CAN BUS
Fleet Owner
Joined: Nov 2003
Posts: 27,881
Likes: 3,595
Couple of things -
The EOT sensor is on a 5V reference circuit. Shorting out this circuit (sensor, connector, or wiring harness) can impact PCM operation. EOT is used for numerous things:
If the oil temperature sensor indicates (even falsely) that the engine is over 131 *F, the glow plugs will not come on.
In the '03 engine "Inferred EBP Strategy". EOT is somehow used in the process to estimate/infer the EBP value.
EOT is also used by the FICM in its fueling calculations.
So - bottom line .................
With the EOT sensor shorted out, the glow plugs and fuel system will be getting the wrong information from the computers causing: poor operation, or even a no start can occur (glow plugs and/or low computer reference voltage) and white smoke (excess fuel) situation. Pretty uncommon for a no-start though.
You should have stored codes if you have a good code reader (ie ForScan). You should also be able to retrieve PCM data for v-reference voltage.
The EOT sensor is on a 5V reference circuit. Shorting out this circuit (sensor, connector, or wiring harness) can impact PCM operation. EOT is used for numerous things:
If the oil temperature sensor indicates (even falsely) that the engine is over 131 *F, the glow plugs will not come on.
In the '03 engine "Inferred EBP Strategy". EOT is somehow used in the process to estimate/infer the EBP value.
EOT is also used by the FICM in its fueling calculations.
So - bottom line .................
With the EOT sensor shorted out, the glow plugs and fuel system will be getting the wrong information from the computers causing: poor operation, or even a no start can occur (glow plugs and/or low computer reference voltage) and white smoke (excess fuel) situation. Pretty uncommon for a no-start though.
You should have stored codes if you have a good code reader (ie ForScan). You should also be able to retrieve PCM data for v-reference voltage.
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