Dodge Ram Truck 1500-2500-3500. Manual — part 931

P0585-SPEED CONTROL SWITCH 1/2 CORRELATION (5.7L) (CONTINUED)

7.

S/C SWITCH SIGNAL CIRCUIT OPEN

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.
Measure the resistance of the (V37) and (V38) S/C Switch Signal cir-
cuits from both Speed Control harness connectors to the appropriate
terminals of special tool #8815.

Is the resistance below 5.0 ohms for each measurement?

Yes

>> Go To 8

No

>> Repair the excessive resistance in the (V37) or (V38) S/C

Switch Signal circuit.

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

9 - 646

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

DR/DH

P0585-SPEED CONTROL SWITCH 1/2 CORRELATION (5.7L) (CONTINUED)

8.

(V937) SWITCH RETURN CIRCUIT OPEN

NOTE: The measurement must be taken from both Speed Control
Switch harness connectors.
Measure the resistance of the (V937) Switch Return circuit from both
Speed Control harness connector to the appropriate terminal of special
tool #8815.

Is the resistance below 5.0 ohms for both measurements?

Yes

>> Go To 9

No

>> Repair the excessive resistance in the (V937) Switch

Return circuit.

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

DR/DH

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

9 - 647

P0585-SPEED CONTROL SWITCH 1/2 CORRELATION (5.7L) (CONTINUED)

9.

S/C SWITCH SIGNAL CIRCUITS SHORTED TO THE (V937) SWITCH RETURN CIRCUIT

Measure the resistance between the (V937) Switch Return circuit and
both of the (V37) and (V38) S/C Switch Signal circuits in the Speed
Control harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Repair the short between the (V937) Switch Return circuit

and the (V37) or (V38) S/C Switch Signal circuit.

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

No

>> Go To 10

9 - 648

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

DR/DH

P0585-SPEED CONTROL SWITCH 1/2 CORRELATION (5.7L) (CONTINUED)

10.

(V37) S/C SWITCH NO.1 SIGNAL CIRCUIT SHORTED TO THE (V38) S/C SWITCH NO.2 SIGNAL
CIRCUIT

Measure the resistance between the (V37) S/C Switch No.1 Signal cir-
cuit and the (V38) S/C Switch No.2 Signal circuit at both Speed Con-
trol harness connectors.

Is the resistance below 100 ohms for each circuit?

Yes

>> Repair the short between the (V38) S/C Switch No.2 Sig-

nal circuit and the (V37) S/C Switch No.1 Signal circuit.

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

No

>> Go To 11

DR/DH

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

9 - 649