Toyota Tundra. Manual — part 2429

DATA LIST

OK:

The display is as specified in the normal condition.

NG: Go to step 2

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS
TABLE (See PROBLEM SYMPTOMS TABLE )

2. INSPECT FUSE (A/C IG)

a. Remove the A/C IG fuse from the main body ECU.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

NG: REPLACE FUSE

OK: Go to Next Step

3. INSPECT MAGNETIC CLUTCH RELAY (MG CLT)

a. Remove the magnetic clutch relay from the engine room relay block.

Fig. 135: Inspecting Magnetic Clutch Relay (MG CLT)
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

Tester

Display

Measurement Item/Range

Normal Condition

Diagnostic

Note

A/C Signal

Air conditioning switch signal/ON or
OFF

ON: Air conditioning ON
OFF: Air conditioning
OFF

-

Tester Connection Condition Specified Condition

A/C IG fuse

Always

Below 1 ohms

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

NG: REPLACE MAGNETIC CLUTCH RELAY

OK: Go to Next Step

4. CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)

a. Disconnect the J19 air conditioning amplifier connector.

Fig. 136: Identifying Terminals Of J19 Air Conditioning Amplifier Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR

OK: Go to Next Step

Tester Connection

Condition

Specified Condition

3 - 5

When battery voltage is not applied between terminals 10 kohms or higher
When battery voltage is applied to terminals 1 and 2

Below 1 ohms

Tester Connection

Switch Condition Specified Condition

J19-20 (MGC) - Body ground

Ignition switch OFF

Below 1 V

Ignition switch ON

11 to 14 V

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

5. CHECK AIR CONDITIONING AMPLIFIER (MGC VOLTAGE)

a. Reconnect the J19 air conditioning amplifier connector.

Fig. 137: Identifying Terminals Of J19 Air Conditioning Amplifier Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

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

Standard Voltage

TESTER CONNECTION SPECIFIED CONDITION CHART

NG: REPLACE AIR CONDITIONING AMPLIFIER (See REMOVAL )

OK: Go to Next Step

6. INSPECT AIR CONDITIONING COMPRESSOR (COMPRESSOR HARNESS)

a. Disconnect the D60 air conditioning compressor connector.

Tester Connection

Switch Condition

Specified

Condition

J19-20 (MGC) - Body

ground

Engine running and air conditioning switch ON

Below 1 V

Engine running and air conditioning switch
OFF

11 to 14 V

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra

Fig. 138: Identifying Terminals Of D60 Air Conditioning Compressor Connector
Courtesy of TOYOTA MOTOR SALES, U.S.A., INC.

b. Disconnect the magnetic clutch connector.

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

NG: REPAIR AIR CONDITIONING COMPRESSOR

OK: Go to Next Step

7. INSPECT MAGNETIC CLUTCH

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

Standard Resistance

TESTER CONNECTION SPECIFIED CONDITION CHART

Tester Connection

Condition Specified Condition

3 (MG+) -1

Always

Below 1 ohms

3 (MG+) or 1 - Body ground Always

10 kohms or higher

Tester Connection Condition Specified Condition

1 - Body ground

Always

3.4 to 3.8 ohms

2009 Toyota Tundra

2009 HVAC Air Conditioning - Tundra