Dodge Ram Truck 1500-2500-3500. Manual — part 1147
P0052-O2 SENSOR 2/1 HEATER CIRCUIT HIGH (CONTINUED)
6.
PCM
NOTE: Before continuing, check the PCM harness connector terminals for corrosion, damage, or terminal
push out. Repair as necessary.
Using the schematics as a guide, inspect the wire harness and connectors. Pay particular attention to all Power and
Ground circuits.
If there are no possible causes remaining, view repair.
Repair
Replace and program the Powertrain Control Module per Service Information.
Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
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ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10
DR/DH
P0071-AMBIENT/BATTERY TEMP SENSOR PERFORMANCE
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10
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P0071-AMBIENT/BATTERY TEMP SENSOR PERFORMANCE (CONTINUED)
For the Engine circuit diagram (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/ENGINE CON-
TROL MODULE - SCHEMATIC - ELECTRICAL)
For a complete wiring diagram Refer to Section 8W.
•
When Monitored:
With the ignition on and no Battery Temperature Sensor Open or Short Faults present.
•
Set Condition:
After 5 warm cycles have occurred (coolant increases at least 22°C (40°F) to a minimum of 71°C (160°F) and
the odometer mileage has increased 196.6 miles and the Battery Temperature has changed less than 4°C
(7.2°F) change in temperature. One trip fault.
Possible Causes
GOOD TRIP EQUAL TO ZERO
(K25) BATTERY TEMP SIGNAL CIRCUIT SHORTED TO VOLTAGE
BATTERY TEMPERATURE SENSOR
RESISTANCE IN THE (K25) BATTERY TEMP SENSOR SIGNAL CIRCUIT
RESISTANCE IN THE (K900) SENSOR GROUND CIRCUIT
(K25) BATTERY TEMP SENSOR SIGNAL CIRCUIT SHORTED TO GROUND
PCM
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
1.
GOOD TRIP EQUAL TO ZERO
Ignition on, engine not running.
With the scan tool, read DTCs and record the related Freeze Frame data.
Is the Good Trip Counter equal to zero?
Yes
>> Go To 2
No
>> Refer to the INTERMITTENT CONDITION Symptom. (Refer to 9 - ENGINE - DIAGNOSIS AND TEST-
ING)
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ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10
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P0071-AMBIENT/BATTERY TEMP SENSOR PERFORMANCE (CONTINUED)
2.
(K25) BATTERY TEMP SIGNAL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Battery Temp Sensor harness connector.
Ignition on, engine not running.
Measure the voltage on the (K25) Battery Temp Signal circuit at the
Sensor connector.
Is the voltage above 5.2 volts?
Yes
>> Repair the short to voltage on the (K25) Batt Temp Signal
circuit.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9
- ENGINE - STANDARD PROCEDURE)
No
>> Go To 3
3.
(K25) BATTERY TEMP SENSOR SIGNAL
With the scan tool, read the Battery Temp Sensor voltage with the Batt Temp Sensor still disconnected.
Is the voltage above 4.6 volts?
Yes
>> Go To 4
No
>> Go To 7
4.
BATTERY TEMPERATURE SENSOR
Connect a jumper wire between the (K25) Battery Temp Signal circuit and the (K900) Sensor ground circuit at the
Sensor harness connector.
With the scan tool, read the Battery Temp Sensor voltage.
Is the voltage below 1.0 volt?
Yes
>> Replace the Battery Temperature Sensor.
Perform POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)
No
>> Go To 5
NOTE: Remove the jumper wire before continuing.
DR/DH
ENGINE - ELECTRICAL DIAGNOSTICS - SRT-10
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