Dodge Ram Truck 1500-2500-3500. Manual — part 1090

P0500-NO VEHICLE SPEED SENSOR SIGNAL (CONTINUED)

2.

VEHICLE SPEED SENSOR (B22) SIGNAL CIRCUIT OPEN BETWEEN CAB AND ECM

Turn the ignition off.

Measure the resistance of the Vehicle Speed (B22) signal circuit
between the ECM harness connector and the ABS/RWAL harness
connector.

Is the resistance above 5.0 ohms?

Yes

>> Repair the open in the Vehicle Speed (B22) signal circuit

between the CAB and ECM.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

No

>> Go To 3

3.

VEHICLE SPEED SENSOR (B22) SIGNAL CIRCUIT SHORT TO GROUND

Measure the resistance between ground and the Vehicle Speed (B22)
signal circuit at the ECM harness connector.

Is the resistance below 100 ohms?

Yes

>> Repair the short to ground in the Vehicle Speed (B22) sig-

nal circuit between the CAB and ECM.

Perform POWERTRAIN VERIFICATION TEST VER - 1
(DIESEL). (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/ENGINE CONTROL MODULE - DIAG-
NOSIS AND TESTING)

No

>> Go To 4

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ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0500-NO VEHICLE SPEED SENSOR SIGNAL (CONTINUED)

4.

ECM

NOTE: Before continuing, check the ECM 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 ECM per Service Information.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1283

P0514-BAT TEMPERATURE SENSOR RATIONALITY

9 - 1284

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

DR/DH

P0514-BAT TEMPERATURE SENSOR RATIONALITY (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:
While the engine is running.

•

Set Condition:
The ECM does not read a change in value from the sensor over time.

Possible Causes

BATTERY TEMP SENSOR

INTERMITTENT CONDITION

Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)

Diagnostic Test

1.

BATTERY TEMP SENSOR

Remove the temperature sensor and reconnect the wiring harness connector to the sensor.

Monitor scan tool, while heating the sensor with an external heat source (DO NOT USE OPEN FLAME).

Does the reading from the sensor increase at least 5 degrees F. on the scan tool?

Yes

>> Refer to the INTERMITTENT CONDITION Symptom (Diagnostic Procedure). (Refer to 9 - ENGINE -

DIAGNOSIS AND TESTING)

No

>> Replace the battery temperature sensor.

Perform POWERTRAIN VERIFICATION TEST VER - 1 (DIESEL). (Refer to 8 - ELECTRICAL/ELEC-
TRONIC CONTROL MODULES/ENGINE CONTROL MODULE - DIAGNOSIS AND TESTING)

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - DIESEL

9 - 1285