MPI <4G1> -
Troubleshooting
13A-62
INSPECTION PROCEDURE 29
A/C switch and A/C relay system
Probable cause
When an A/C ON signal is input to the engine-ECU, the engine-ECU carries out
control of the idle speed control (ISC) servo, and also operates the A/C compressor
magnetic clutch.
D
Malfunction of A/C control system
D
Malfunction of A/C switch
D
Improper connector contact, open circuit or
short-circuited harness wire
D
Malfunction of the engine-ECU
Check the A/C compressor relay.
(Refer to GROUP 55 - On-vehicle Service.)
NG
Replace
OK
Measure at the engine-ECU connectors B-36, B-37.
D
Disconnect the connectors, and measure at the harness side.
D
Voltage between 8 <Vehicles with immobilizer system>, 22
<Vehicles without immobilizer system> and earth, and 45 and
earth (Ignition switch: ON, A/C switch: ON)
OK:
System voltage
D
Short circuit between 8 <Vehicles with immobilizer system>,
22 <Vehicles without immobilizer system> and earth(Ignition
switch: ON, A/C switch: ON)
OK:
A/C compressor clutch turns on.
NG
Check the A/C system. (Refer to GROUP 55 - On-vehicle Service.)
OK
Check the following
connectors:
B-36, B-37
NG
Replace
OK
Check the trouble symptom.
NG
Replace the engine-ECU.
Содержание Colt 2000
Страница 7: ...11A 1 ENGINE CONTENTS ENGINE 4G1 11A ENGINE 4G9 11B ...
Страница 30: ...NOTES ...
Страница 221: ...23 1 AUTOMATIC TRANSMISSION CONTENTS GENERAL 2 Outline of Changes 2 TROUBLESHOOTING 2 ...