Chrysler Town, Dodge Caravan. Manual — part 1173
Symptom:
*ENGINE WILL NOT CRANK
POSSIBLE CAUSES
BATTERY CABLE HIGH RESISTANCE
BATTERY CABLES
CLUTCH INTERLOCK SWITCH
CLUTCH INTERLOCK SWITCH OUTPUT CIRCUIT
ECM
IGNITION SWITCH START OUTPUT CIRCUIT OPEN
IGNITION SWITCH START OUTPUT CIRCUIT OPEN
MECHANICAL PROBLEM
OPEN FUSED BATTERY (+) CIRCUIT
SKIM CODES PRESENT
STARTER MOTOR
STARTER RELAY
STARTER RELAY CONTROL CIRCUIT OPEN
STARTER RELAY CONTROL CIRCUIT SHORTED TO VOLTAGE
STARTER RELAY OUTPUT CIRCUIT OPEN
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
NOTE: The battery must be fully charged before diagnosing a no crank
condition.
Inspect the battery cables for corrosion, looseness or other problems.
Is there evidence of problems?
All
Yes
→ Repair as necessary.
Perform NO START VERIFICATION - VER-1.
No
→ Go To 2
2
Turn the ignition on.
With the DRBIII
t, read the SKIM DTCs.
Does the DRBIII
t display any SKIM DTCs?
All
Yes
→ Refer to symptom list for problems related to SKIM.
Perform NO START VERIFICATION - VER-1.
No
→ Go To 3
235
DRIVEABILITY - DIESEL
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Remove the Starter Relay from the IPM.
WARNING: THE TRANSMISSION MUST BE IN NEUTRAL AND THE PARK
BRAKE MUST BE SET FOR THIS TEST.
WARNING: THE ENGINE MAY CRANK IN THE NEXT STEP. WHEN THE
ENGINE IS CRANKING, 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.
Momentarily jumper Starter Relay connector cavities 30 and 87 in the IPM
connector.
Did the engine crank?
All
Yes
→ Go To 4
No
→ Go To 11
4
Remove the Starter Relay from the IPM.
Using a 12-volt test light connected to ground, check the Ignition Switch Start
Output circuit while fully depressing the clutch pedal and turning the ignition switch
to the START position.
Does the test light illuminate with the ignition switch in the START position?
All
Yes
→ Go To 5
No
→ Go To 9
5
Turn the ignition off.
Remove the Starter Relay from the IPM.
Install a substitute relay in place of the Starter Relay.
Attempt to start the engine.
Does the engine crank?
All
Yes
→ Replace the Starter Relay.
Perform NO START VERIFICATION - VER-1.
No
→ Go To 6
6
Turn the ignition off.
Disconnect the ECM harness connectors.
Using a 12-volt test light connected to ground, probe ECM harness connector cavity
49 while fully depressing the clutch pedal and turning the ignition switch to the
START position.
Does the test light illuminate while the ignition is in the Start position.
All
Yes
→ Go To 7
No
→ Repair the Ignition Switch Start Output circuit to the ECM.
Perform NO START VERIFICATION - VER-1.
236
DRIVEABILITY - DIESEL
*ENGINE WILL NOT CRANK —
Continued
TEST
ACTION
APPLICABILITY
7
Turn the ignition off.
Disconnect the ECM harness connectors.
Remove the Starter Relay from the IPM.
Remove the ECM/PCM Relay from the IPM.
Using a jumper wire, connect ECM/PCM relay connector cavities 30 and 87 in the
IPM.
Turn the ignition on.
Measure the voltage of the Starter Relay Control circuit.
Is the voltage above 1.0 volt?
All
Yes
→ Repair the Starter Relay Control circuit for a short to voltage.
Perform NO START VERIFICATION - VER-1.
No
→ Go To 8
8
Turn the ignition off.
Disconnect the ECM harness connectors.
Remove the Starter Relay from the IPM.
Measure the resistance of the Starter Relay Control circuit.
Is the resistance below 10.0 ohms?
All
Yes
→ Replace and program the ECM in accordance with the Service
Information.
Perform NO START VERIFICATION - VER-1.
No
→ Repair the Starter Relay Control circuit for an open.
Perform NO START VERIFICATION - VER-1.
9
Turn the ignition off.
Remove the Starter Relay from the IPM.
Disconnect the Clutch Interlock Switch harness connector.
Connect a jumper wire across the Clutch Interlock Switch harness connector.
Using a 12-volt test light connected to ground, check the Ignition Switch Start
Output circuit at the Starter Relay connector in the IPM and turning the ignition
switch to the crank position.
Does the test light illuminate with the ignition switch in the crank position?
All
Yes
→ Replace the Clutch Interlock Switch.
Perform NO START VERIFICATION - VER-1.
No
→ Go To 10
10
Turn the ignition off.
Disconnect the Clutch Interlock Switch harness connector.
Remove the Starter Relay from the IPM.
Measure the resistance of the Clutch Interlock Switch Output circuit between the
IPM and the Clutch Interlock Switch harness connector.
Is the resistance below 10.0 ohms??
All
Yes
→ Repair the Ignition Switch Start Output circuit to the Clutch
Interlock Switch.
Perform NO START VERIFICATION - VER-1.
No
→ Repair the Clutch Interlock Switch Output circuit for an open.
Perform NO START VERIFICATION - VER-1.
237
DRIVEABILITY - DIESEL
*ENGINE WILL NOT CRANK —
Continued
TEST
ACTION
APPLICABILITY
11
Remove the Starter Relay from the IPM.
Using a 12-volt test light connected to ground, check the Fused B+ circuit.
Is the test light on?
All
Yes
→ Go To 12
No
→ Repair the Fused B(+) circuit for an open.
Perform NO START VERIFICATION - VER-1.
12
Turn the ignition off.
Remove the Starter Relay from the IPM.
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 IPM.
Does the test light illuminate brightly?
All
Yes
→ Go To 13
No
→ Repair the Starter Relay Output circuit for an open.
Perform NO START VERIFICATION - VER-1.
13
Using the Service Information, check the battery cables for high resistance.
Did either battery cable have a voltage drop greater than 0.2 volts?
All
Yes
→ Replace the battery cable(s).
Perform NO START VERIFICATION - VER-1.
No
→ Go To 14
14
Turn the ignition off.
Attempt to manually rotate the crankshaft 360°.
Is the crankshaft able to rotate 360°?
All
Yes
→ Replace the Starter Motor.
Perform NO START VERIFICATION - VER-1.
No
→ Repair the engine mechanical problem.
Perform NO START VERIFICATION - VER-1.
238
DRIVEABILITY - DIESEL
*ENGINE WILL NOT CRANK —
Continued
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