DaimlerChrysler Jeep Grand Cherokee 2002, Руководство по обслуживанию

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TEST ACTION APPLICABILITY
8 Turn the ignition off.
Using the DRBIII
t
lab scope, backprobe both of the CKP Sensor Signal circuits at the
ECM harness connector.
NOTE: Refer to Charts and Graphs to view a correct CKP Sensor signal.
Start the engine, if the engine will not start, crank the engine for several seconds
while monitoring the DRBIII
t
.
Does the DRBIII
t
display a steady clean CKP Signal pattern for each circuit?
All
Yes
→
Go To 9
No
→
Perform Test for DTC P0340-Crankshaft Position Sensor Circuit
Dynamic Plausibility.
Perform NO START VERIFICATION - VER-1.
9 Refer to the Service Information and perform the fuel pressure test.
Is the fuel pressure within specification? All
Yes
→
Go To 10
No
→
Repair as necessary.
Perform NO START VERIFICATION - VER-1.
10 Refer to the Service Information and perform the fuel pressure test. Note the test
results.
Using the DRBIII
t
, read the Fuel Pressure and compare the two readings.
Are the two readings within 3450 kPa (500 PSI) of each other?
All
Yes
→
Go To 11
No
→
Go To 13
11 Refer to the Service Information to ensure the Engine Drive Gears/Sprocket are
installed correctly and the camshaft and crankshaft gears are timed correctly.
Were any problems found? All
Yes
→
Repair as necessary.
Perform NO START VERIFICATION - VER-1.
No
→
Go To 12
12 Inspect the fuel supply for contamination.
Is the fuel contaminated? All
Yes
→
Check the fuel supply for contamination.
Perform NO START VERIFICATION - VER-1.
No
→
Replace and program the Engine Control Module in accordance
with the Service Information.
Perform NO START VERIFICATION - VER-1.
13 Turn the ignition off.
Disconnect the Fuel Pressure Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Fuel Pressure Sensor Signal circuit.
Is the resistance below 10.0 ohms? All
Yes
→
Go To 14
No
→
Repair the Fuel Pressure Sensor Signal circuit for an open.
Perform NO START VERIFICATION - VER-1.
236
DRIVEABILITY - DIESEL
*ENGINE CRANKS BUT WILL NOT START —
Continued
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