Dodge Caliber. Manual — part 809
P0593-SPEED CONTROL SWITCH 2 CIRCUIT HIGH
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 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.
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.
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 below .2 volts
with the jumper wire in place.
Is the (V72) S/C Signal 2 voltage 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
PM
3.
CLOCKSPRING
Turn the ignition off.
Disconnect the Steering Control Module (SCM) C5 connector.
Connect a jumper wire between the (V72) S/C Signal 2 circuit and the (V937) S/C Switch Ground circuit in the
Steering Control Module (SCM) C5 connector, not at the harness connector.
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 below .2 volts with the jumper wire in place.
Is the (V72) S/C Signal 2 voltage below .2 volts with the jumper wire in place?
Yes
>> Replace the Clockspring in accordance with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
>> Go to 4
4.
STEERING CONTROL MODULE (SCM)
Turn the ignition off.
Disconnect the Steering Control Module (SCM) C2 connector.
Connect a jumper wire between the (V72) S/C Signal 2 circuit and the
(V937) S/C Switch Ground circuit in the Steering Control Module (SCM)
C2 harness connector.
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 below .2 volts
with the jumper wire in place.
Is the (V72) S/C Signal 2 voltage below .2 volts with the jumper
wire in place?
Yes
>> Replace the Steering Control Module (SCM) in accordance
with the Service Information.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING).
No
>> Go to 5
5.
(V72) S/C SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Powertrain Control Module (PCM) connector.
Turn the ignition on.
Measure the voltage of the (V72) S/C Signal 2 circuit in the Steering
Control Module (SCM) C2 harness connector.
Is there any voltage present?
Yes
>> Repair the (V72) S/C Signal 2 circuit for a short to voltage.
Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
No
>> Go to 6
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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6.
(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 7
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).
7.
(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 8
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).
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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