MPI <4G9> -
Troubleshooting
13A-160
Engine-ECU <M/T> Connector Terminal
Arrangement
Engine-A/T-ECU <A/T> Connector Terminal
Arrangement
NOTE:
*: Vehicles with immobilizer system.
Terminal
No. <M/T>
Terminal
No. <A/T>
Check item
Check condition (Engine condition)
Normal condition
1
1
No. 1 injector
While engine is idling after having
From 11 - 14 V, momentarily
14
9
No. 2 injector
warmed up, suddenly depress the
accelerator pedal.
drops slightly
2
24
No. 3 injector
15
2
No. 4 injector
4
14
Stepper
motor coil
<A>
Engine: Soon after the warmed up
engine is started
System voltage
«
0 V
(Changes repeatedly)
17
28
Stepper
motor coil
<B>
5
15
Stepper
motor coil
<C>
18
29
Stepper
motor coil
<D>
6
6
EGR control
Ignition switch: ON
System Voltage
solenoid valve
While engine is idling, suddenly depress
the accelerator pedal.
From system voltage,
momentarily drops
8* or 22
20* or 21
A/C relay
D
Engine: Idle speed
D
A/C switch: OFF
®
ON
(A/C compressor is operating)
System voltage or
momentarily
6 V or more
®
0 - 3 V
9
34
Purge control
Ignition switch: ON
System voltage
solenoid
valve
Running at 3,000 r/min while engine is
warming up after having been started.
0 - 3 V
10
11
Ignition coil -
No. 1,
No. 4 (power
transistor)
Engine r/min: 3,000 r/min
0.3 - 3.0 V
23
12
Ignition coil -
No. 2,
No. 3 (power
transistor)