Last Modified: 08-21-2023 6.11:8.1.0 Doc ID: RM100000001AZJ3
Model Year Start: 2019 Model: Avalon Prod Date Range: [04/2018 -           ]
Title: MIRROR (EXT): POWER MIRROR CONTROL SYSTEM (for Gasoline Model with Memory): TERMINALS OF ECU; 2019 - 2022 MY Avalon [04/2018 -        ]

TERMINALS OF ECU

CHECK OUTER MIRROR CONTROL ECU ASSEMBLY LH

(a) Disconnect the I21 outer mirror control ECU 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

I21-14 (BDR) - Body ground

GR - Body ground

+B power supply

Always

11 to 14 V

I21-6 (CPUB) - Body ground

LA-L - Body ground

+B power supply

Always

11 to 14 V

I21-5 (SIG) - Body ground

LA-B - Body ground

Ignition power supply

Engine switch off → on (IG)

Below 1 V → 11 to 14 V

I21-7 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the I21 outer mirror control ECU 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

I22-1 (LMVR) - I22-10 (LM+R)

BR - V

Vertical mirror motor drive voltage

Driver door mirror surface moving upward → stopped

11 to 14 V → Below 1 V

I22-10 (LM+R) - I22-1 (LMVR)

V - BR

Vertical mirror motor drive voltage

Driver door mirror surface moving downward → stopped

11 to 14 V → Below 1 V

I22-10 (LM+R) - I22-9 (LMHR)

V - LG

Horizontal mirror motor drive voltage

Driver door mirror surface moving right → stopped

11 to 14 V → Below 1 V

I22-9 (LMHR) - I22-10 (LM+R)

LG - V

Horizontal mirror motor drive voltage

Driver door mirror surface moving left → stopped

11 to 14 V → Below 1 V

I22-5 (LVC) - I22-14 (LE1)

G - BR

Mirror position sensor power supply

Engine switch on (IG)

4.55 to 5.45 V

Engine switch off

Below 1 V

I22-6 (VSSR) - I21-7 (GND)

V - W-B

Mirror position sensor signal

Engine switch on (IG)

0 to 5 V

I22-13 (HSSR) - I21-7 (GND)

GR - W-B

Mirror position sensor signal

Engine switch on (IG)

0 to 5 V

I22-4 (HTR+) - I22-12 (RTN)

LG - W

Mirror heater drive voltage
  • Engine switch on (IG)
  • Mirror heater switch (rear window defogger switch) on

11 to 14 V

I21-3 (M2) - I21-7 (GND)

R - W-B

M2 switch signal for seat memory switch

M2 switch on

Below 1 V

M2 switch off

11 to 14 V

I21-2 (M1) - I21-7 (GND)

BR - W-B

M1 switch signal for seat memory switch

M1 switch on

Below 1 V

M1 switch off

11 to 14 V

I21-1 (MM) - I21-7 (GND)

GR - W-B

SET switch signal for seat memory switch

SET switch on

Below 1 V

SET switch off

11 to 14 V

CHECK OUTER MIRROR CONTROL ECU ASSEMBLY RH

(a) Disconnect the I5 outer mirror control ECU 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

I5-14 (BDR) - Body ground

GR - Body ground

+B power supply

Always

11 to 14 V

I5-6 (CPUB) - Body ground

LA-L - Body ground

+B power supply

Always

11 to 14 V

I5-5 (SIG) - Body ground

LA-B - Body ground

Ignition power supply

Engine switch off → on (IG)

Below 1 V → 11 to 14 V

I5-7 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the I5 outer mirror control ECU 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

I6-1 (RMVR) - I6-10 (RM+R)

BR - V

Vertical mirror motor drive voltage

Front passenger door mirror surface moving upward → stopped

11 to 14 V → Below 1 V

I6-10 (RM+R) - I6-1 (RMVR)

V - BR

Vertical mirror motor drive voltage

Front passenger door mirror surface moving downward → stopped

11 to 14 V → Below 1 V

I6-10 (RM+R) - I6-9 (RMHR)

V - LG

Horizontal mirror motor drive voltage

Front passenger door mirror surface moving right → stopped

11 to 14 V → Below 1 V

I6-9 (RMHR) - I6-10 (RM+R)

LG - V

Horizontal mirror motor drive voltage

Front passenger door mirror surface moving left → stopped

11 to 14 V → Below 1 V

I6-5 (RVC) - I6-14 (RE1)

G - BR

Mirror position sensor power supply

Engine switch on (IG)

4.55 to 5.45 V

Engine switch off

Below 1 V

I6-6 (VSSR) - I5-7 (GND)

V - W-B

Mirror position sensor signal

Engine switch on (IG)

0 to 5 V

I6-13 (HSSR) - I5-7 (GND)

GR - W-B

Mirror position sensor signal

Engine switch on (IG)

0 to 5 V

I6-4 (HTR+) - I6-12 (RTN)

LG - W

Mirror heater drive voltage
  • Engine switch on (IG)
  • Mirror heater switch (rear window defogger switch) on

11 to 14 V

CHECK MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) AND INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY

(a) Disconnect the instrument panel junction block assembly and main body ECU (multiplex network body ECU) connectors.

Click here 2019 - 2021 MY Avalon Avalon HV [04/2018 - 08/2021]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL 2022 MY Avalon Avalon HV [08/2021 -        ]; POWER DISTRIBUTION: MAIN BODY ECU: REMOVAL

(b) Reconnect the instrument panel junction block assembly connectors.

(c) Measure the resistance and voltage 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

MB-31 (BECU) - Body ground

-

Battery power supply

Always

11 to 14 V

MB-32 (IG) - Body ground

-

Ignition power supply (IG signal)

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

MB-30 (ACC) - Body ground

-

Ignition power supply (ACC signal)

Engine switch on (ACC)

11 to 14 V

Engine switch off

Below 1 V

MB-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

G32-19 (GND2) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(d) Connect the main body ECU (multiplex network body ECU) connectors.

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

Tester Connection

Wiring Color

Terminal Description

Condition

Specified Condition

G34-7 (MIRB) - G34-9 (MIRE)

L - W

Mirror surface adjust switch signal
  • Engine switch on (ACC)
  • Mirror surface adjust switch up

Below 1.7 V
  • Engine switch on (ACC)
  • Mirror surface adjust switch right

Below 2.7 V
  • Engine switch on (ACC)
  • Mirror surface adjust switch down

Below 3.5 V
  • Engine switch on (ACC)
  • Mirror surface adjust switch left

Below 4 V
  • Engine switch on (ACC)
  • Mirror surface adjust switch off

3.8 to 5 V

G34-8 (MIRS) - G34-9 (MIRE)

GR - W

Mirror select switch signal
  • Engine switch on (ACC)
  • Mirror select switch L

Below 2 V
  • Engine switch on (ACC)
  • Mirror select switch R

Below 1 V
  • Engine switch on (ACC)
  • Mirror select switch off

3.8 to 5.0 V