An air compressor is a device that converts power (usually from an electric motor, a diesel engine or a gasoline engine) into kinetic energy by compressing and pressurizing air, which, on command, ...
Gives an idea of High Pressure Heat Exchanger with special construction
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COMPRESSOR
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AC–142 AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)
DTC
B 1422/22 Co m p r es s o r Lo L o c k Se Sen s o r Ci Ci r c u i t
DESCRIPTION This sensor sends 1 pulse per engine revolution to the air conditioning amplifier. If the ratio of the compressor speed divided by the engine speed is s maller than a predetermined value, the air conditioning amplifier turns the compressor off, and the indicator blinks at approximately 1 second intervals. DTC No .
DTC Det ec t i o n Co n d i t i o n
B1422/22
Open or short in compressor lock sensor circuit All conditions below below are detected for for 3 seconds or more: 1. Engine speed: 450 rpm or more 2. Ratio between engine and compressor speed deviates 20% or more in comparison to normal operation
Tr o u b l e A r ea • • • • •
Comp Compre ress ssor or and and mag magne neti tic c clut clutch ch Compre Compress ssor or and and magn magneti etic c clut clutch ch driv drive e belt Comp Compre ress ssor or lock lock sens sensor or Wire Wire harn harness ess betwee between n comp compres ressor sor lock lock sensor and air conditioning amplifier Air Air cond condit itio ioni ning ng ampl amplif ifie ier r
WIRING WIRING DIAGRAM DIAGRA M
Air Conditioning Amplifier
LOCK SSR+
Compressor Lock Sensor
AC SSR-
SG-2
E127541E01
AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System) AC–143
INSPECTION PROCEDURE
1
CHECK AIR CONDITIONING AMPLIFIER (LOCK SIGNAL)
Wire Harness Side Air Conditioning Amplifier
E36
(a) Remove the air conditioning amplifier with its connectors still connected. (b) Check the waveform of the amplifier connector. OK: Waveform is as shown in t he illustration. Item
Content
Tester Connection
LOCK (E36-3) - SG-2 (E36-10)
Tool Setting
500 mV/DIV., 20 msec./DIV. Ignition switch ON A/C switch ON Magnetic clutch ON
Condition
SG-2
LOCK
Waveform 500 mV/DIV.
GND
20 msec./DIV.
AC
E127545E01
Result Result
Proceed to
NG
A
OK (Checking from the PROBLEM SYMPTOMS TABLE)
B
OK (Checking from the DTC)
C
A
B
PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE
C
REPLACE A IR CONDITIONING AMPLIFIER
AC–144 AIR CONDITIONING – AIR CONDITIONING SYSTEM (for Manual Air Conditioning System)
2
INSPECT COMPRESSOR LOCK SENSOR
SSR+
SSR-
(a) Disconnect the B47 compressor lock sensor connector. (b) Measure the resistance of the sensor. Standard resis tance Tester Connection
Condition
Specified Condition
1 (SSR+) - 2 (SSR-)
20 °C (68°F)
65 to 125 Ω
NG
REPLACE COMPRESSOR LOCK SENSOR
E127543E01
OK
3
CHECK WIRE HARNESS (COMPRESSOR LOCK SENSOR - A IR CONDITIONING AMPL IFIER) (a) Disconnect the B47 compressor lock sensor connector. (b) Disconnect the E36 amplifier connector. (c) Measure the resistance of the wire harness side connectors. Standard resis tance
