Toyota Tundra Service Manual: Terminals Of Ecu

TERMINALS OF ECU

1. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Disconnect the N14 outer mirror control ECU assembly LH connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

N14-5 (SIG) - N14-7 (GND)

P - W-B

Ignition power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

N14-6 (CPUB) - N14-7 (GND)

G - W-B

Battery power supply

Always

11 to 14 V

N14-14 (BDR) - N14-7 (GND)

P - W-B

Battery power supply

Always

11 to 14 V

N14-7 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the N14 outer mirror control ECU assembly LH connector.

(d) Measure the voltage according to the value(s) in the table below.

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

N13-3 (MR+) - Body ground

SB - Body ground

Mirror retract motor output (retracting)

  • Ignition switch ACC
  • Outer rear view mirror assembly LH being retracted

11 to 14 V

N13-11 (MR-) - Body ground

R - Body ground

Mirror retract motor output (returning)

  • Ignition switch ACC
  • Outer rear view mirror assembly LH stopped

Below 1 V

N13-1 (LMVR) - Body ground

G - Body ground

Mirror motor drive voltage

  • Ignition switch ACC
  • Mirror surface stopped

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving downward or left

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving upward

11 to 14 V

N13-9 (LMHR) - Body ground

B - Body ground

Mirror motor drive voltage

  • Ignition switch ACC
  • Mirror surface stopped

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving upward or right

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving left

11 to 14 V

N13-10 (LM+R) - Body ground

G - Body ground

Mirror motor drive voltage

  • Ignition switch ACC
  • Mirror surface stopped

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving upward or left

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving downward or right

11 to 14 V

N13-5 (LVC) - N13-14 (LE1)

G - SB

Mirror position sensor power supply

Ignition switch ON

4.5 to 5.5 V

Ignition switch off

Below 1 V

N13-6 (VSSR) - Body ground

L - Body ground

Vertical direction position sensor signal

  • Ignition switch ACC
  • Mirror surface moving upward or downward

Changes within range of 0 to 5 V

N13-13 (HSSR) - Body ground

W - Body ground

Horizontal direction position sensor signal

  • Ignition switch ACC
  • Mirror surface moving left or right

Changes within range of 0 to 5 V

N14-2 (M1) - N14-7 (GND)

P - W-B

Seat memory switch M1 signal

  • Ignition switch ON
  • Seat memory switch M1 off

11 to 14 V

  • Ignition switch ON
  • Seat memory switch M1 on

Below 1 V

N14-3 (M2) - N14-7 (GND)

BE - W-B

Seat memory switch M2 signal

  • Ignition switch ON
  • Seat memory switch M2 off

11 to 14 V

  • Ignition switch ON
  • Seat memory switch M2 on

Below 1 V

N14-1 (MM) - N14-7 (GND)

L - W-B

Seat memory switch SET signal

  • Ignition switch ON
  • Seat memory switch SET off

11 to 14 V

  • Ignition switch ON
  • Seat memory switch SET on

Below 1 V

2. CHECK OUTER MIRROR CONTROL ECU ASSEMBLY RH

(a) Disconnect the M13 outer mirror control ECU assembly RH connector.

(b) Measure the voltage and resistance according to the value(s) in the table below.

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

M13-5 (SIG) - M13-7 (GND)

P - W-B

Ignition power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

M13-6 (CPUB) - M13-7 (GND)

G - W-B

Battery power supply

Always

11 to 14 V

M13-14 (BDR) - M13-7 (GND)

V - W-B

Battery power supply

Always

11 to 14 V

M13-7 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the M13 outer mirror control ECU assembly RH connector.

(d) Measure the voltage according to the value(s) in the table below.

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

M12-3 (MR+) - Body ground

P - Body ground

Mirror retract motor output (retracting)

  • Ignition switch ACC
  • Outer rear view mirror assembly RH being retracted

11 to 14 V

  • Ignition switch ACC
  • Outer rear view mirror assembly RH stopped

Below 1 V

M12-11 (MR-) - Body ground

R - Body ground

Mirror retract motor output (returning)

  • Ignition switch ACC
  • Outer rear view mirror assembly LH retuning

11 to 14 V

  • Ignition switch ACC
  • Outer rear view mirror assembly LH stopped

Below 1 V

M12-1 (RMVR) - Body ground

L - Body ground

Mirror motor drive voltage

  • Ignition switch ACC
  • Mirror surface stopped

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving downward or left

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving upward

11 to 14 V

M12-9 (RMHR) - Body ground

B - Body ground

Mirror motor drive voltage

  • Ignition switch ACC
  • Mirror surface stopped

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving upward or right

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving left

11 to 14 V

M12-10 (RM+R) - Body ground

BE - Body ground

Mirror motor drive voltage

  • Ignition switch ACC
  • Mirror surface stopped

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving upward or left

Below 1 V

  • Ignition switch ACC
  • Mirror surface moving downward or right

11 to 14 V

M12-5 (RVC) - M12-14 (RE1)

G - SB

Mirror position sensor power supply

Ignition switch ON

4.5 to 5.5 V

Ignition switch off

Below 1 V

M12-6 (VSSR) - Body ground

L - Body ground

Vertical direction position sensor signal

  • Ignition switch ACC
  • Mirror surface moving upward or downward

Changes within range of 0 to 5 V

M12-13 (HSSR) - Body ground

W - Body ground

Horizontal direction position sensor signal

  • Ignition switch ACC
  • Mirror surface moving left or right

Changes within range of 0 to 5 V

*1

Main Body ECU (Multiplex Network Body ECU)

-

-

3. CHECK DRIVER SIDE JUNCTION BLOCK ASSEMBLY AND MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

(a) Remove the main body ECU (multiplex network body ECU) from the driver side junction block assembly.

Click here

(b) Connect the driver side junction block assembly connectors.

(c) Measure the voltage and resistance according to the value(s) in the table below.

Terminal No.

(Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

A-32 (IG) - Body ground

None - Body ground

Ignition power supply

Ignition switch ON

11 to 14 V

Ignition switch off

Below 1 V

A-30 (ACC) - Body ground

None - Body ground

ACC power supply

Ignition switch ACC

11 to 14 V

Ignition switch off

Below 1 V

A-31 (BECU) - Body ground

None - Body ground

Battery power supply

Always

11 to 14 V

A-11 (GND1) - Body ground

None - Body ground

Body ground

Always

Below 1 Ω

(d) Install the main body ECU (multiplex network body ECU) to the driver side junction block assembly.

Click here

(e) Measure the voltage according to the value(s) in the table below.

Terminal No.

(Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J163-14 (RET) - 3I-3

V - BR

Mirror retract motor output (retracting)

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror retract switch) on

Below 1 V

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror retract switch) off

11 to 14 V

J164-4 (MIRB) - J164-6 (MIRE)

R - GR

Mirror control switch signal

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror control switch) right

Below 2.7 V

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror control switch) left

Below 4 V

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror control switch) down

Below 3.5 V

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror control switch) up

Below 1.7 V

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror control switch) not pushed

11 to 14 V

J164-5 (MIRS) - J164-6 (MIRE)

L - GR

Mirror master switch signal

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror master switch) L

11 to 14 V

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror master switch) R

Below 2 V

  • Ignition switch ACC
  • Outer mirror switch assembly (mirror master switch) neutral

Below 1 V

    System Diagram

    Power Mirror Control System(w/o Memory)

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