Circuit description
Exhaust
temperature
sensor consists of a Pt-200 sen-
sor where the resistance changes depending on
exhaust temperature. The resistance increases with
rising exhaust temperature.
Pin 44 on the engine control unit (EMS2) connector B
provides pin 2 on the sensor with an operating voltage
of +5 Volt. Pin 1 on the sensor is connected to battery
negative via pin 18 on the EMS2. The voltage drop
across the sensor changes as exhaust temperature
changes.
Measurements
Checking signal cable, exhaust gas temperature
sensor page 163
Checking negative cable, exhaust gas temperature
sensor page 164
Checking exhaust gas temperature sensor page 164
P0013504
(-)18
(+)44
SB
VO
EMS2
2
2
2
1
1
1
A
B
P0013505
A Connector B
B Exhaust temperature sensor
30-2 Fault Tracing
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