Toyota Tundra (2015 year). Manual — part 2277
OK
(a) Remove the No. 1 cooler thermistor connector
.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
TESTER CONNECTION
CONDITION
SPECIFIED CONDITION
1 - 2
-10°C (14°F)
7.30 to 9.10 kΩ
-5°C (23°F)
5.65 to 6.95 kΩ
0°C (32°F)
4.40 to 5.35 kΩ
5°C (41°F)
3.40 to 4.15 kΩ
10°C (50°F)
2.70 to 3.25 kΩ
15°C (59°F)
2.14 to 2.58 kΩ
20°C (68°F)
1.71 to 2.05 kΩ
25°C (77°F)
1.38 to 1.64 kΩ
30°C (86°F)
1.11 to 1.32 kΩ
NOTICE:
As the temperature increases, the resistance decreases (see the graph).
NG
REPLACE NO. 1 COOLER THERMISTOR
3.
REPAIR OR REPLACE AIR CONDITIONING HARNESS
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air...
NEXT
(a) Repair or replace the air conditioning harness.
4.
CHECK FOR DTC
(a) Clear the DTC
.
(b) Check for DTC
.
OK:
DTC is not output.
NG
REPLACE AIR CONDITIONING AMPLIFIER
OK
END (AIR CONDITIONING HARNESS IS
DEFECTIVE)
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air...
Last Modified: 9-16-2014
6.6 C
Doc ID: RM000002ZSV00VX
Model Year: 2015
Model: Tundra
Prod Date Range: [08/2014 - ]
Title: AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air Conditioning System): B1422/22;
Compressor Lock Sensor Circuit; 2015 MY Tundra [08/2014 - ]
DTC
B1422/22 Compressor Lock Sensor Circuit
DESCRIPTION
The ECM sends an engine speed signal to the air conditioning amplifier via the CAN communication system.
The air conditioning amplifier reads the difference between compressor speed and engine speed. When the
difference becomes too large, the air conditioning amplifier determines that the compressor locks, and turns the
magnetic clutch off.
DTC
CODE
DTC DETECTION CONDITION
TROUBLE AREA
B1422/22
Open or short in compressor
lock sensor circuit
Air conditioning compressor (lock sensor)
Compressor drive belt
Harness or connector between air conditioning compressor
(lock sensor) and air conditioning amplifier
Air conditioning amplifier
CAN communication system
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air...
A
1.
CHECK FOR DTC (CAN COMMUNICATION SYSTEM)
(a) Use the Techstream to check if the CAN communication system is functioning normally
.
Result
RESULT
PROCEED TO
CAN DTC is not output
A
CAN DTC is output
B
B
GO TO CAN COMMUNICATION SYSTEM
2.
CHECK AIR CONDITIONING AMPLIFIER
(a) Remove the air conditioning amplifier with the connectors still connected
.
(b) Using an oscilloscope, check the waveform.
Standard:
AIR CONDITIONING: AIR CONDITIONING SYSTEM (for Manual Air...
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