Dodge Ram Truck 1500-2500-3500. Manual — part 1026

*NO CRANK CONDITION (CONTINUED)

6.

(T752) STARTER RELAY CONTROL CIRCUIT OPEN

Turn the ignition off.

Remove the Starter Relay from the IPM.

Disconnect the C3 PCM harness connector.

Measure the resistance in the (T752) Starter Relay Control circuit from
the Relay terminal to the appropriate terminals of special tool #8815.

Is the resistance below 5.0 ohms?

Yes

>> Replace the Starter Motor Relay.

Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)

No

>> Repair the open in the (T752) Starter Relay Control circuit.

Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)

7.

INTERNAL FUSED B+ CIRCUIT OPEN

Turn the ignition off.

Using a 12-volt test light connected to ground, probe the Internal Fused B+ circuit at the Starter Relay terminal.

Does the test light illuminate brightly?

Yes

>> Go To 8

No

>> Repair the excessive resistance in the Internal Fused B+ circuit. Inspect related fuses and repair as

necessary.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

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ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L

DR/DH

*NO CRANK CONDITION (CONTINUED)

8.

(T750) STARTER RELAY OUTPUT CIRCUIT OPEN

Disconnect the Starter Relay Output connector from the Starter Sole-
noid.

Measure the resistance of the (T750) Starter Relay Output circuit
between the Relay and the Solenoid harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Go To 9

No

>> Repair the open in the Starter Relay Output circuit.

Perform the POWERTRAIN VERIFICATION TEST. (Refer
to 9 - ENGINE - STANDARD PROCEDURE)

9.

STARTER

If there are no other possible causes remaining, review repair.

Repair

Replace the Starter.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L

9 - 1027

*NO RESPONSE WITH A NO START CONDITION

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ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L

DR/DH

*NO RESPONSE WITH A NO START CONDITION (CONTINUED)

For the Engine circuit diagram (Refer to 9 - ENGINE - SCHEMATICS AND DIAGRAMS).

For a complete wiring diagram Refer to Section 8W.

Possible Causes

(A919) PCM FUSED B+ CIRCUIT

PCM NO RESPONSE

(F202) (F1) (T751) PCM FUSED IGNITION SWITCH OUTPUT CIRCUITS

(Z130) (Z131) PCM GROUND CIRCUITS

CRANKSHAFT POSITION SENSOR

(F855) 5-VOLT SENSOR OPEN/SHORTED

(F855) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

(F856) 5-VOLT SUPPLY CIRCUIT SHORTED TO GROUND

PCM

Diagnostic Test

1.

(A919) PCM FUSED B+ CIRCUIT

NOTE: The scan tool and cable must be operating properly for
the results of this test to be valid.

NOTE: Make sure the ignition switch was on while trying to com-
municate with the PCM.
Turn the ignition off.

Disconnect the PCM harness connectors.

CAUTION: Do not probe the PCM harness connectors. Probing
the PCM harness connectors will damage the PCM terminals
resulting in poor terminal to pin connection. Install Miller Special
Tool #8815 to perform diagnosis.
Using a 12-volt test light connected to ground probe the appropriate
terminal of special tool #8815.

Does the test light illuminate brightly?

Yes

>> Go To 2

No

>> Repair the open or short to ground in the (A919) Fused

B+ circuit. Inspect and replace fuses as necessary.

Perform the POWERTRAIN VERIFICATION TEST. (Refer to 9 - ENGINE - STANDARD PROCEDURE)

DR/DH

ENGINE - ELECTRICAL DIAGNOSTICS - 3.7L/4.7L/5.7L

9 - 1029