Toyota Sequoia (2005). Manual - part 128

B17414

E6

ECM Connector

G2+

G2–

B17445

Wire Harness Side:

Camshaft Position Sensor

C1

BR3795

OK

NG

Clearance

–

DIAGNOSTICS

ENGINE

DI–307

501

3

Check for open and short in harness and connector between ECM and camshaft
position sensor.

PREPARATION:
(a)

Disconnect the Camshaft position sensor connector.

(b)

Disconnect the E6 ECM connector.

CHECK:
Measure the resistance between wire harness side connectors.
OK:

Standard:

Tester Connection

Specified Condition

Camshaft position sensor (C1–2) – 

G2+ (E6–19)

Below 1 

Ω

Camshaft position sensor (C1–1) – 

G2– (E6–29)

Below 1 

Ω

Camshaft position sensor (C1–2) or 

G2+ (E6–19) – Body ground

10 k

Ω

 or higher

Camshaft position sensor (C1–1) or 

G2– (E6–29) – Body ground

10 k

Ω

 or higher

NG

Repair or replace harness or connector.

OK

4

Inspect sensor installation and signal plate tooth of LH camshaft timing pulley.

CHECK:
Check the camshaft position sensor installation.
OK:

The camshaft position sensor is installed properly.

NG

Tighten sensor installation bolt.

OK

DI–308

–

DIAGNOSTICS

ENGINE

502

5

Inspect signal plate tooth of LH camshaft timing pulley.

NG

Replace LH camshaft timing pulley.

OK

Replace camshaft position sensor.

–

DIAGNOSTICS

ENGINE

DI–309

503

DTC

P1440

Secondary Air Injection System Control
Valve Circuit Bank 1

DTC

P1443

Secondary Air Injection System Control
Valve Circuit Bank 2

CIRCUIT DESCRIPTION

Refer to DTC P0412 on page 

DI–234

.

DTC No.

DTC Detection Condition

Trouble Area

P1440

AIV1 terminal voltage becomes less than half of the +B voltage

while the VSV for air injection control is not operating.

(1 trip detection logic)

Open or short in VSV for air injection control circuit (Bank 1)

VSV power source

VSV for air injection control (Bank 1)

ECM

P1443

AIV2 terminal voltage becomes less than half of the +B voltage

while the VSV for air injection control is not operating.

(1 trip detection logic)

Open or short in VSV for air injection control circuit (Bank 2)

VSV power source

VSV for air injection control (Bank 2)

ECM

MONITOR DESCRIPTION

The ECM detects an open or short in the circuit of the VSV for air injection control according to the AIV1
(AIV2) terminal voltage, stores the DTC, and then illuminates the MIL. When the AIV1 (AIV2) terminal voltage
is less than half of the +B voltage while the VSV for air injection control is not operating, the ECM determines
it as a malfunction.

MONITOR STRATEGY

R l t d DTC

P1440

Secondary air injection system control valve cir-

cuit (Bank 1) range check

Related DTCs

P1443

Secondary air injection system control valve cir-

cuit (Bank 2) range check

Required sensors/components

VSV for air injection control

Frequency of operation

Continuous

Duration

0.5 sec.

MIL operation

Immediate

Sequence of operation

None

DIDMQ–01

DI–310

–

DIAGNOSTICS

ENGINE

504

TYPICAL ENABLING CONDITIONS

It

Specification

Item

Minimum

Maximum

The monitor will run whenever these

DTCs are not present

See page 

DI–18

P1440:

Engine

Running

Air switching valve No. 2 (Bank 1)

Not operating

P1443:

Engine

Running

Air switching valve No. 2 (Bank 2)

Not operating

TYPICAL MALFUNCTION THRESHOLDS

Detection Criteria

Threshold

P1440:

Air switching valve No. 2 (Bank 1) output terminal level

Low

P1443:

Air switching valve No. 2 (Bank 2) output terminal level

Low