DaimlerChrysler Jeep Grand Cherokee 2002, Service Manual

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Symptom:
P0651-SENSOR REFERENCE VOLTAGE B CKT VOLTAGE TOO LOW
When Monitored and Set Condition:
P0651-SENSOR REFERENCE VOLTAGE B CKT VOLTAGE TOO LOW
When Monitored: With the ignition on.
Set Condition: The ECM detects a short to ground on the Sensor Reference Voltage B
circuit, or a short to ground on the Accelerator Pedal Position Sensor 5-Volt Supply circuit.
POSSIBLE CAUSES
INTERMITTENT CONDITION
A/C PRESS, OIL PRESS, BOOST PRESS, OR APP SENSOR SHORTED TO GROUND
SENSOR REFERENCE VOLTAGE B CIRCUIT SHORTED TO GROUND
SENSOR REFERENCE VOLTAGE B CIRCUIT SHORTED TO SENSOR GROUND
ACCELERATOR PEDAL POSITION SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND
ACCELERATOR PEDAL POSITION SENSOR 5-VOLT SUPPLY CIRCUIT SHORTED TO SENSOR
GROUND
ENGINE CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRB, erase ECM DTCs.
Monitor the DRB for ECM DTCs.
Did this DTC set again? All
Yes
→
Go To 2
No
→
Go To 8
146
DRIVEABILITY - DIESEL
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