Toyota Tundra. Manual — part 762

INSPECTION PROCEDURE

HINT:

This circuit uses the LIN communication line. Before performing the inspection, check that the LIN
communication system is functioning normally (see HOW TO PROCEED WITH TROUBLESHOOTING ).

1. PERFORM ACTIVE TEST BY TECHSTREAM (DEFOGGER RELAY)

a. Select the Active Test using the Techstream to generate a control command, and then check that the

rear window defogger operates.

Air Conditioner

AIR CONDITIONER - TECHSTREAM TESTER DISPLAY REFERENCE CHART

OK: Rear window defogger operates normally.

NG: Go to step 3

OK: Go to Next Step

2. CHECK INTEGRATION CONTROL AND PANEL (OPERATION)

a. Temporarily replace the integration control and panel with a new or normally functioning one.

1. For Column Shift Type, refer to the following procedures (see INTEGRATION

CONTROL AND PANEL (FOR COLUMN SHIFT TYPE) ).

2. For Floor Shift Type, refer to the following procedures (see INTEGRATION CONTROL

AND PANEL (FOR FLOOR SHIFT TYPE) ).

b. Check that the malfunction disappears.

OK: Malfunction disappears.

NG: REPLACE AIR CONDITIONING AMPLIFIER (See AIR CONDITIONING AMPLIFIER )

OK: END (INTEGRATION CONTROL AND PANEL IS DEFECTIVE)

3. INSPECT FUSE (DEFOG)

a. Remove the DEFOG H-fuse from the engine room relay block.

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

Standard resistance

FUSE (DEFOG) TESTER CONNECTION SPECIFIED CONDITION

Tester Display

Test Part

Control Range Diagnostic Note

Defogger Relay (Rear) Rear window defogger relay operation

OFF or ON

-

Tester Connection Condition Specified Condition

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra

NG: REPLACE FUSE

OK: Go to Next Step

4. INSPECT DEFOGGER RELAY (DEFOG)

a. Remove the defogger relay from the engine room relay block.

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

Standard resistance

DEFOGGER RELAY (DEFOG) TESTER CONNECTION SPECIFIED CONDITION

Fig. 195: Inspecting Defogger Relay (DEFOG)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPLACE DEFOGGER RELAY

OK: Go to Next Step

5. CHECK HARNESS AND CONNECTOR (DEFOGGER RELAY - BATTERY AND AIR

CONDITIONING AMPLIFIER)

a. Remove the defogger relay from the engine room relay block.

b. Disconnect the J19 air conditioning amplifier connector.

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

Standard voltage

DEFOG H-fuse

Always

Below 1 ohms

Tester

Connection

Condition

Specified

Condition

3-4

When battery voltage is not applied between terminals 1

and 2

Below 1 ohms

3-5

10 kohms or higher

3-4

When battery voltage is applied to terminals 1 and 2

10 kohms or higher

3-5

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra

HARNESS AND CONNECTOR (DEFOGGER RELAY - BATTERY AND AIR
CONDITIONING AMPLIFIER) VOLTAGE

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

Standard resistance

HARNESS AND CONNECTOR (DEFOGGER RELAY - BATTERY AND AIR
CONDITIONING AMPLIFIER) RESISTANCE

Tester Connection

Condition

Specified Condition

Defogger relay terminal 1 - Body ground Ignition switch ON

11 to 14 V

Defogger relay terminal 5 - Body ground

Always

11 to 14 V

Tester Connection

Condition Specified Condition

Defogger relay terminal 2 - J19-38 (RDEF) Always

Below 1 ohms

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra

Fig. 196: Checking Harness And Connector (Defogger Relay - Battery and Air Conditioning
Amplifier)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

6. CHECK HARNESS AND CONNECTOR (REAR WINDOW DEFOGGER - DEFOGGER RELAY

AND BODY GROUND)

a. Disconnect the P9 and P10 defogger connectors.

2009 Toyota Tundra

2009 ACCESSORIES AND EQUIPMENT Windshield/WindowGlass - Tundra