RAM 2500 Truck 2WD L6-6.7L DSL Turbo (2010)
No
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Check the 5-volt supply circuit for an open or short to ground. Perform the appropriate Sensor Reference Voltage DTC diagnostic procedure for
assistance, if one exists.
2. MEASURE THE VOLTAGE BETWEEN THE 5-VOLT SUPPLY AND SENSOR GROUND CIRCUIT
1. The multimeter is still set to measure DC voltage.
2. Move the negative lead of the meter to carefully probe the sensor ground or sensor return circuit in the harness connector.
3. With the positive lead of the meter, carefully probe the 5-volt supply circuit.
Is the voltage between 4.8 and 5.2 volts?
Yes
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At this time the 5-volt supply and sensor ground circuit are working properly. Continue to measure the voltage between the wires, wiggle the wire
harness and connectors while checking for an intermittent condition.
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Use the wiring application as a guide to trace the circuits and look for any in-line connectors where the short could occur intermittently.
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Look for any chafed, pierced, pinched, or partially broken wires.
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Look for broken, bent, pushed out or corroded terminals. Verify that there is good pin to terminal contact in the related wire harness connectors.
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Perform any Technical Service Bulletins (TSBs) that may apply.
No
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Repair the open or excessive resistance in the Sensor Ground (Sensor Return) circuit.
Testing For A Voltage Drop
VOLTAGE DROP TEST
Theory of Operation
Voltage drop is the reduction in voltage in an electrical circuit between the source and load components. The wires and connectors of a circuit should
contain next to no resistance. All the voltage should be used through the load. The "load" is the component using the power, such as a light, starter, or
blower motor. If a circuit has excessive resistance, it prevents the wire from carrying sufficient current under high load conditions. A voltage drop test is
an effective way to find excessive resistance in connections and circuits. To preform a voltage drop test, a Digital Volt Ohm Meter (DVOM) is used to
measure the voltage drop across a live circuit or connection while it is under the load. If the circuit or connection being tested has excessive resistance,
the DVOM will measure the voltage that the resistance is using. Little or no voltage drop should be read, ideally less that 0.4 of a volt, anything greater
indicates excessive resistance and the circuit or connection should be inspected for cleaning or repair.
