Mazda MX-6 1998, Руководство по ремонту

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CONTROL SYSTEM [KL]
6. Decrease the applied pressure from +6.66 kPa
{+50 mmHg, +1.97 inHg} to -6 .6 6 kPa {-50
mmHg, -1 .9 7 inHg} and verify that the PCM
terminal 62 voltage decreases accordingly as
specified.
Specification
Applied vacuum
Output voltage (V)*
-6.66 kPa
(-50 mmHg, -1.97 InHg}
0.45—0.55
0 kPa {0 mmHg, 0 inHg} 2.25—2.75
+6.66 kPa
{+50 mmHg, +1.97 inHg}
4.05—4.95
• : Measuring condition is following.
• Input voltage: 5.0 V
• Atmospheric pressure: 101.3 kPa {760 mmHg, 29.9 inHg}
(Absolute pressure)
• Outside temperature: 30—100 'C (0— 182 ” F}
7. If not as specified, perform the following
inspection.
(r.
:
x n
HARNESS SIDE CONNECTOR
(VIEW FROM VEHICLE HARNESS CONNECTOR)
W 6 U 1 4 0 W N J
(1) Harness continuity
• Between PCM terminal 91 and fuel tank
pressure sensor terminal A
• Between PCM terminal
62
and fuel tank
pressure sensor terminal B
• Between PCM terminal 90 and fuel tank
pressure sensor terminal C
(2)
If there is no continuity, repair or replace
related harness.
(3) Terminal voltage (Ignition switch ON)
• Fuel tank pressure sensor terminal A voltage:
Ground (Below 1.0
V)
• Fuel tank pressure sensor terminal C voltage:
Constant voltage
(4 .5
—
5 .5 V)
(4)
If terminal voltage is incorrect, check the
PCM.
2. Select the “PID/DATA MONITOR AND RECORD”
function on the NGS tester display and press
TRIGGER.
3. Select “FTP V” on the NGS tester display and
press START. The NGS tester measure and
shows the voltage.
4. Turn the ignition switch to ON.
Caution
•
Do not apply a vacuum outside of the
specified limits. Doing so will damage the
fuel tank pressure sensor.
5. Apply pressure then a vacuum to the fuel tank
pressure sensor according to the following
procedure.
FUEL TANK PRESSURE SENSOR
Note
• The output voltage varies with the measuring
condition.
6. Decrease the applied pressure from +6.66 kPa
{+50 mmHg, +1.97 inHg} to -6 .6 6 kPa {-5 0
mmHg, -1 .9 7 inHg} and verify that the “FTP V”
voltage decreases accordingly as specified.
8. If terminal voltage is correct and if there is
harness continuity, replace the fuel tank pressure
Specification
sensor.
Applied vacuum “FTP V” voltage (V)*
Using the SSTs (NGS Tester)
-6.66 kPa
{-50 mmHg, -1.97 inHg}
0.45—0.55
Note
0 kPa {0 mmHg, 0 inHg}
2.25—2.75
• The following vacuum values are indicated by
relative pressure from atmospheric pressure.
+6.66 kPa
{+50 mmHg, +1.97 inHg}
4.05—4.95
1. Connect the SSTs (NGS tester) to the data link
connector.
• : Measuring condition is following.
• Input voltage: 5.0 V
• Atmospheric pressure: 101.3 KPa {760 mmHg, 29.9 inHg)
(Absolute pressure)
• Outside temperature:
30
—
100 "C {0
—
182 ” F}
4 9 T 0 8 8 0 A 0
4 9 T 0 8 8 0 1 0E
BATTERY
W 6 U 1 4 0 W M Y
0 1 -4 0 B -2 7