Toyota Tacoma 2015-2018 Service Manual: Terminals Of Ecu
TERMINALS OF ECU
1. CHECK POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY
(a) for Double Cab
(1) Disconnect the P18 power window regulator master switch assembly connector.
(2) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P18-3 (B) - P18-1 (GND) |
R - W-B |
Power supply |
Always |
11 to 14 V |
|
P18-1 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction in the wire harness.
(3) Reconnect the P18 power window regulator master switch assembly connector.
(4) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P18-5 (DOWN) - P18-1 (GND) |
SB - W-B |
Power window motor DOWN output |
Ignition switch ON, power window regulator master switch assembly off |
11 to 14 V |
|
Ignition switch ON, power window regulator master switch assembly DOWN (Manual operation) |
Below 1 V |
|||
|
P18-4 (UP) - P18-1 (GND) |
L - W-B |
Power window motor UP output |
Ignition switch ON, power window regulator master switch assembly off |
11 to 14 V |
|
Ignition switch ON, power window regulator master switch assembly UP (Manual operation) |
Below 1 V |
|||
|
P18-13 (PWS) - P18-1 (GND) |
W - W-B |
P/W MAIN relay operation signal |
Ignition switch ON |
11 to 14 V |
(b) for Access Cab
(1) Disconnect the P23 power window regulator master switch assembly connector.
(2) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P23-11 (B) - P23-12 (GND) |
R - W-B |
Power supply |
Always |
11 to 14 V |
|
P23-12 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction in the wire harness.
(3) Reconnect the P18 power window regulator master switch assembly connector.
(4) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P23-15 (DOWN) - P23-12 (GND) |
SB - W-B |
Power window motor DOWN output |
Ignition switch ON, power window regulator master switch assembly off |
11 to 14 V |
|
Ignition switch ON, power window regulator master switch assembly DOWN (Manual operation) |
Below 1 V |
|||
|
P23-20 (UP) - P23-12 (GND) |
L - W-B |
Power window motor UP output |
Ignition switch ON, power window regulator master switch assembly off |
11 to 14 V |
|
Ignition switch ON, power window regulator master switch assembly UP (Manual operation) |
Below 1 V |
2. CHECK FRONT POWER WINDOW REGULATOR SWITCH ASSEMBLY RH
(a) Disconnect the P21 front power window regulator switch assembly RH connector.
(b) Measure the resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P21-7 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction in the wire harness.
(c) Reconnect the P21 front power window regulator switch assembly RH connector.
(d) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P21-2 (IG) - P21-7 (GND) |
P - W-B |
IG power supply |
Ignition switch ON |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
|||
|
P21-5 (UP) - P21-7 (GND) |
L - W-B |
Power window motor up output |
Ignition switch ON, front power window regulator switch assembly RH not pushed or pulled |
11 to 14 V |
|
Ignition switch ON, front passenger door power window moving, front power window regulator switch assembly RH pulled halfway up (Manual operation) |
Below 1 V |
|||
|
Ignition switch ON, front passenger door power window fully open |
11 to 14 V |
|||
|
Ignition switch ON, front passenger door power window moving, front power window regulator switch assembly RH fully pulled up (Auto operation) |
Below 1 V |
|||
|
Ignition switch ON, front passenger door power window fully closed |
11 to 14 V |
|||
|
P21-4 (DOWN) - P21-7 (GND) |
Y - W-B |
Power window motor down output |
Ignition switch ON, front power window regulator switch assembly RH not pushed or pulled |
11 to 14 V |
|
Ignition switch ON, front passenger door power window moving, front power window regulator switch assembly RH pushed halfway down (Manual operation) |
Below 1 V |
|||
|
Ignition switch ON, front passenger door power window fully closed |
11 to 14 V |
|||
|
Ignition switch ON, front passenger door power window moving, front power window regulator switch assembly RH fully pushed down (Auto operation) |
Below 1 V |
|||
|
Ignition switch ON, front passenger door power window fully open |
11 to 14 V |
|||
|
P21-8 (AUTO) - P21-7 (GND) |
R - W-B |
Power window motor up output |
Ignition switch ON, front passenger door power window fully open |
11 to 14 V |
|
Ignition switch ON, front passenger door power window moving, front power window regulator switch assembly RH fully pulled up (Auto operation) |
Below 1 V |
|||
|
Ignition switch ON, front passenger door power window fully closed |
11 to 14 V |
|||
|
Power window motor down output |
Ignition switch ON, front passenger door power window fully closed |
11 to 14 V |
||
|
Ignition switch ON, front passenger door power window moving, front power window regulator switch assembly RH fully pushed down (Auto operation) |
Below 1 V |
|||
|
Ignition switch ON, front passenger door power window fully open |
11 to 14 V |
If the result is not as specified, the front power window regulator switch assembly RH may have a malfunction.
3. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY LH
(a) Disconnect the P24 front power window regulator motor assembly LH connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P24-1 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
P24-2 (B) - Body ground |
R - Body ground |
Power supply |
Ignition switch ON |
11 to 14 V |
If the result is not as specified, there may be a malfunction in the wire harness.
(c) Reconnect the P24 front power window regulator motor assembly LH connector.
(d) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P24-7 (DOWN) - P24-1 (GND) |
SB - W-B |
Power window motor DOWN input |
Ignition switch ON, power window regulator master switch assembly off |
11 to 14 V |
|
Ignition switch ON, power window regulator master switch assembly DOWN (Manual operation) |
Below 1 V |
|||
|
Ignition switch ON, driver side power window fully closed |
11 to 14 V |
|||
|
Ignition switch ON, driver side power window fully DOWN (AUTO DOWN position) |
Below 1 V |
|||
|
Ignition switch ON, driver side power window fully stopped (DOWN) |
11 to 14 V |
|||
|
P24-10 (UP) - P24-1 (GND) |
L - W-B |
Power window motor UP input |
Ignition switch ON, power window regulator master switch assembly off |
11 to 14 V |
|
Ignition switch ON, power window regulator master switch assembly UP (Manual operation) |
Below 1 V |
|||
|
Ignition switch ON, driver side power window fully open |
11 to 14 V |
|||
|
Ignition switch ON, driver side power window fully UP (AUTO UP position) |
Below 1 V |
|||
|
Ignition switch ON, driver side power window fully stopped (UP) |
11 to 14 V |
If the result is not as specified, the front power window regulator motor assembly LH may have a malfunction.
4. CHECK FRONT POWER WINDOW REGULATOR MOTOR ASSEMBLY RH
(a) Disconnect the P22 front power window regulator motor assembly RH connector.
(b) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P22-1 (GND) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
|
P22-2 (B) - Body ground |
W - Body ground |
Power supply |
Ignition switch ON |
11 to 14 V |
If the result is not as specified, there may be a malfunction in the wire harness.
(c) Reconnect the P22 front power window regulator motor assembly RH connector.
(d) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
P22-4 (AUTO) - P22-1 (GND) |
R - W-B |
Power window motor AUTO UP input |
Ignition switch ON, front passenger side power window fully open |
11 to 14 V |
|
Ignition switch ON, front passenger side power window fully UP (AUTO UP position) |
Below 1 V |
|||
|
Ignition switch ON, front passenger side power window fully stopped (UP) |
11 to 14 V |
|||
|
Power window motor AUTO DOWN input |
Ignition switch ON, front passenger side power window fully closed |
11 to 14 V |
||
|
Ignition switch ON, front passenger side power window fully DOWN (AUTO DOWN position) |
Below 1 V |
|||
|
Ignition switch ON, front passenger side power window fully stopped (DOWN) |
11 to 14 V |
|||
|
P22-7 (DOWN) - P22-1 (GND) |
Y - W-B |
Power window motor DOWN input |
Ignition switch ON, front power window regulator switch assembly RH off |
11 to 14 V |
|
Ignition switch ON, front power window regulator switch assembly RH DOWN (Manual operation) |
Below 1 V |
|||
|
Ignition switch ON, front passenger side power window fully closed |
11 to 14 V |
|||
|
Ignition switch ON, front passenger side power window fully DOWN (AUTO DOWN position) |
Below 1 V |
|||
|
Ignition switch ON, front passenger side power window fully stopped (DOWN) |
11 to 14 V |
|||
|
P22-10 (UP) - P22-1 (GND) |
L - W-B |
Power window motor UP input |
Ignition switch ON, front power window regulator switch assembly RH off |
11 to 14 V |
|
Ignition switch ON, front power window regulator switch assembly RH UP (Manual operation) |
Below 1 V |
|||
|
Ignition switch ON, front passenger side power window fully open |
11 to 14 V |
|||
|
Ignition switch ON, front passenger side power window fully UP (AUTO UP position) |
Below 1 V |
|||
|
Ignition switch ON, front passenger side power window fully stopped (UP) |
11 to 14 V |
If the result is not as specified, the front power window regulator motor assembly RH may have a malfunction.
5. CHECK MAIN BODY ECU AND DRIVER SIDE JUNCTION BLOCK
(a) Remove the main body ECU.
(b) Disconnect the M6 main body ECU connector.
(c) Measure the voltage and resistance according to the value(s) in the table below.
HINT:
Measure the values on the wire harness side with the connector disconnected.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
M6-6 (FLCY) - Body ground |
Y |
Front door courtesy light switch LH input |
Driver side door Closed (off) |
10 kΩ or higher |
|
Driver side door Open (on) |
Below 1 Ω |
|||
|
M6-27 (FRCY) - Body ground |
LG |
Front door courtesy light switch RH input |
Front passenger side door Closed (off |
10 kΩ or higher |
|
Front passenger side door Open (on) |
Below 1 Ω |
|||
|
MB-11 (GND1) - Body ground |
- |
Ground |
Always |
Below 1 Ω |
|
MB-30 (ACC) - Body ground |
- |
Ignition power supply (ACC signal) |
Ignition switch ACC |
11 to 14 V |
|
Ignition switch off |
Below 1 V |
|||
|
MB-31 (BECU) - Body ground |
- |
Battery power supply |
Always |
11 to 14 V |
|
MB-32 (IG) - Body ground |
- |
Battery power supply |
Always |
11 to 14 V |
|
1D-5 (GND1) - Body ground |
W-B - Body ground |
Ground |
Always |
Below 1 Ω |
If the result is not as specified, there may be a malfunction on the wire harness side.
(d) Reinstall the main body ECU.
(e) Reconnect the M6 main body ECU connector.
(f) Measure the voltage according to the value(s) in the table below.
|
Terminal No. (Symbol) |
Wiring Color |
Terminal Description |
Condition |
Specified Condition |
|---|---|---|---|---|
|
M6-6 (FLCY) - Body ground |
Y - Body ground |
Front door courtesy light switch LH input |
Driver side door open |
Below 1 V |
|
Front door courtesy light switch LH input |
Driver side door closed |
11 to 14 V |
||
|
M6-27 (FRCY) - Body ground |
LG - Body ground |
Front door courtesy light switch RH input |
Front passenger side door open |
Below 1 V |
|
Front door courtesy light switch RH input |
Front passenger side door closed |
11 to 14 V |
If the result is not as specified, the ECU may have a malfunction.
Dtc Check / Clear
DTC CHECK / CLEAR
1. CHECK DTC
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON.
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / (desired sy ...
Data List / Active Test
DATA LIST / ACTIVE TEST
1. READ DATA LIST
HINT:
Using the Techstream to read the Data List allows the values or states of switches,
sensors, actuators and other items to be read without removing ...
Other materials:
IG2 Signal Malfunction (B2788)
DESCRIPTION
This DTC is stored when the steering lock ECU (steering lock actuator or UPR
bracket assembly) detects an IG2 power supply malfunction.
HINT:
The steering lock ECU (steering lock actuator or UPR bracket assembly) is not
connected to the CAN communication system. However, the steer ...
Skid Control Buzzer Circuit (C1A4A)
DESCRIPTION
Based on dynamic radar cruise control system operation, the forward recognition
camera provides warnings to the driver by sounding the skid control buzzer.
DTC C1A4A is stored when a malfunction is detected in the skid control buzzer
circuit.
DTC No.
Detectio ...
Front Camera Module Incorrect Axial Gap (C1AA8,C1AA9)
DESCRIPTION
If the forward recognition camera detects that the forward recognition camera
axis has deviated, DTC C1AA8 is stored. Also, if Forward Recognition Camera Axis
Adjustment is not performed after installing the forward recognition camera, DTC
C1AA9 is stored.
DTC No.
...