Mazda Protege 5. Manual - part 183
CONTROL SYSTEM [FS]
01–40B–41
01–40B
5. Apply pressure then vacuum to the fuel tank
pressure sensor according to the following
procedure.
Note
•
The output voltage varies with the
measuring condition.
6. Decrease the applied pressure from +6.66 kPa
{+50 mmHg, +1.97 inHg} to –6.66 kPa {–50
mmHg, –1.97 inHg} and verify that the PCM
terminal 62 voltage decreases accordingly as
specified.
•
If not as specified, replace the fuel tank
pressure sensor.
•
If fuel tank pressure sensor is okay, but PCM terminal 62 voltage is out of specification, carry out the
“Circuit Open/Short Inspection”.
Specification
*
: Measuring condition is as follows
Input voltage: 5.0 V
Barometric pressure: 101.3 kPa {760 mmHg, 29.9 inHg} (Absolute pressure)
Barometric temperature: 30—100
°°°°
C {0—182
°°°°
F}
Circuit Open/Short Inspection
1. Remove the PCM. (See 01–40B–7 PCM REMOVAL/INSTALLATION [FS].)
2. Connect the SST (104 Pin Breakout Box) to the
PCM as shown.
3. Tighten the connector attaching screw.
Tightening torque
7.9—10.7 N·m
{80—110 kgf·cm, 69.5—95.4 in·lbf}
4. Inspect for an open or short circuit in the following
wiring harnesses by probing the applicable
sensor and SST (104 Pin Breakout Box) terminals
with ohmmeter leads.
•
If there is an open or short circuit, repair or
replace wiring harnesses.
•
If there is no open or short circuit, replace the fuel tank pressure sensor.
Open circuit
•
Fuel tank pressure signal circuit (Fuel tank pressure sensor connector terminal B and PCM connector
terminal 62)
•
Constant voltage circuit (Fuel tank pressure sensor connector terminal C and PCM connector terminal 90)
•
GND circuit (Fuel tank pressure sensor connector terminal A and PCM connector terminal 91)
Applied pressure
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
X3U140WB4
X3U140WB3
1712-1U-01G(01-40B).fm 41 ページ ２００１年６月２９日 金曜日 午前９時５１分