Lexus ES manuals

Lexus ES: Terminals Of Ecu

TERMINALS OF ECU

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

(a) Disconnect the MB main body ECU (multiplex network body ECU) connector.

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(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 connectors disconnected.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

MB-11 (GND1) - Body ground

-

Ground

Always

Below 1 Ω

MB-31 (BECU) - Body ground

-

Battery power supply

Always

11 to 14 V

MB-30 (ACC) - Body ground

-

ACC power supply

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

MB-32 (IG) - Body ground

-

IG power supply

Engine switch on (IG)

11 to 14 V

Engine switch off

Below 1 V

(c) Reconnect the MB main body ECU (multiplex network body ECU) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

3D-25 - Body ground

BE - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

3D-17 - Body ground

L - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (DRIVER DOOR)

(a) Disconnect the J27 power window regulator motor assembly (driver door) 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

J27-2 (B) - Body ground

GR - Body ground

Battery power supply

Always

11 to 14 V

J27-1 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the J27 power window regulator motor assembly (driver door) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J27-9 (LIN) - Body ground

G - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (FRONT PASSENGER DOOR)

(a) Disconnect the J5 power window regulator motor assembly (front passenger door) 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

J5-2 (B) - Body ground

GR - Body ground

Battery power supply

Always

11 to 14 V

J5-1 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the J5 power window regulator motor assembly (front passenger door) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J5-9 (LIN) - Body ground

P - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR RH DOOR)

(a) Disconnect the L4 power window regulator motor assembly (rear RH door) 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

L4-2 (B) - Body ground

B - Body ground

Battery power supply

Always

11 to 14 V

L4-1 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the L4 power window regulator motor assembly (rear RH door) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

L4-9 (LIN) - Body ground

P - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK POWER WINDOW REGULATOR MOTOR ASSEMBLY (REAR LH DOOR)

(a) Disconnect the L10 power window regulator motor assembly (rear LH door) 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

L10-2 (B) - Body ground

B - Body ground

Battery power supply

Always

11 to 14 V

L10-1 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the L10 power window regulator motor assembly (rear LH door) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

L10-9 (LIN) - Body ground

P - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY

(a) Disconnect the J20 multiplex network master switch assembly 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

J20-11 (B) - Body ground

LA-R - Body ground

Battery power supply

Always

11 to 14 V

J20-12 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the J20 multiplex network master switch assembly connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

J20-17 (LIN1) - Body ground

P - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR SUB-ASSEMBLY) (w/ Sliding Roof System)

(a) Disconnect the P22 sliding roof ECU (sliding roof drive gear sub-assembly) 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 (B) - Body ground

B - Body ground

Battery power supply

Always

11 to 14 V

P22-2 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the P22 sliding roof ECU (sliding roof drive gear sub-assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

P22-7 (MPX1) - Body ground

LA-P - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK SLIDING ROOF ECU (SLIDING ROOF DRIVE GEAR ASSEMBLY) (w/ Panoramic Moon Roof System)

(a) Disconnect the Q1 sliding roof ECU (sliding roof drive gear assembly) 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

Q1-1 (B) - Body ground

L - Body ground

Battery power supply

Always

11 to 14 V

Q1-2 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the Q1 sliding roof ECU (sliding roof drive gear assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

Q1-7 (MPX1) - Body ground

B - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK KICK DOOR CONTROL SENSOR (w/ Power Trunk Lid System)

(a) Disconnect the S5 kick door control sensor connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

S5-1 (B) - Body ground

B - Body ground

Battery power supply

Always

11 to 14 V

S5-4 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the S5 kick door control sensor connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

S5-2 (LIN) - Body ground

G - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

(a) Disconnect the G47 certification ECU (smart key ECU assembly) 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

G47-4 (+B) - Body ground

W - Body ground

Battery power supply

Always

11 to 14 V

G47-18 (E) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the G47 certification ECU (smart key ECU assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G47-13 (LIN) - Body ground

B - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK STEERING LOCK ECU (STEERING LOCK ACTUATOR OR UPPER BRACKET ASSEMBLY)

(a) Disconnect the G51 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

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

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G51-7 (B) - Body ground

W - Body ground

Battery power supply

Always

11 to 14 V

G51-1 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

(c) Reconnect the G51 steering lock ECU (steering lock actuator or upper bracket assembly) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G51-5 (LIN) - Body ground

B - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

CHECK ID CODE BOX (IMMOBILISER CODE ECU)

(a) Disconnect the G52 ID code box (immobiliser code ECU) 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

G52-5 (GND) - Body ground

W-B - Body ground

Ground

Always

Below 1 Ω

G52-1 (+B) - Body ground

G - Body ground

+B power supply

Always

11 to 14 V

(c) Reconnect the G52 ID code box (immobiliser code ECU) connector.

(d) Check for pulses according to the value(s) in the table below.

Terminal No. (Symbol)

Wiring Color

Terminal Description

Condition

Specified Condition

G52-2 (LIN1) - Body ground

B - Body ground

LIN communication line

Engine switch on (IG)

Pulse generation

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