Air Flow Sensor (Afs); Self Diagnosis System - Mitsubishi 1993 3000GT Technical Information Manual

SELF DIAGNOSIS SYSTEM

The following items have been made more complete.
(1) Check engine lamp ON items
(2) Self diagnosis items
CHECK ENGINE LAMP CONTROL
The check engine lamp ON items are shown in the
following table.
Oxygen sensor <Except for General Export and GCC>

Air flow sensor (AFS)

Intake air temperature sensor
Throttle position sensor
Coolant temperature sensor
Crank angle sensor
Cam position sensor
Remarks
The check engine lamp lights even when the ignition timing adjustment terminal is short-circuited to the earth during an
*:
injection timing adjustment.
SELF DIAGNOSIS FUNCTIONS
(1) Arrangements have been made to allow changeover
of the diagnosis mode from DIAGNOSIS 1 mode to
DIAGNOSIS 2 mode by sending a diagnosis mode
changeover signal from the multiuse tester.
In the DIAGNOSIS 2 mode, note that the time from
when a fault is detected to when it is determined as a
fault is shorter than in the DIAGNOSIS 1 mode (4
seconds 1 second).
Code Diagnosis item
No.
11 Oxygen sensor (Rear bank)
<Except for General export and GCC>
12 Air flow sensor
13 Intake air temperature sensor
14 Throttle position sensor
ENGINE -
Control System
(3) Service data items to be transferred to multi-use
(4) Actuator test items by multi-use tester
Barometric pressure sensor
Detonation sensor
Ignition timing adjustment signal*
Injector
Ignition coil, power transistor unit
Engine control unit
(2) The other functions remain unchanged.
(3) The diagnosis items are as shown in the following
Malfunction of the air/fuel ratio control system
Open or short circuit in the oxygen sensor circuit
Open or short circuit in sensor and allied circuit
Open or short circuit in sensor and allied circuit
Abnormal sensor output
tester
When the multi-use tester is disconnected from the
diagnosis connector, all fault codes will' be cleared
from the memory, and the DIAGNOSIS 2 mode will
be changed back to the DIAGNOSIS 1 mode.
table.
Description
1-27
DIAGNOSIS
2 Mode
-
Valid
Valid
Valid