
|
11 to 14 V |
|
Below 1 V |
|||
B36-28 (R) - B38-12 (E1) |
R - BR |
R shift position switch signal |
|
11 to 14 V |
|
Below 1 V |
|||
B36-29 (N) - B38-12 (E1) |
G - BR |
N shift position switch signal |
|
11 to 14 V |
|
Below 1 V |
|||
B36-27 (D) - B38-12 (E1) |
B - BR |
D shift position switch signal |
|
11 to 14 V |
|
Below 1 V |
|||
F50-24 (S) - B38-12 (E1) |
V - BR |
S shift position switch signal |
|
11 to 14 V |
|
Below 1 V |
|||
F50-16 (SFTU) - B38-12 (E1) |
GR - BR |
Up-shift position switch signal |
|
11 to 14 V |
|
Below 1 V |
|||
F50-22 (SFTD) - B38-12 (E1) |
LG - BR |
Down-shift position switch signal |
|
11 to 14 V |
|
Below 1 V |
|||
B37-36 (S1) - B38-12 (E1) |
L-R - BR |
S1 solenoid signal |
Ignition switch ON |
11 to 14 V |
1st or 2nd gear |
11 to 14 V |
|||
3rd, 4th or 5th gear |
Below 1 V |
|||
B36-33 (S2) - B38-12 (E1) |
L-W - BR |
S2 solenoid signal |
Ignition switch ON |
Below 1 V |
2nd or 3rd gear |
11 to 14 V |
|||
1st, 4th or 5th gear |
Below 1 V |
|||
B36-31 (SR) - B38-12 (E1) |
G-W - BR |
SR solenoid signal |
Ignition switch ON |
Below 1 V |
5th gear |
11 to 14 V |
|||
1st gear |
Below 1 V |
|||
B38-33 (SL1+) - B38-32 (SL1-) |
V - R-B |
SL1 solenoid signal |
Engine idling |
Pulse generation (See waveform 1) |
B37-31 (SL2+) - B38-34 (SL2-) |
LG - P-L |
SL2 solenoid signal |
Engine idling |
Pulse generation (See waveform 2) |
B37-34 (SLT+) - B37-35 (SLT-) |
G-Y - L-B |
SLT solenoid signal |
Engine idling |
Pulse generation (See waveform 3) |
B37-33 (SLU+) - B37-32 (SLU-) |
G-R - Y-R |
SLU solenoid signal |
4th gear (lock-up) or 5th gear (lock-up) |
Pulse generation (See waveform 4) |
B38-5 (THO1) - B37-8 (ETHW) |
B-R - W-R |
No. 1 ATF temperature sensor signal |
No. 1 ATF temperature 115°C (239°F) or higher |
Below 1.5 V |
B38-11 (THO2) - B37-8 (ETHW) |
L-Y - W-R |
No. 2 ATF temperature sensor signal |
No. 2 ATF temperature 115°C (239°F) or higher |
Below 1.5 V |
B38-9 (SP2+) - B38-10 (SP2-) |
G - R |
Speed sensor SP2 signal |
Vehicle speed 20 km/h (12 mph) |
Pulse generation (See waveform 5) |
B38-3 (NT+) - B38-4 (NT-) |
B - Y |
Speed sensor NT signal |
Engine idling (shift lever in P or N) |
Pulse generation (See waveform 6) |
F50-32 (CANH) - B38-12 (E1) |
V - BR |
CAN communication line |
Ignition switch ON |
Pulse generation (See waveform 7) |
F50-31 (CANL) - B38-12 (E1) |
W - BR |
CAN communication line |
Ignition switch ON |
Pulse generation (See waveform 8) |
(a) Using an oscilloscope, check waveform 1.
Reference
Terminal No. (Symbol) |
Tool Setting |
Condition |
---|---|---|
B38-33 (SL1+) - B38-32 (SL1-) |
5 V/DIV., 1 msec./DIV. |
Engine idling |
(b) Using an oscilloscope, check waveform 2.
Reference
Terminal No. (Symbol) |
Tool Setting |
Condition |
---|---|---|
B37-31 (SL2+) - B38-34 (SL2-) |
5 V/DIV., 1 msec./DIV. |
Engine idling |
(c) Using an oscilloscope, check waveform 3.
Reference
Terminal No. (Symbol) |
Tool Setting |
Condition |
---|---|---|
B37-34 (SLT+) - B37-35 (SLT-) |
5 V/DIV., 1 msec./DIV. |
Engine idling |
(d) Using an oscilloscope, check waveform 4.
Reference
Terminal No. (Symbol) |
Tool Setting |
Condition |
---|---|---|
B37-33 (SLU+) - B37-32 (SLU-) |
5 V/DIV., 1 msec./DIV. |
4th gear (lock-up) or 5th gear (lock-up) |
(e) Using an oscilloscope, check waveform 5.
Reference
Terminal No. (Symbol) |
Tool Setting |
Condition |
---|---|---|
B38-9 (SP2+) - B38-10 (SP2-) |
2 V/DIV., 20 msec./DIV. |
Vehicle speed 20 km/h (12 mph) |
(f) Using an oscilloscope, check waveform 6.
Reference
Terminal No. (Symbol) |
Tool Setting |
Condition |
---|---|---|
B38-3 (NT+) - B38-4 (NT-) |
1 V/DIV., 2 msec./DIV. |
Engine idling (shift lever in P or N) |
(g) Using an oscilloscope, check waveform 7.
Reference
Terminal No. (Symbol) |
Tool Setting |
Condition |
---|---|---|
F50-32 (CANH) - B38-12 (E1) |
1 V/DIV., 10 μsec./DIV. |
Ignition switch ON |
(h) Using an oscilloscope, check waveform 8.
Reference
Terminal No. (Symbol) |
Tool Setting |
Condition |
---|---|---|
F50-31 (CANL) - B38-12 (E1) |
1 V/DIV., 10 μsec./DIV. |
Ignition switch ON |
Reservoir Level Switch Disconnected (C1453,C1454)
DESCRIPTION
The brake fluid level warning switch sends the appropriate signal to the skid
control ECU when the brake fluid level drops.
DTC Code
DTC Detection Condition
Trouble Area
C1453
With th ...
Open in One Side of CAN Branch Line
DESCRIPTION
If 2 or more ECUs and/or sensors do not appear on the Techstream "CAN Bus Check"
screen, one side of the CAN branch wire may be open (one side of the CANH [branch
wire]/CANL [branch wire] of the ECU and/or sensor is open).
...