Toyota Tundra. Manual — part 1662

b. Install the integration relay to the engine room relay block.

c. Install the engine room relay block cover.

CIRCUIT OPENING RELAY

ON-VEHICLE INSPECTION

1. REMOVE CIRCUIT OPENING RELAY (C/OPN)

a. Remove the circuit opening relay from the engine room relay block.

Fig. 425: Identifying Circuit Opening Relay (C/OPN) Circuit With Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. INSPECT CIRCUIT OPENING RELAY

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

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

If the result is not as specified, replace the relay.

3. INSTALL CIRCUIT OPENING RELAY

FUEL PUMP RELAY

ON-VEHICLE INSPECTION

1. REMOVE FUEL PUMP RELAY (F/PMP)

a. Remove the fuel pump relay from the engine room relay block.

Tester Connection

Condition

Specified Condition

3 - 5

When no battery voltage Is applied to terminals 1 and 2 10 kohms or higher
When battery voltage is applied to terminals 1 and 2

Below 1 ohms

2009 Toyota Tundra

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

Saturday, June 19, 2010 7:34:52 PM

Page 741

© 2006 Mitchell Repair Information Company, LLC.

Fig. 426: Identifying Fuel Pump Relay Circuit With Terminals
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. INSPECT FUEL PUMP RELAY

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

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

If the result is not as specified, replace the relay.

3. INSTALL FUEL PUMP RELAY

FUEL PRESSURE CONTROL VALVE RELAY

ON-VEHICLE INSPECTION

1. REMOVE FUEL PRESSURE CONTROL VALVE RELAY (F/PMP VSV)

a. Remove the fuel pressure control valve relay from the engine room relay block.

Fig. 427: Identifying Fuel Pressure Control Valve Relay (F/PMP VSV) Terminals With

Tester Connection

Condition

Specified Condition

3 - 5

When no battery voltage Is applied to terminals 1 and 2 10 kohms or higher
When battery voltage is applied to terminals 1 and 2

Below 1 ohms

2009 Toyota Tundra

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

Saturday, June 19, 2010 7:34:52 PM

Page 742

© 2006 Mitchell Repair Information Company, LLC.

Circuit
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

2. INSPECT FUEL PRESSURE CONTROL VALVE RELAY

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

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

If the result is not as specified, replace the relay.

3. INSTALL FUEL PRESSURE CONTROL VALVE RELAY

A/F SENSOR HEATER RELAY

ON-VEHICLE INSPECTION

1. REMOVE INTEGRATION RELAY (UNIT E)

a. Remove the engine room relay block cover.

b. Using a screwdriver, detach the 2 claws and remove the integration relay from the engine room

relay block.

HINT:

Tape the screwdriver tip before use.

c. Disconnect the 3 connectors.

Fig. 428: Removing Integration Relay From Engine Room Relay Block
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Tester Connection

Condition

Specified Condition

3 - 5

When no battery voltage Is applied to terminals 1 and 2 10 kohms or higher
When battery voltage is applied to terminals 1 and 2

Below 1 ohms

2009 Toyota Tundra

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

Saturday, June 19, 2010 7:34:52 PM

Page 743

© 2006 Mitchell Repair Information Company, LLC.

2. INSPECT INTEGRATION RELAY (A/F)

a. Measure the resistance of the A/F fuse.

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

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

If the result is not as specified, replace the A/F fuse.

b. Measure the resistance of the A/F sensor heater relay circuit.

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

Standard Resistance

RESISTANCE SPECIFIED CONDITIONS

NOTE:



Some relays are built into the integration relay (unit E). The
integration relay cannot be disassembled. If there is a malfunction in
the circuit of the integration relay, replace the integration relay.



The internal circuit of the integration relay is as shown in the
illustration below. Inspect the integration relay using the following
procedures.

Fig. 429: Integration Relay (Unit E) Inner Diagram
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Tester Connection Condition Specified Condition

A/F fuse

Always

Below 1 ohms

Tester

Connection

Condition

Specified

Condition

1C-1 - 1A-4

When battery voltage is not applied to terminals 1A-2

and 1A-3

10 kohms or

higher

When battery voltage is applied to terminals 1A-2 and

1A-3

Below 1 ohms

2009 Toyota Tundra

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

Saturday, June 19, 2010 7:34:52 PM

Page 744

© 2006 Mitchell Repair Information Company, LLC.