DaimlerChrysler Jeep Grand Cherokee 2002 Service Manual page 248

DRIVEABILITY - DIESEL
*ENGINE WILL NOT CRANK —
TEST
9 Using a 12-volt test light connected to ground, check the Ignition Switch Start
Output circuit at ECM C1 harness connector cavity 22 while turning the ignition
switch to the START position.
Does the test light illuminate with the ignition switch in the START position?
Yes → Replace and program the Engine Control Module in accordance
→ Repair the Ignition Switch Start Output circuit at the ECM
No
10 Remove the Starter Relay from the PDC.
Using a 12-volt test light connected to ground, check the Fused B+ circuit in the
Starter Relay connector in the PDC.
Is the test light on?
Yes → Go To 11
→ Repair the Fused B(+) circuit for an open.
No
11 Turn the ignition off.
Remove the Starter Relay from the PDC.
Disconnect the Starter Relay Output wire from the Starter Solenoid.
Connect the Starter Relay Output wire (at the Starter) to ground.
Using a 12-volt test light connected to 12-volts, check the Starter Relay Output
circuit at the Starter Relay connector in the PDC.
Does the test light illuminate brightly?
Yes → Go To 12
→ Repair the Starter Relay Output circuit for an open.
No
12 Using the Service Information, check the battery cables for high resistance.
Did either battery cable have a voltage drop greater than 0.2 volts?
Yes → Replace the battery cable(s).
→ Go To 13
No
13 Turn the ignition off.
Attempt to manually rotate the crankshaft 360°.
Is the crankshaft able to rotate 360°?
Yes → Replace the Starter Motor.
→ Repair the engine mechanical problem.
No
Continued
ACTION
with the Service Information.
Perform NO START VERIFICATION - VER-1.
harness connector for an open.
Perform NO START VERIFICATION - VER-1.
Perform NO START VERIFICATION - VER-1.
Perform NO START VERIFICATION - VER-1.
Perform NO START VERIFICATION - VER-1.
Perform NO START VERIFICATION - VER-1.
Perform NO START VERIFICATION - VER-1.
240
APPLICABILITY
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