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.
(3) Service data items to be transferred to multi-use
tester
(4) Actuator test items by multi-use tester
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
Æ
1 second).
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.
(2) The other functions remain unchanged.
(3) The diagnosis items are as shown in the following
table.
Code Diagnosis item Description DIAGNOSIS
No. 2 Mode
11 Oxygen sensor (Rear bank) Malfunction of the air/fuel ratio control system
-
<Except for General export and GCC> Open or short circuit in the oxygen sensor circuit
12 Air flow sensor Open or short circuit in sensor and allied circuit Valid
13 Intake air temperature sensor Open or short circuit in sensor and allied circuit Valid
14 Throttle position sensor Abnormal sensor output Valid
Oxygen sensor <Except for General Export and GCC> Barometric pressure sensor
Air flow sensor (AFS) Detonation sensor
Intake air temperature sensor Ignition timing adjustment signal*
Throttle position sensor Injector
Coolant temperature sensor Ignition coil, power transistor unit
Crank angle sensor
Cam position sensor Engine control unit
ENGINE -
Control System
1-27
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