JAC J2 - Page 181



Maintenance Manual for J2 Sedan
Electronic Control System
of Engine
180
4. Diagnosis


Sensor short circuit (to ground, to power supply);

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Sensor circuit open;

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Sensor detects the intake pressure exceeds the upper limit;

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Sensor detects the Intake pressure exceeds the lower limit;
5. Trouble Solution


Mainly check the 4 connections of the sensor and connection with ECU for short circuit, open
circuit;

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Check sensor detection holes for blockage.

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Whether a short circuit, open circuit, grounding problem exists in sensor wiring harness


Whether sensor is highly impacted resulting in sensor failure.

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Operating pressure range: 12.5kPa - 115kPa


Operating temperature range: -40 - 125
℃
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6.
Dismantlement
and
Installation
1) Dismantlement
①

Disconnect the
wire
harness connectors of intake
manifold pressure & temperature sensors.
Attention:
■
Make sure that the ignition switch is at “Off”
position.

②

Disassemble the fixing screws of
the intake
pressure/te
mperature
sensor with
crosshead scr
ew
driver, remove the sensor.
2) Installation
Be aware of following precautions and install with steps contrary to dismantlement.
Fig.4.3.002
Fig.4.3.003