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:
Road Test
ROAD TEST
PROBLEM SYMPTOM CONFIRMATION
HINT:
The dynamic radar cruise control system has 2 cruise control modes:
constant speed control mode and vehicle-to-vehicle distance control mode.
Vehicle-to-vehicle distance control mode is selected by default when
the dyna ...
Torque Converter Clutch Circuit Short to Battery or Open (P074015)
DESCRIPTION
Shift solenoid valve SL is turned on and off by signals from the ECM to control
the hydraulic pressure acting on the lock-up relay valve, which then controls operation
of the lock-up clutch.
DTC No.
DTC Detection Condition
Trouble Area
SA ...
Open in Bus 5 Main Bus Line
DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance
between terminals 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway
ECU) is 70 Ω or higher.
Detection Item
Trouble Area
Resistance between ter ...
