Toyota Sequoia (2005). Manual - part 178

A21559

Engine Room R/B No.2

Starter Relay

–

DIAGNOSTICS

ENGINE

DI–507

701

7

Check engine room R/B No.2 (Starter relay voltage).

PREPARATION:
Remove the starter relay from the engine room R/B No.2.
CHECK:
Measure the voltage between the terminal of the engine room
R/B and body ground.
OK:

Standard:

Tester Connection

Specified Condition

Starter relay (5) – Body ground

9 to 14 V

NG

Check and repair harness and connector be-
tween starter relay and battery.

OK

8

Check starter (See page 

ST–15

).

NG

Repair or replace starter.

OK

I08467

LOCK

ACC

ON

START

DI–508

–

DIAGNOSTICS

ENGINE

702

9

Check ignition switch.

PREPARATION:
(a)

Remove the lower finish panel.

(b)

Disconnect the ignition switch connector.

CHECK:
Check resistance between terminals.
OK:

Standard:

Switch Position

Terminal Condition

Specified Condition

LOCK

Always

10 k

Ω

 or more

ACC

1 – 3

Below 1 

Ω

ON

1 – 2 – 3

5 – 6

Below 1 

Ω

START

1 – 2

4 – 5 – 6

Below 1 

Ω

NG

Replace ignition switch.

OK

Check for open in harness and connector be-
tween ECM and ignition switch, ignition
switch and battery (See page 

IN–35

).

–

DIAGNOSTICS

ENGINE

DI–509

703

Fuel Pump Control Circuit

CIRCUIT DESCRIPTION

Refer to DTC P0230 on page 

DI–179

.

WIRING DIAGRAM

Refer to DTC P0230 on page 

DI–179

.

INSPECTION PROCEDURE

1

Check fuel pump operation (See page 

SF–7

).

OK

Go to step 8.

NG

2

Connect hand–held tester, and check operation of fuel pump relay.

PREPARATION:
(a)

Connect the hand–held tester to the DLC3.

(b)

Turn the ignition switch ON and push the hand–held tester main switch ON.

(c)

Enter the following menu: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST / FUEL PUMP SPD.

CHECK:
Check the operation of the fuel pump relay when it is switched ON and OFF by the hand–held tester.
OK:

Operating noise can be heard from the relay.

OK

Go to step 4.

NG

DID8L–01

A21024

A19288

DI–510

–

DIAGNOSTICS

ENGINE

704

3

Check operation of fuel pump relay.

PREPARATION:
Remove the fuel pump relay from the engine room R/B.
CHECK:
Inspect the fuel pump relay.
OK:

Terminal No.

Condition

Specified Condition

3 – 4

Apply B+ between 

terminals 1 and 2

10 K

Ω

 or higher

3 – 4

Always

Below 1  

Ω

3 – 5

Always

10 K

Ω

 or higher

3 – 5

Apply B+ between 

terminals 1 and 2

Below 1  

Ω

NG

Replace fuel pump relay.

OK

4

Check fuel pump (See page 

SF–7

).

NG

Repair or replace fuel pump.

OK

5

Check circuit opening relay (See page 

SF–58

).

PREPARATION:
Remove the C/OPN relay from the engine room J/B.
CHECK:
Inspect the C/OPN relay.
OK:

Standard:

Terminal No.

Condition

Specified Condition

3 – 5

Always

10 K

Ω

 or higher

3 – 5

Apply B+ between 

terminals 1 and 2

Below 1  

Ω

NG

Replace circuit opening relay.

OK