Toyota Tundra. Manual — part 415

TERMINALS OF ECU

1. CHECK COMBINATION METER

Fig. 18: Identifying J28 ECU Connector Terminal
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

not sound

TABLE

Replace combination meter

COMBINATION METER

Parking brake unreleased warning
buzzer does not sound

Parking brake system

PARKING BRAKE SYSTEM

Replace combination meter

COMBINATION METER

Door ajar driving warning buzzer
does not sound

Replace combination meter

COMBINATION METER

Sequential shift reject buzzer
(which sounds twice) does not
sound

Automatic transmission system
(A750E) (for 1GR-FE)

AUTOMATIC TRANSMISSION
SYSTEM (FOR 1GR-FE)

Automatic transmission system
(A750E) (for 2UZ-FE)

AUTOMATIC TRANSMISSION
SYSTEM (FOR 2UZ-FE)

Automatic transmission system
(AB60F) (for 3UR-FE)*2

PROBLEM SYMPTOMS
TABLE

Automatic transmission system
(AB60E) (for 3UR-FE)

PROBLEM SYMPTOMS TABLE

Automatic transmission system
(A750F)

AUTOMATIC TRANSMISSION
SYSTEM

Replace combination meter

COMBINATION METER

4WD buzzer (which sounds
continuously) does not sound*2

Replace combination meter

COMBINATION METER

4WD buzzer (which sounds 3
times) does not sound*2

Replace combination meter

COMBINATION METER

Key reminder buzzer (which
sounds continuously) does not
sound

Key reminder warning system

KEY REMINDER WARNING
SYSTEM

Replace combination meter

COMBINATION METER

HINT:
*1: w/ Multi-information display
*2: for 4WD

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Meter - Tundra

VOLTAGE SPECIFICATIONS

Terminal No.

(Symbols)

Wiring

Color

Terminal

Description

Condition

Specified

Condition

J28-1 (RHIG) -

Body ground

W - Body

ground

Power source for light

control rheostat

Ignition switch ON

4.6 to 5.4 V

J28-2 (TR) -

Body ground

LG - Body

ground

Light control rheostat

knob input

Light control rheostat

knob fully turned

downward

Below 1 ohms

Light control rheostat

knob fully turned upward

10 kohms or higher

J28-3 (E2) -

Body ground

G - Body

ground

Light control rheostat

switch ground

Always

Below 1 ohms

J28-5 (CHK) -

Body ground

R - Body

ground

MIL input signal

Ignition switch ON, MIL

ON

Below 3 V

Ignition switch OFF, MIL

OFF

11 to 14 V

J28-6 (SW) -

Body ground*1

Y - Body

ground

RSCA OFF indicator

light input signal

Ignition switch ON,

RSCA OFF indicator

light ON

Below 1 V

Ignition switch ON,

RSCA OFF indicator

light OFF

8 to 14 V

J28-7 (TIRE) -

Body ground

LG - Body

ground

Tire pressure warning

light input signal

Ignition switch ON, tire

pressure warning light

ON

Below 1.5 V

Ignition switch ON, tire

pressure warning light

OFF

8 V or higher

J28-9- (CHG) -

Body ground

B - Body

ground

CHARGE warning

light

Ignition switch ON,

CHARGE warning light

ON

Below 1 V

Ignition switch ON,

CHARGE warning light

OFF

11 to 14 V

J28-10 (WLVL)

- Body ground

P - Body

ground

Washer level warning

light

Ignition switch ON,

washer level warning

light ON

Below 1 V

Ignition switch ON,

washer level warning

light OFF

11 to 14 V

J28-11 (S) -

Body ground

BR - Body

ground

Oil pressure warning

light

Ignition switch ON, oil

pressure warning light

ON

Below 1 V

Ignition switch ON, oil

pressure warning light

11 to 14 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Meter - Tundra

OFF

J28-12 (L) -

J28-39 (E3)

V-Y

Fuel sender gauge

Ignition switch ON, fuel

sender gauge ON

Below 1 V

Ignition switch ON, fuel

sender gauge OFF

Below 11 to 14 V

J28-14 (SW) -

Body ground

Y - Body

ground

Brake fluid level

warning light signal

Ignition switch ON,

BRAKE warning light

ON

Below 1 V

Ignition switch ON,

BRAKE warning light

OFF

11 to 14 V

J28-16 (B) -

Body ground

B - Body

ground

Turn signal L

Ignition switch ON, turn

signal switch neutral

position

Below 1 V

Ignition switch ON, turn

signal switch turned to

left

Alternating between

below 1 and 11 to

14 V

J28-17 (B) -

Body ground

G - Body

ground

Turn signal R

Ignition switch ON, turn

signal switch neutral

position

Below 1

Ignition switch ON, turn

signal switch turned to

right

Alternating between

below 1 and 11 to

14 V

J28-18 (B) -

Body ground

LG - Body

ground

Power source

Always

11 to 14 V

J28-20 (IG+) -

Body ground

P - Body

ground

Ignition switch signal

Ignition switch OFF

Below 1 V

Ignition switch ON

11 to 14 V

J28-23 (P) -

Body ground

O - Body

ground

A/T shift position

signal P

Ignition switch ON, shift
lever is except P position

Below 1 V

Ignition switch ON, shift

lever is P position

11 to 14 V

J28-24 (R) -

Body ground

V - Body

ground

A/T shift position

signal R

Ignition switch ON, shift

lever is except R position

Below 1 V

Ignition switch ON, shift

lever is R position

11 to 14 V

J28-25 (N) -

Body ground

L - Body

ground

A/T shift position

signal N

Ignition switch ON, shift

lever is except N position

Below 1 V

Ignition switch ON, shift

lever is N position

11 to 14 V

J28-26 (D) -

Body ground

G - Body

ground

A/T shift position

signal D

Ignition switch ON, shift

lever is except D position

Below 1 V

Ignition switch ON, shift

lever is D position

11 to 14 V

Ignition switch ON, shift
lever is except S position

Below 1 V

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Meter - Tundra

If the result is not as specified, the meter may have a malfunction.

2. CHECK ACCESSORY METER

J28-27 (4) -

Body ground

P - Body

ground

A/T shift position

signal S

Ignition switch ON, shift

lever is S position

11 to 14 V

J28-28 (A/B) -

Body ground

R - Body

ground

Drive monitor switch

(INFO) signal

Ignition switch ON, drive

monitor switch (INFO)

OFF

10 kohms or higher

Ignition switch ON, drive

monitor switch (INFO)

ON

Below 1 ohms

J28-29 (E) -

Body ground

0 - Body

ground

Drive monitor switch

(SETUP US/M)

signal

Ignition switch ON, drive

monitor switch (SETUP

US/M) OFF

10 kohms or higher

Ignition switch ON, drive

monitor switch (SETUP

US/M) OFF

Below 1 ohms

J28-30 (RSET)

- Body ground

L - Body

ground

Drive monitor switch

(SELECT RESET)

signal

Ignition switch ON, drive
monitor switch (SELECT

RESET) OFF

10 kohms or higher

Ignition switch ON, drive
monitor switch (SELECT

RESET) ON

Below 1 ohms

J28-31 (TX+) -

Body ground

Y - Body

ground

Accessory meter

input signal

Ignition switch ON

10 kohms or higher

J28-35 (+S) -

Body ground

V - Body

ground

Speed signal (output)

Ignition switch ON,

wheel turned slowly

Pulse generation

J28-36 (SI) -

Body ground

GR - Body

ground

Speed signal (input)

Ignition switch ON,

wheel turned slowly

Pulse generation

J28-37 (ILL-) -

Body ground

R - Body

ground

Illumination ground

Always

Below 1 ohms

J-28-38 (TC) -

Body ground*2

SB - Body

ground

TAIL cancel switch

signal

TAIL cancel switch OFF 10 kohms or higher

TAIL cancel switch ON

Below 1 ohms

J28-39 (E3) -

Body ground

Y - Body

ground

Fuel sender gauge

ground

Always

Below 1 ohms

J28-40 (E1) -

Body ground

W-B -

Body

ground

Ground

Always

Below 1 ohms

HINT:
*1: w/ Curtain shield airbag
*2: w/ TAIL cancel switch

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Meter - Tundra