Dodge Caliber. Manual — part 972
•
When Monitored:
With the ignition on and no other S/C Switch DTCs present.
•
Set Condition:
The S/C Switch #1 signal indicates that a switch is pressed continuously for 60 seconds.
Possible Causes
INTERMITTENT DTC
(V71) S/C SWITCH 1 SIGNAL CIRCUIT SHORTED TO VOLTAGE
(V937) S/C SWITCH GROUND CIRCUIT SHORTED TO VOLTAGE
(V71) S/C SWITCH 1 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
(V937) S/C SWITCH GROUND CIRCUIT OPEN OR HIGH RESISTANCE
(V71) S/C SWITCH 1 SIGNAL CIRCUIT SHORTED TO GROUND
SPEED CONTROL SWITCH
ENGINE CONTROL MODULE (ECM)
Always perform the Pre-Diagnostic Troubleshooting procedure before proceeding. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
Diagnostic Test
1.
S/C SWITCH VOLTAGES OUT OF RANGE
KEY
SIGNAL 1
SIGNAL 2
LO LIMIT
HI LIMIT
LO LIMIT
HI LIMIT
RELEASED
4.36
4.69
4.36
4.69
ON-OFF
0.50
1.10
3.53
3.90
SET
3.16
3.53
1.56
1.18
RESUME-ACCEL
3.84
4.19
1.70
2.43
CANCEL
1.59
1.97
2.43
3.22
Turn the ignition on.
With the scan tool, monitor the S/C Switch signal voltages.
Press each button while noting the voltage readings for each circuit.
Are the S/C Switch voltages within the ranges specified in the table when each button is pressed?
Yes
>>
Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Go To 2
PM
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1175
2.
(V71) S/C SWITCH 1 SIGNAL CIRCUIT VOLTAGE
Turn the ignition off.
Disconnect the Speed Control Switch harness connector.
Turn the ignition on.
Measure the voltage of the (V71) S/C Switch 1 Signal Circuit at the
Speed Control Switch.
Select the appropriate voltage reading.
4.5 to 5.5 volts
Go To 3
Below 4.5 volts
Go To 6
Above 5.5 volts
Go To 8
3.
(V937) S/C SWITCH GROUND CIRCUIT OPEN CIRCUIT OR HIGH RESISTANCE
Turn the ignition off.
Disconnect the Engine Control Module (ECM) harness connector.
Measure the resistance of the (V937) S/C Switch Ground circuit
between the Speed Control Switch harness connector and the Engine
Control Module (ECM) harness connector.
Is the resistance below 10.0 ohms?
Yes
>> Go To 4
No
>> Repair the (V937) S/C Switch Ground circuit for an open
circuit or high resistance.
Perform the ECM Verification Test Ver.1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
9 - 1176
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
PM
4.
(V937) S/C SWITCH GROUND CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Remove the Main Relay.
Connect a jumper wire between cavity B7 and cavity B9 of the Main
Relay connector.
Turn the ignition on.
Measure the voltage of the (V937) S/C Switch Ground circuit.
Is there any voltage present?
Yes
>> Repair the (V937) S/C Switch Ground circuit for a short to
voltage.
Perform the ECM Verification Test Ver.1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Go to 5
5.
S/C SWITCH
Turn the ignition off.
Connect the Engine Control Module (ECM) harness connector.
Turn the ignition on.
With the scan tool, monitor the S/C Switch Voltage.
While monitoring the scan tool, connect a jumper wire between the
(V71) S/C Switch 1 Signal circuit and the (V937) S/C Switch Ground
circuit in the S/C Switch harness connector.
Does the scan tool display below 0.1 volt with the jumper wire
in place?
Yes
>> Replace the Speed Control Switch in accordance with the
Service Information.
Perform the ECM Verification Test Ver.1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
No
>> Go to 9
PM
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
9 - 1177
6.
(V71) S/C SWITCH 1 SIGNAL CIRCUIT OPEN OR HIGH RESISTANCE
Turn the ignition off.
Disconnect the Engine Control Module (ECM) connector.
Measure the resistance of the (V71) S/C Switch 1 Signal circuit
between the Speed Control Switch harness connector and the Engine
Control Module (ECM) harness connector.
Is the resistance below 10.0 ohms?
Yes
>> Go To 7
No
>> Repair the (V71) S/C Switch 1 Signal circuit for an open cir-
cuit or high resistance.
Perform the ECM Verification Test Ver.1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
7.
(V71) S/C SWITCH 1 SIGNAL CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (V71) S/C Switch 1
Signal circuit.
Is the resistance above 1000 ohms?
Yes
>> Go to 9
No
>> Repair the (V71) S/C Switch 1 Signal circuit for a short to
ground.
Perform the ECM Verification Test Ver.1. (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING)
9 - 1178
ENGINE ELECTRICAL DIAGNOSTICS - DIESEL
PM
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