Quote:
Originally Posted by kevinc
I replaced the coolant temp sensor that is located on the block between cylinders 1 and 3. I did not know there were 2.
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Not shocking. Most rigs since the very late 1990's have largely digital clusters with analog displays (stepper motors driving needles). They use one ECT sensor to the PCM. From there the PCM drives the instrument cluster over Class II serial or CAN databuss.
Both generations of the T400 platform receive analog signals to the analog gauges (air core driven gauges) direct from the engine sensors and the Speed sensor buffer to the odometer/speedometer with separate ECM sensors where needed.
Quote:
Originally Posted by kevinc
Upon looking, is the second coolant sensor right next to the thermostat housing on the intake?
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Yup. That would be the ECM ECT sensor.
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1959 M35A2 LDT465-1D SOLD
1967 Dodge W200 B383, NP420/NP201 SOLD
1969 Dodge Polara 500 B383, A833 SOLD
1972 Ford F250 FE390, NP435/NP205 SOLD
1976 Chevy K20, 6.5L, NV4500/NP208 SOLD
1986 M1008 CUCV SOLD
2000 GMC C2500, TD6.5L, NV4500
2005 Chevy Silverado LS 2500HD 6.0L 4L80E/NP263
2009 Impala SS LS4 V8
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