MPI <4G9> -
Troubleshooting
13A-95
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
(2) NG
Replace the air flow sensor.
NG
Check the following connector:
B-34 <M/T>, B-94 <A/T>
NG
Repair
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
Check the trouble symptoms.
OK
Check the harness between the air
flow sensor and the engine-ECU
<M/T> or engine-A/T-ECU <A/T>,
and repair if necessary.
From the previous page
OK
Measure at engine-ECU <M/T> or
engine-A/T-ECU <A/T> connector
B-34 <M/T>, B-94 <A/T>.
D
Measure the voltage at the
engine-ECU <M/T> or
engine-A/T-ECU <A/T> terminal.
D
Ignition switch: ON
D
Voltage between terminal 81
<M/T>, 46 <A/T> and earth
OK:
Altitude 0 m: 3.7 - 4.3 V
Altitude 1,200 m:
3.2 - 3.8 V
NG
Check the following connector:
B-34 <M/T>, B-94 <A/T>
NG
Repair
OK
Check the trouble symptoms.
OK
Check the following connector:
B-34 <M/T>, B-94 <A/T>
NG
Repair
NG
Replace the engine-ECU <M/T> or
engine-A/T-ECU <A/T>.
OK
Measure at air flow sensor connector
A-99.
D
Connect connector terminals No.
1, No. 2 and No. 5 only by using
test harness (MB991709), and
measure at the pick-up harness.
D
Ignition switch: ON
(1) Voltage between terminal 1 and
earth
OK:
4.8 - 5.2 V
(2) Voltage between terminal 2 and
earth
OK:
Altitude 0 m: 3.7 - 4.3 V
Altitude 1,200 m:
3.2 - 3.8 V
(3) Voltage between terminal 5 and
earth
OK:
0.5 V or less
(1) NG
Check the following connector:
B-34 <M/T>, B-94 <A/T>
NG
Repair
(3) NG