MPI <4G63>
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Troubleshooting
13D-27
OK
Intermittent malfunction
(Refer to GROUP 00
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Points to Note
for Intermittent Malfunctions.)
OK
M.U.T.-
II/III
Data list
D
No. 25 Barometric pressure
sensor (Refer to P.13D-66.)
NG
Replace the engine-A/T-ECU.
OK
Check the following connectors:
C-122, C-124
NG
Repair
OK
Check and repair the harness between
the air flow sensor and engine-A/T-
ECU.
OK
Measure at the C-124 engine-A/T-ECU
connector.
D
Measure the engine-A/T-ECU
terminal voltage.
D
Ignition switch: ON
D
Voltage between terminal No. 55
and earth.
OK:
High 0 m 3.8
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4.2 V
High 600 m 3.5
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3.9 V
High 1,200 m 3.3
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3.7 V
High 1,800 m 3.0
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3.4 V
NG
Check the following connector:
C-124
NG
Repair
OK
Replace the air flow sensor.
OK
Check the harness between the air
flow sensor and engine-A/T-ECU.
NG
Repair
(3) NG
Check the following connector:
C-124
NG
Repair
OK
Check and repair the harness between
the air flow sensor and engine-A/T-
ECU.
OK
Measure at the B-08 air flow sensor
connector.
D
Using the test harness
(MB991709), connect only
connector terminals No. 1, No. 2,
and No. 5, and measure at the
pickup harness.
D
Ignition switch: ON
(1) Voltage between terminal No. 1
and earth
OK:
4.9
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5.1 V
(2) Voltage between terminal No. 5
and earth
OK:
Less than 0.5 V
(3) Voltage between terminal No. 2
and earth
OK:
High 0 m 3.8
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4.2 V
High 600 m 3.5
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3.9 V
High 1,200 m 3.3
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3.7 V
High 1,800 m 3.0
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3.4 V
(1) NG
Check the following connector:
C-124
NG
Repair
From the previous page
(2) NG
Check the following connector:
C-122
NG
Repair
OK
Check and repair the harness between
the air flow sensor and engine-A/T-
ECU.
