Dodge Caliber. Manual — part 797
3.
(K20) GEN FIELD CONTROL CIRCUIT SHORTED TO VOLTAGE
Turn the ignition off.
Disconnect the Powertrain Control Module (PCM) harness connector.
Turn the ignition on.
Measure the voltage on the (K20) Gen Field Control circuit in the Generator harness connector.
Is there any voltage present?
Yes
>> Repair the (K20) Gen Field Control for a short to voltage.
Perform the PCM Verification Test Ver. 1 (Refer to 9 - ENGINE - DIAGNOSIS AND TESTING)
No
>> Go To 4
4.
POWERTRAIN CONTROL MODULE (PCM)
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Generator 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 and program 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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P0571-BRAKE SWITCH 1 PERFORMANCE
For a complete wiring diagram Refer to Section 8W
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
PM
•
When Monitored:
With the ignition on and battery voltage greater than 10.4 volts.
•
Set Condition:
The PCM detects that the states of Brake Signal 1 and Brake Signal 2 do not match for more than 50 ms.
Possible Causes
INTERMITTENT DTC
(B15) BRAKE SIGNAL 1 CIRCUIT SHORTED TO GROUND
(B16) BRAKE SIGNAL 2 CIRCUIT SHORTED TO VOLTAGE
(F202) FUSED IGNITION SWITCH OUTPUT (RUN-START) CIRCUIT OPEN OR HIGH RESISTANCE
(Z967) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
(B15) BRAKE SIGNAL 1 CIRCUIT OPEN OR HIGH RESISTANCE
(B16) BRAKE SIGNAL 2 CIRCUIT OPEN OR HIGH RESISTANCE
STOP LAMP SWITCH
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 the scan tool, monitor the states of Brake Signal 1 and Brake Signal 2 while pressing and releasing the brake
pedal several times.
Do the states change from Pressed when the pedal is pressed to Not Pressed when the pedal is
released?
Yes
>> Refer to the *CHECKING FOR AN INTERMITTENT DTC Diagnostic Procedure. (Refer to 9 - ENGINE -
DIAGNOSIS AND TESTING)
No
>> Go to 2
2.
(B15) BRAKE SIGNAL 1 CIRCUIT
Turn the ignition off.
Disconnect the Powertrain Control Module (PCM) connector.
Using a 12 volt test light connected to 12 volts, check the (B15) Brake
Signal 1 circuit in the Powertrain Control Module (PCM) harness con-
nector while pressing and releasing the brake pedal several times.
Does the test light change from illuminated when the pedal is
pressed to not illuminated when the pedal is released?
Yes
>> Go to 3.
No
>> Go to 4
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ENGINE ELECTRICAL DIAGNOSTICS - GPEC
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3.
(B16) BRAKE SIGNAL 2 CIRCUIT
Turn the ignition on.
Using a 12 volt test light connected to ground, check the (B16) Brake
Signal 2 circuit in the Powertrain Control Module (PCM) harness con-
nector while pressing and releasing the brake pedal several times.
Does the test light change from illuminated when the pedal is
pressed to not illuminated when the pedal is released?
Yes
>> Go to 11
No
>> Go to 7
4.
(Z967) GROUND CIRCUIT OPEN OR HIGH RESISTANCE
Turn the ignition off.
Disconnect the Stop Lamp Switch connector.
Using a 12 volt test light connected to 12 volts, check the (Z967)
Ground circuit in the Stop Lamp Switch harness connector.
NOTE: The test light should be illuminated and bright. Compare
the brightness to that of a direct connection to the battery.
Is the test light illuminated and bright?
Yes
>> Go to 5
No
>> Repair the (Z967) Ground circuit for an open circuit or high
resistance.
Perform the PCM Verification Test Ver. 1 (Refer to 9 -
ENGINE - DIAGNOSIS AND TESTING).
5.
(B15) BRAKE SIGNAL 1 CIRCUIT SHORTED TO GROUND
Measure the resistance between ground and the (B15) Brake Signal 1
circuit in the Stop Lamp Switch harness connector.
Is the resistance above 100 ohms?
Yes
>> Go to 6
No
>> Repair the (B15) Brake Signal 1 circuit for a short to
ground.
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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