Jeep XJ. Manual — part 869
TEST
ACTION
APPLICABILITY
13
Turn the ignition off.
Remove the Fuel Pump Relay from the PDC.
Disconnect the Fuel Pump Module harness connector.
NOTE: Check connectors - It is critical that the connector is free from any
signs of corrosion or deformities
Measure the resistance of the Fuel Pump Relay Output circuit from the relay
connector to the fuel pump module connector.
Is the resistance below 5.0 ohms?
All
Yes
→
Replace the Fuel Pump Relay
Perform POWERTRAIN VERIFICATION TEST VER - 1.
No
→
Repair the open fuel pump relay output circuit.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
237
STARTING
*ENGINE CRANKS DOES NOT START —
Continued
Symptom:
*NO CRANK CONDITION
POSSIBLE CAUSES
STARTER RELAY OUTPUT CIRCUIT OPEN
BATTERY CIRCUIT RESISTANCE TOO HIGH
STARTER RELAY AUTO
STARTER (AUTO TRANS)
REPAIR MECHANICAL CONDITION
STARTER RELAY GROUND OPEN CIRCUIT
STARTER RELAY MANUAL
FUSED B(+) CIRCUIT OPEN
IGNITION SWITCH OUTPUT CIRCUIT OPEN
PARK/NEUTRAL SWITCH SENSE CIRCUIT OPEN
TEST
ACTION
APPLICABILITY
1
Is the vehicle equipped with a manual transmission?
Is the vehicle equipped with a manual transmission?
All
Yes
→
No
→
2
Turn the ignition off.
Remove the starter relay.
Using a 12-volt Test Light connected to 12-volts, check the starter ground circuit.
Is the test light on?
All
Yes
→
No
→
Repair the starter relay ground circuit for an open.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
3
Turn the ignition off.
Remove the starter relay.
Disconnect the starter relay output wire from the starter solenoid.
Connect one end of the starter relay output circuit to ground.
Using a 12-volt test light connected to 12-volts, check the other end of the starter
relay output circuit.
Is the test light on?
All
Yes
→
No
→
Repair open Starter Relay Output Ckt.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
4
Turn the ignition off.
Check the battery cables for high resistance. (Use service procedure)
Did either battery circuit have a voltage drop greater than 0.2 volt?
All
Yes
→
Repair the Battery Circuit for high resistance.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
No
→
238
STARTING
TEST
ACTION
APPLICABILITY
5
Turn the ignition off.
Remove the starter relay.
Using a 12-volt test light connected to ground, check the fused B(+) circuit.
Is the test light on?
All
Yes
→
No
→
Repair the Fused B(+) Circuit for an open or high resistance.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
6
Ensure the engine crankshaft is able to rotate and is not seized.
Is the engine crankshaft able to rotate?
All
Yes
→
No
→
Repair the mechanical condition preventing the starter motor
from cranking.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
7
Turn the ignition off.
Remove the starter relay.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the ignition switch output
circuit.
Note: If equipped with a manual transmission, the clutch pedal must be
fully depressed for this test.
While observing 12-volt test light, hold ignition key in the start position.
Is the test light on?
All
Yes
→
No
→
Repair the Ignition Switch Output Circuit for an open or high
resistance.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
8
Turn the ignition off.
Remove the starter relay.
WARNING: The parking brake must be on and the transmission must be in
park for a vehicle equipped with an automatic transmission or in neutral
for a vehicle equipped with a manual transmission.
WARNING: The engine may be cranked in the next step. Keep away from
moving engine parts.
Briefly connect a jumper wire between starter relay fused B(+) circuit and starter
relay output circuit.
Did the starter motor crank the engine?
All
Yes
→
Replace the starter relay.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
No
→
9
If there are no possible causes remaining, replace the starter motor.
View repair options
All
Repair
Test Complete.
239
STARTING
*NO CRANK CONDITION —
Continued
TEST
ACTION
APPLICABILITY
10
Turn the ignition off.
Remove the starter relay.
Disconnect the starter relay output wire from the starter solenoid.
Connect one end of the starter relay output circuit to ground.
Using a 12-volt test light connected to 12-volts, check the other end of the starter
relay output circuit.
Is the test light on?
All
Yes
→
No
→
Repair open Starter Relay Output Ckt.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
11
Turn the ignition off.
Check the battery cables for high resistance. (Use service procedure)
Did either battery circuit have a voltage drop greater than 0.2 volt?
All
Yes
→
Repair the Battery Circuit for high resistance.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
No
→
12
Turn the ignition off.
Remove the starter relay.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the fused B(+) circuit.
Is the test light on?
All
Yes
→
No
→
Repair the Fused B(+) Circuit for an open or high resistance.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
13
Turn the ignition off.
Remove the starter relay.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the ignition switch output
circuit.
Note: If equipped with a manual transmission, the clutch pedal must be
fully depressed for this test.
While observing 12-volt test light, hold ignition key in the start position.
Is the test light on?
All
Yes
→
No
→
Repair the Ignition Switch Output Circuit for an open or high
resistance.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
14
Ensure the engine crankshaft is able to rotate and is not seized.
Is the engine crankshaft able to rotate?
All
Yes
→
No
→
Repair the mechanical condition preventing the starter motor
from cranking.
Perform POWERTRAIN VERIFICATION TEST VER - 1.
240
STARTING
*NO CRANK CONDITION —
Continued
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