Toyota Sequoia (2005). Manual - part 104

B17414

E6

ECM Connector

VV2+

VV1–

VV1+

VV2–

A21029

Wire Harness Side

VVT Sensor

V16

V17

BR3795

OK

NG

Clearance

–

DIAGNOSTICS

ENGINE

DI–219

413

2

Check for open and short in harness and connector between ECM and VVT sen-
sor.

PREPARATION:
(a)

Disconnect the VVT sensor connector.

(b)

Disconnect the E6 ECM connector.

CHECK:
Measure the resistance between the wire harness side connec-
tors.
OK:

Standard:

Tester Connection

Specified Condition

VVT sensor (V16–1) – VV1+ (E6–25)

Below 1 

Ω

VVT sensor (V16–2) – VV1– (E6–24)

Below 1 

Ω

VVT sensor (V17–1) – VV2+ (E6–18)

Below 1 

Ω

VVT sensor (V17–2) – VV2– (E6–28)

Below 1 

Ω

VVT sensor (V16 –1) or 

VV1+ (E6–25) – Body ground

10 k

Ω

 or higher

VVT sensor (V16–2) or 

VV1– (E6–24) – Body ground

10 k

Ω

 or higher

VVT sensor (V17 –1) or 

VV2+ (E6–18) – Body ground

10 k

Ω

 or higher

VVT sensor (V17–2) or 

VV2– (E6–28) – Body ground

10 k

Ω

 or higher

NG

Repair or replace harness or connector.

OK

3

Check sensor installation (VVT position sensor).

CHECK:
Check the VVT position sensor installation.
OK:

The VVT sensor is installed properly.

NG

Tighten sensor installation bolt.

OK

DI–220

–

DIAGNOSTICS

ENGINE

414

4

Inspect teeth of camshaft.

PREPARATION:
Remove the cylinder head cover (See page 

EM–29

).

CHECK:
Check the camshaft.

NG

Replace camshaft.

OK

Replace Camshaft position sensor 
(See page 

IG–7

).

–

DIAGNOSTICS

ENGINE

DI–221

415

DTC

P0351

Igniter Coil ”A” Primary/Secondary Circuit

DTC

P0352

Igniter Coil ”B” Primary/Secondary Circuit

DTC

P0353

Igniter Coil ”C” Primary/Secondary Circuit

DTC

P0354

Igniter Coil ”D” Primary/Secondary Circuit

DTC

P0355

Igniter Coil ”E” Primary/Secondary Circuit

DTC

P0356

Igniter Coil ”F” Primary/Secondary Circuit

DTC

P0357

Igniter Coil ”G” Primary/Secondary Circuit

DTC

P0358

Igniter Coil ”H” Primary/Secondary Circuit

HINT:

These DTCs indicate a malfunction related to primary circuit.

If DTC P0351 is displayed, check No. 1 ignition coil with igniter circuit.

If DTC P0352 is displayed, check No. 2 ignition coil with igniter circuit.

If DTC P0353 is displayed, check No. 3 ignition coil with igniter circuit.

If DTC P0354 is displayed, check No. 4 ignition coil with igniter circuit.

If DTC P0355 is displayed, check No. 5 ignition coil with igniter circuit.

If DTC P0356 is displayed, check No. 6 ignition coil with igniter circuit.

If DTC P0357 is displayed, check No. 7 ignition coil with igniter circuit.

If DTC P0358 is displayed, check No. 8 ignition coil with igniter circuit.

DICF0–02

A21429

ECM

No.1 Ignition Coil with Igniter

No. 2 Ignition 
Coil with Igniter

Crankshaft 
Position 
Sensor

Camshaft
Position
Sensor

Other Sensors:

No. 3 Ignition 
Coil with Igniter

No. 4 Ignition 
Coil with Igniter

No. 5 Ignition 
Coil with Igniter

No. 6 Ignition 
Coil with Igniter

No. 7 Ignition 
Coil with Igniter

No. 8 Ignition 
Coil with Igniter

TAC

To Tachometer

From Battery

Igniter

Ignition Coil

Spark Plug

No. 1 Cylinder

No. 4 Cylinder

No. 5 Cylinder

No. 6 Cylinder

No. 2 Cylinder

No. 3 Cylinder

No. 7 Cylinder

No. 8 Cylinder

IGT1

IGF1

IGT2

IGF2

IGT3

IGT4

IGT5

IGT6

IGT7

IGT8

(Engine Coolant Temp.
Sensor, Mass Air Flow 
Sensor, Throttle Position 
Sensor, etc.)

DI–222

–

DIAGNOSTICS

ENGINE

416

CIRCUIT DESCRIPTION

These DTCs indicate a malfunction related to primary circuit.
The DIS is a 1–cylinder ignition system which ignites one cylinder with one ignition coil. In the 1–cylinder
ignition system, the one spark plug is connected to the end of the secondary winding. High voltage generated
in the secondary winding is applied directly to the spark plug. The spark of the spark plug passes from the
center electrode to the ground electrode.
The ECM determines the ignition timing and outputs the ignition signals (IGTs) for each cylinder. Using the
IGT, the ECM turns on and off the power transistor inside the igniter and this switches on and off the current
to the primary coil. When the current to the primary coil is cut off, high–voltage is generated in the secondary
coil and this voltage is applied to the spark plugs to create sparks inside the cylinders. As the ECM cuts the
current to the primary coil, the igniter sends back the ignition confirmation signal (IGF) for each cylinder igni-
tion to the ECM.