Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
168
Schematic Diagram for Malfunction Diagnosis of Electronic Injection System
3. Control strategy of malfunction indicator lamp
1) When no malfunction is present:
★
The malfunction indicator lamp lights up after the ignition switch is turned on (ON) and then goes
out after 4s.
★
If the engine is started within 4s, the malfunction indicator lamp goes out upon detection of speed
signal.
★
After the K-line is grounded for more than 2.5s, the malfunction indicator lamp will flash at a
frequency of 2Hz.
2)
When a malfunction is present:
★
The malfunction indicator lamp will be always on after the ignition switch is turned on (ON).
★
After the engine is started, the malfunction indicator lamp will go out upon detection of speed
signal. If the malfunction indicator lamp in question is defined as ON mode in the malfunction
category, the malfunction indicator lamp will be always on after the corresponding conditions are
met.
4. Inspection steps
1) For the vehicles with OBD function, inspection should be carried out always with steps below:
OBD Inspection Steps
1.
Connect the diagnosis equipment to the
diagnosis connector to put through it.
Function
diagnosis
Electronic
control unit
Data
collection
Function
diagnosis
Control command
Actuators
Sensors
Engine
