DaimlerChrysler Jeep Grand Cherokee 2002 Service Manual page 110

DRIVEABILITY - DIESEL
P0514-BATTERY TEMP SENSOR CIRCUIT SIGNAL VOLTAGE TOO HIGH
—
Continued
TEST
3 Turn the ignition off.
Disconnect the Battery Temperature Sensor harness connector.
Connect a jumper wire between the Battery Temperature Sensor harness connector
cavities.
Turn the ignition on.
With the DRB, read the Battery Temperature Sensor voltage.
Is the voltage below 1.0 volt?
Yes → Replace the Battery Temperature Sensor in accordance with the
→ Go To 4
No
4 Turn the ignition off.
Disconnect the Battery Temperature Sensor harness connector.
Connect a jumper wire between ground and the Battery Temperature Sensor Signal
circuit.
Turn the ignition on.
With the DRB, read the Battery Temperature Sensor voltage.
Is the voltage below 1.0 volt?
Yes → Repair the Sensor Ground circuit for an open.
→ Go To 5
No
5 Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the Battery Temperature Sensor harness connector.
Measure the resistance of the Battery Temperature Sensor Signal circuit.
Is the resistance below 5.0 ohms?
Yes → Replace and program the Engine Control Module in accordance
→ Repair the Battery Temperature Sensor Signal circuit for an open.
No
6 WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?
Yes → Repair as necessary.
→ Test Complete.
No
ACTION
Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
102
APPLICABILITY
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