User Manual

Chapter 10
BOSCH HDI EDC 15C2 INJECTION SYSTEM AND PARTICLE FILTER
68
IV - EXHAUST GAS TEMPERATURE SENSOR (UPSTREAM OF THE CATALYTIC
CONVERTER) (1344)
A - ROLE
The temperature sensor informs the injection ECU of the temperature of the
exhaust gases (upstream of the catalytic converter).
B - DESCRIPTION
SDI018C
The sensor consists of a Negative Temperature Coefficient resistor (NTC).
The higher the temperature, the lower its resistance.
C - ELECTRICAL FEATURES
Allocation of connector channels:
• channel 1: 5 volts,
• channel 2: earth.
Resistance at 100°C = 96 000 ohms.
Resistance at 450°C = 762 ohms.
Warning: The electrical information provided by the upstream temperature
sensor is transmitted directly to the injection ECU.
D - LOCATION
The temperature sensor is located upstream of the catalytic converter.
The temperature sensor is screwed onto a base.
IMPORTANT: Use the correct tightening torque.
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