Toyota Tundra. Manual — part 1203

TESTER CONNECTION SPECIFIED CONDITION

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig. 139: Identifying D58 Or D59 ASV Connector Terminals

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 D51 or D55 air injection control driver (AID) connector.

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

Standard resistance (Check for open)

TESTER CONNECTION SPECIFIED CONDITION

Standard resistance (Check for short)

TESTER CONNECTION SPECIFIED CONDITION

Tester Connection

Condition Specified Condition

D58-1 (GND) - Body ground

Always

Below 1 ohms

D59-1 (GNDL) - Body ground Always

Below 1 ohms

Tester Connection

Condition Specified Condition

D58-5 (+B) - D55-6 (VV)

Always

Below 1 ohms

D59-5 (+BL) - D51-6 (VV2) Always

Below 1 ohms

Tester Connection

Condition Specified Condition

D58-5 (+B) or D55-6 (VV) - Body ground

Always

1 kohms or higher

D59-5 (+BL) or D51-6 (VV2) - Body ground Always

1 kohms or higher

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

NG : REPAIR OR REPLACE HARNESS OR CONNECTOR

Fig. 140: Identifying D55 Air Injection Control Driver Connector Terminals

OK : REPLACE AIR INJECTION CONTROL DRIVER . (See AIR INJECTION DRIVER ).

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

DESCRIPTION

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

Refer to DTC P0412 .

DTC TROUBLE DETECTION CONDITION CHART

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 sets the DTC based on diagnostic signals from the AID.

MONITOR STRATEGY

MONITOR STRATEGY

DTC

No.

DTC Detection Condition

Trouble Area

P0418
P0419

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

a. 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



Air injection control driver
(AID)



ECM

P0418
P0419

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

a. 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

Related DTCs

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

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra

TYPICAL ENABLING CONDITIONS

Case 1:

TYPICAL ENABLING CONDITIONS

Case 2:

TYPICAL ENABLING CONDITIONS

TYPICAL MALFUNCTION THRESHOLDS

TYPICAL MALFUNCTION THRESHOLDS

COMPONENT OPERATING 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

Time after ignition switch OFF to ON

0.5 seconds or more

Starter

OFF

Time after starter turned from ON to OFF

0.5 seconds or more

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

Time after ignition switch OFF to ON

0.5 seconds or more

Starter

OFF

Time after starter turned from ON to OFF

0.5 seconds or more

Diagnostic signal duty ratio from air injection control driver

11% or more, and 29% or less

2008 Toyota Tundra

2008 ENGINE PERFORMANCE Engine Control System (1GR-FE) - Tundra