Toyota Tacoma manuals

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

(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

(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.

(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

(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

(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.

(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.

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