Toyota Tundra (2015 year). Manual — part 2287
OK
(a) Use the Data List to check if the air conditioning signal is functioning properly.
Engine and ECT
TESTER DISPLAY
MEASUREMENT ITEM / RANGE
NORMAL CONDITION
DIAGNOSTIC NOTE
A/C Signal
A/C switch signal /
ON or OFF
ON: A/C switch ON
OFF: A/C switch OFF
-
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
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
CONDITION
SPECIFIED CONDITION
A/C IG fuse
Always
Below 1 Ω
NG
REPLACE FUSE
3.
CHECK HARNESS AND CONNECTOR (ENGINE ROOM RELAY BLOCK - BATTERY)
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air...
OK
(a) Remove the magnetic clutch relay (MG CLT) from the engine
room relay block, junction block.
(b) Measure the voltage according to the value(s) in the table
below.
Standard voltage:
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
Engine room relay block, junction
block magnetic clutch relay terminal
5 - Body ground
Ignition switch
ON
11 to 14 V
Ignition switch
off
Below 1 V
Engine room relay block, junction
block magnetic clutch relay terminal
1 - Body ground
Ignition switch
ON
11 to 14 V
Ignition switch
off
Below 1 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
4.
INSPECT MAGNETIC CLUTCH RELAY (MG CLT)
(a) Remove the magnetic clutch relay from the engine room
relay block, junction block.
(b) Measure the resistance according to the value(s) in the table
below.
Standard resistance:
TESTER
CONNECTION
CONDITION
SPECIFIED
CONDITION
3 - 5
When battery voltage is not
applied between terminals 1 and
2
10 kΩ or higher
When battery voltage is applied
to terminals 1 and 2
Below 1 Ω
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air...
OK
OK
NG
REPLACE MAGNETIC CLUTCH RELAY
5.
CHECK HARNESS AND CONNECTOR (AIR CONDITIONING AMPLIFIER - BATTERY)
(a) Disconnect the J19 air conditioning amplifier connector.
(b) Measure the voltage according to the value(s) in the table
below.
Standard voltage:
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
J19-20 (MGC) - Body
ground
Ignition switch OFF
Below 1 V
Ignition switch ON
11 to 14 V
NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
6.
CHECK AIR CONDITIONING AMPLIFIER (MGC VOLTAGE)
(a) Reconnect the J19 air conditioning amplifier connector.
(b) Measure the voltage according to the value(s) in the table
below.
Standard voltage:
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
J19-20 (MGC) - Body
ground
Engine is running
Blower switch LO
A/C switch ON
Below 1 V
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air...
OK
OK
TESTER CONNECTION
SWITCH
CONDITION
SPECIFIED
CONDITION
Engine is running
Blower switch LO
A/C switch OFF
11 to 14 V
NG
REPLACE AIR CONDITIONING AMPLIFIER
7.
INSPECT AIR CONDITIONING COMPRESSOR (COMPRESSOR HARNESS)
(a) Disconnect the D60 air conditioning compressor connector.
(b) Disconnect the magnetic clutch connector.
(c) Measure the resistance according to the value(s) in the table
below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
3 (MG+) - 1
Always
Below 1 Ω
3 (MG+) or 1 - Body ground
Always
10 kΩ or higher
NG
REPAIR AIR CONDITIONING COMPRESSOR
8.
INSPECT MAGNETIC CLUTCH
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air...
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