DaimlerChrysler Jeep Grand Cherokee 2002 Service Manual page 193

P1499-HYDRAULIC COOLING FAN SOLENOID CIRCUIT OPEN CIRCUIT
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Continued
TEST
3 Turn the ignition off.
Disconnect the Hydraulic Cooling Fan Solenoid harness connector.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Swirl Solenoid Control circuit.
Is the resistance above 1000 ohms?
Yes → Go To 4
→ Repair the Hydraulic Cooling Fan Solenoid Control circuit for a
No
4 Turn the ignition off.
Disconnect the Hydraulic Cooling Fan Solenoid harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Swirl Solenoid Control circuit.
Is the resistance below 10.0 ohms?
Yes → Go To 5
→ Repair the Hydraulic Cooling Fan Solenoid Control circuit for an
No
5 Turn the ignition off.
Install a substitute Hydraulic Cooling Fan Solenoid in place of the vehicle's
Hydraulic Cooling Fan Solenoid.
NOTE: Ensure the ECM and Hydraulic Cooling Fan Solenoid harness
connectors are connected.
Turn the ignition on.
With the DRBIII , actuate the Hydraulic Cooling Fan Solenoid.
With the DRB, check for this DTC to set again.
Did this DTC set again?
Yes → Replace and program the Engine Control Module in accordance
→ Replace the Hydraulic Cooling Fan Solenoid.
No
ACTION
short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
open.
Perform ROAD TEST VERIFICATION - VER-2.
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
Perform ROAD TEST VERIFICATION - VER-2.
DRIVEABILITY - DIESEL
185
APPLICABILITY
All
All
All