Toyota Tundra. Manual — part 1567

Fig. 161: Identifying Terminals Of D58 Or D59 ASV Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

RESISTANCE SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

3. CHECK HARNESS AND CONNECTOR (AIR SWITCHING VALVE - AIR INJECTION

CONTROL DRIVER)

a. Disconnect the D58 or D59 ASV connector.

b. Disconnect the D50 or D54 AID connector.

Fig. 162: Identifying Terminals Of D50 Or D54 AID Connectors
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard resistance

Tester Connection

Condition Specified Condition

D58-1 (GNDL) - Body ground Always

Below 1 ohms

D59-1 (GND) - Body ground

Always

Below 1 ohms

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

RESISTANCE SPECIFIED CONDITION

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: REPLACE AIR INJECTION CONTROL DRIVER (See REMOVAL )

DTC P0418 SECONDARY AIR INJECTION SYSTEM CONTROL "A" CIRCUIT; DTC P0419
SECONDARY AIR INJECTION SYSTEM CONTROL "B" CIRCUIT

DESCRIPTION

Refer to DTC P0412 .

DTC DETECTION CONDITION AND TROUBLE AREA REFERENCE CHART

Tester Connection

Condition Specified Condition

D58-5 (+B) - D50-6 (VV)

Always

Below 1 ohms

D59-5 (+BL) - D54-6 (VV2)

Always

Below 1 ohms

D58-5 (+B) or D50-6 (VV) - Body ground

Always

1 kohms or higher

D59-5 (+BL) or D54-6 (VV2) - Body ground Always

1 kohms or higher

DTC

DTC Detection Condition

Trouble Area

P0418
P0419

After cold engine starts, all of
following conditions met (1 trip
detection logic):

a. Secondary Air Injection

(AIR) system not operating
(air pump OFF, Air
Switching Valve [ASV]
OFF)

b. Diagnostic signal from Air

Injection Control Driver
(AID) 20%

c. Battery voltage 8 V or more



Open in air pump drive
circuit



Air pump



AID



ECM

P0418
P0419

After cold engine starts, all of
following conditions met (1 trip
detection logic):

a. Secondary Air Injection

(AIR) system operating (air
pump ON, Air Switching
Valve [ASV] ON)

b. Diagnostic signal from Air

Injection Control Driver
(AID) 20%

c. Battery voltage 8 V or more



Short between air pump
drive circuit and body
ground



Air pump



AID



ECM

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

MONITOR DESCRIPTION

The Air Injection Control Driver (AID) detects open and short circuits according to the voltages of the air pump
terminal (VP) and the Air Switching Valve (ASV) terminal (VV), and transmits diagnostic information as a
signal to the ECM.

For a short time after cold engine starts, the ECM transmits command signals to the AID to drive the air pump
and ASV.

The AID transmits an air pump malfunction signal to the ECM if either of the following conditions is met:



The voltage at the AID terminal relating to the air pump is low despite the AID receiving command
signals from the ECM to drive the air pump.



The voltage at the AID terminal relating to the air pump is high despite the AID receiving no command
signals from the ECM to drive the air pump.

The ECM stores the DTC based on diagnostic signals from the AID.

MONITOR STRATEGY

MONITOR STRATEGY

TYPICAL ENABLING CONDITIONS

Case 1:

TYPICAL ENABLING CONDITIONS - CASE 1

Related DTCs

P0418: Secondary air injection system air pump circuit range
check (Bank 1)
P0419: Secondary air injection system air pump circuit range
check (Bank 2)

Required Sensors/Components
(Main)

Air injection control driver

Required Sensors/Components
(Related)

Air pump

Frequency of Operation

Once per drive cycle

Duration

3 seconds

MIL Operation

Immediate

Sequence of Operation

None

Monitor runs whenever following DTCs not present

-

Secondary air injection pump

Operating

Secondary air injection switching valve

Operating

Battery voltage

8 V or more

Ignition switch

ON

Starter

OFF

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra

Case 2:

TYPICAL ENABLING CONDITIONS - CASE 2

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING RANGE

COMPONENT OPERATING RANGE

WIRING DIAGRAM

Refer to DTC P0412 .

INSPECTION PROCEDURE

HINT:

Diagnostic information output by the AID can be confirmed by connecting an oscilloscope to the diagnostic
information terminal of the AID. Reading the waveform while performing the AIR system intrusive operation
provided in the System Check function allows the possible trouble areas to be narrowed down.

Monitor runs whenever following DTCs not present

-

Secondary air injection pump

Not operating

Secondary air injection switching valve

Not operating

Battery voltage

8 V or more

Ignition switch

ON

Starter

OFF

Diagnostic signal duty ratio from air injection control driver

11% or more, and 29% or less

Diagnostic signal duty ratio from air injection
control driver

70% or more, and 90% or less when secondary air
injection system operating.
0% when secondary air injection system not operating.

NOTE:



This Air Injection Check only allows technicians to operate the AIR system
for a maximum of 5 seconds. Furthermore, the check can only be
performed up to 4 times per trip. If the test is repeated, intervals of at least
30 seconds are required between checks. While AIR system operation
using the Techstream is prohibited, the Techstream display indicates the
prohibition (WAIT or ERROR).

If an ERROR is displayed on the Techstream during the test, stop the
engine for 10 minutes, and then try again.



Performing the Air Injection Check repeatedly may cause damage to the
AIR system. If necessary, leave an interval of several minutes between

2009 Toyota Tundra

2009 ENGINE PERFORMANCE Engine Control System (3UR-FBE) - Tundra