Toyota Tundra. Manual — part 2342

STARTER RELAY

ON-VEHICLE INSPECTION

1

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

2

REMOVE STARTER RELAY (ST)

a

Remove the engine room relay box cover

b

Remove the starter relay from the engine room relay block

3

INSPECT STARTER RELAY

a

Measure the resistance according to the value(s) in the table below

Standard resistance

STARTER RELAY TERMINAL CONNECTION SPECIFIED CONDITION CHART

Fig. 78: Inspecting Starter Relay
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

If the result is not as specified, replace the relay

4

INSTALL STARTER RELAY

NOTE:



Some systems need to be initialized after the cable is reconnected
(see INITIALIZATION ).



After the ignition switch is turned OFF, the navigation system
requires approximately 90 seconds to record various types of
memory and settings. As a result, after turning the ignition switch
OFF, wait 90 seconds or more before disconnecting the cable from
the negative (-) battery terminal.

Terminal

Connection

Condition

Specified

Condition

3-5

When battery voltage is not applied to terminals 1 and
2

10 kohms or higher

When battery voltage is applied to terminals 1 and 2

Below 1 ohms

2009 Toyota Tundra

2009 ENGINE Starting (1GR-FE) - Tundra

5

CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

ACC RELAY

ON-VEHICLE INSPECTION

1

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

2

INSPECT MAIN BODY ECU (ACC RELAY)

NOTE:

Some systems need to be initialized after the cable is reconnected (see
INITIALIZATION ).

NOTE:



Some systems need to be initialized after the cable is reconnected
(see INITIALIZATION ).



After the ignition switch is turned OFF, the navigation system
requires approximately 90 seconds to record various types of
memory and settings. As a result, after turning the ignition switch
OFF, wait 90 seconds or more before disconnecting the cable from
the negative (-) battery terminal.

2009 Toyota Tundra

2009 ENGINE Starting (1GR-FE) - Tundra

Fig. 79: Identifying Main Body ECU (ACC Relay) Components Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

a

Measure the resistance of the ACC relay circuit

1

Measure the resistance according to the value(s) in the table below

Standard resistance

MAIN BODY ECU (ACC RELAY) TESTER CONNECTION SPECIFIED
CONDITION CHART

Tester

Connection

Condition

Specified

Condition

2009 Toyota Tundra

2009 ENGINE Starting (1GR-FE) - Tundra

If the result is not as specified, replace the main body ECU

3

CONNECT CABLE TO NEGATIVE BATTERY TERMINAL

ACC CUT RELAY

ON-VEHICLE INSPECTION

1

DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL

2

REMOVE ACC CUT RELAY

a

Remove the clip

b

Detach the 2 clips and remove the cowl side trim board RH

c

Remove the relay

3

INSPECT ACC CUT RELAY

a

Measure the resistance according to the value(s) in the table below

Standard resistance

ACC CUT RELAY TESTER CONNECTION SPECIFIED CONDITION CHART

DD47-DD8

When battery voltage is not applied between DD45
and DD62

10 kohms or

higher

When battery voltage is applied between DD45 and
DD62

Below 1 ohms

NOTE:

Some systems need to be initialized after the cable is reconnected (see
INITIALIZATION ).

NOTE:



Some systems need to be initialized after the cable is reconnected
(see INITIALIZATION ).



After the ignition switch is turned OFF, the navigation system
requires approximately 90 seconds to record various types of
memory and settings. As a result, after turning the ignition switch
OFF, wait 90 seconds or more before disconnecting the cable from
the negative (-) battery terminal.

Tester Connection

Condition

Specified Condition

3-4

When battery voltage is not applied to terminals 1 and 2

Below 1 ohms

When battery voltage is applied to terminals 1 and 2

10 kohms or higher

2009 Toyota Tundra

2009 ENGINE Starting (1GR-FE) - Tundra