Dodge Caliber. Manual — part 806
11.
(V71) S/C SIGNAL 1 CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (V71) S/C Signal 1 circuit between the
Steering Control Module (SCM) C2 harness connector and the Power-
train Control Module (PCM) harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Go to 12
No
>> Repair the (V71) S/C Signal 1 circuit for an open circuit or
high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
12.
(V72) S/C SIGNAL 2 CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (V72) S/C Signal 2 circuit between the
Steering Control Module (SCM) C2 harness connector and the Power-
train Control Module (PCM) harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Go to 13
No
>> Repair the (V72) S/C Signal 2 circuit for an open circuit or
high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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13.
(V937) S/C SWITCH GROUND CIRCUIT OPEN OR HIGH RESISTANCE
Measure the resistance of the (V937) S/C Switch Ground circuit
between the Steering Control Module (SCM) C2 harness connector and
the Powertrain Control Module (PCM) harness connector.
Is the resistance below 5.0 ohms?
Yes
>> Go to 14
No
>> Repair the (V937) S/C Switch Ground circuit for an open
circuit or high resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
14.
POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Speed Control
Switch and the Powertrain Control Module (PCM).
Look for any chafed, pierced, pinched, or partially broken wires.
Look for broken, bent, pushed out or corroded terminals.
Refer to any Technical Service Bulletins that may apply.
Were any problems found?
Yes
>> Repair as necessary.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
>> Replace the Powertrain Control Module (PCM) in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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P0591-SPEED CONTROL SWITCH 2 PERFORMANCE
For a complete wiring diagram Refer to Section 8W
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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•
When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
•
Set Condition:
The ECM detects that the Speed Control signal voltage is implausible.
Possible Causes
INTERMITTENT DTC
(V72) S/C SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE
(V72) S/C SIGNAL 2 CIRCUIT SHORTED TO GROUND
(V72) S/C SIGNAL 2 CIRCUIT SHORTED TO THE (V937) S/C SWITCH GROUND CIRCUIT
(V72) S/C SIGNAL 2 CIRCUIT OPEN OR HIGH RESISTANCE
(V937) S/C SWITCH GROUND CIRCUIT OPEN OR HIGH RESISTANCE
CLOCKSPRING
SPEED CONTROL SWITCH
STEERING CONTROL MODULE (SCM)
POWERTRAIN CONTROL MODULE (PCM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
DTC IS ACTIVE
Turn the ignition on.
With a scan tool, select View DTCs.
Is the status Active for this DTC?
Yes
>> Go to 2
No
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
2.
SPEED CONTROL SWITCH
Turn the ignition off.
Remove the Speed Control Switch in accordance with the Service Infor-
mation.
Turn the ignition on.
With a scan tool, read the (V72) S/C Signal 2 voltage.
NOTE: The (V72) S/C Signal 2 voltage should be above 4.8 volts
with the Speed Control Switch removed.
Connect a jumper wire between the (V72) S/C Signal 2 circuit and the
(V937) S/C Switch Ground circuit in the Speed Control Switch harness
connector.
With a scan tool, read the (V72) S/C Signal 2 voltage.
NOTE: The (V72) S/C Signal 2 voltage should be below .2 volts
with the jumper wire in place.
Is the (V72) S/C Signal 2 voltage above 4.8 volts with the Speed Control Switch removed and below .2
volts with the jumper wire in place?
Yes
>> Replace the Speed Control Switch in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
>> Go to 3
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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