Refer to Wiring Diagrams Cell 90 for schematic and connector information.
Normal Operation and Fault Conditions
REFER to: Exterior Lighting - Overview (417-01 Exterior Lighting, Description and Operation).
REFER to: Exterior Lighting - System Operation and Component Description (417-01 Exterior Lighting, Description and Operation).
DTC Fault Trigger Conditions
| DTC |
Description |
Fault Trigger Condition |
| BCM B1115:11 |
High Mounted Stop Lamp control: Circuit Short To Ground |
A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the high mounted stoplamp voltage supply circuit.
|
| BCM B1115:15 |
High Mounted Stop Lamp control: Circuit Short To Battery Or Open |
A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the high mounted stoplamp voltage supply circuit.
|
| BCM B1444:11 |
Left Rear Stop/Position Lamp Output: Circuit Short To Ground |
A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH rear stoplamp voltage supply circuit.
|
| BCM B1444:15 |
Left Rear Stop/Position Lamp Output: Circuit Short To Battery Or Open |
A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear stoplamp voltage supply circuit.
|
| BCM B1448:11 |
Right Rear Stop/Position Lamp Output: Circuit Short To Ground |
A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the right RH stoplamp voltage supply circuit.
|
| BCM B1448:15 |
Right Rear Stop/Position Lamp Output: Circuit Short To Battery Or Open |
A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the right RH stoplamp voltage supply circuit.
|
| BCM B14A0:11 |
Left Tailgate/Liftgate Lamps: Circuit Short To Ground |
A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the LH rear stoplamp voltage supply circuit.
|
| BCM B14A0:15 |
Left Tailgate/Liftgate Lamps: Circuit Short To Battery Or Open |
A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the LH rear stoplamp voltage supply circuit.
|
| BCM B14A1:11 |
Right Tailgate/Liftgate Lamps: Circuit Short To Ground |
A continuous memory and on-demand DTC that sets when the BCM detects a short to ground from the right RH stoplamp voltage supply circuit.
|
| BCM B14A1:15 |
Right Tailgate/Liftgate Lamps: Circuit Short To Battery Or Open |
A continuous memory and on-demand DTC that sets when the BCM detects an open or short to voltage from the right RH stoplamp voltage supply circuit.
|
Possible Sources
- Wiring, terminals or connectors
- Rear lamp assembly
- High mounted stoplamp
-
BCM
|
| B1 CHECK THE STOPLAMPS OPERATION |
-
Apply the brake pedal and observe the rear and high mounted stoplamps.
-
Release the brake pedal and observe the rear and high mounted stoplamps.
Is any stoplamp always on?
| No |
For the high mounted stoplamp, GO to B3
For a rear lamp stoplamp, GO to B8
|
|
| B2 CHECK THE BCM (BODY CONTROL MODULE)
STOPLAMP OUTPUT CIRCUITS FOR A SHORT TO VOLTAGE |
Does the stoplamp in question continue to illuminate?
| Yes |
REPAIR the affected circuit.
|
|
| B3 CHECK FOR VOLTAGE TO THE HIGH MOUNTED STOPLAMP |
-
Disconnect: High Mounted Stoplamp C475.
-
While applying the brake pedal, measure:
Click to display connectors
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C475-1
|
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|
Ground
|
Is the voltage greater than 11 volts?
|
| B4 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE HIGH MOUNTED STOPLAMP |
-
Using a diagnostic scan tool, perform the BCM self-test.
-
Clear the Diagnostic Trouble Codes (DTCs) and repeat
the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
-
While applying the brake pedal, measure:
Click to display connectors
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C475-1
|
|
Ground
|
Is the voltage greater than 11 volts?
| Yes |
INSTALL a new high mounted stoplamp.
REFER to: High Mounted Stoplamp (417-01 Exterior Lighting, Removal and Installation).
|
|
| B5 CHECK THE HIGH MOUNTED STOPLAMP GROUND CIRCUIT FOR AN OPEN |
-
While applying the brake pedal, measure:
Click to display connectors
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C475-1
|
|
C475-2
|
Is the voltage greater than 11 volts?
| Yes |
INSTALL a new high mounted stoplamp.
REFER to: High Mounted Stoplamp (417-01 Exterior Lighting, Removal and Installation).
|
|
| B6 CHECK THE HIGH MOUNTED STOPLAMP SUPPLY CIRCUIT FOR A SHORT TO GROUND |
-
Measure:
Click to display connectors
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C475-1
|
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|
Ground
|
Is the resistance greater than 10,000 ohms?
| No |
REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC
U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and
REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
|
|
| B7 CHECK THE HIGH MOUNTED STOPLAMP SUPPLY CIRCUIT FOR AN OPEN |
-
Measure:
Click to display connectors
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C475-1
|
|
C2280E-13
|
Is the resistance less than 3 ohms?
|
| B8 CHECK FOR VOLTAGE TO THE REAR LAMP ASSEMBLY |
-
Disconnect: Inoperative LH Rear Lamp C414 or RH Rear Lamp C417.
-
While applying the brake pedal, measure:
Click to display connectors
LH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C414-3
|
|
Ground
|
Click to display connectors
RH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C417-3
|
|
Ground
|
Is the voltage greater than 11 volts?
|
| B9 REPEAT THE ON-DEMAND SELF-TEST AND CHECK FOR VOLTAGE TO THE REAR LAMP ASSEMBLY |
-
Using a diagnostic scan tool, perform the BCM self-test.
-
Clear the Diagnostic Trouble Codes (DTCs) and repeat
the self-test (required to enable the lamp output driver).
-
While applying the brake pedal, measure:
Click to display connectors
LH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C414-3
|
|
Ground
|
Click to display connectors
RH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C417-3
|
|
Ground
|
Is the voltage greater than 11 volts?
| Yes |
INSTALL a new rear lamp assembly.
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation).
|
|
| B10 CHECK THE REAR STOPLAMP GROUND CIRCUIT FOR AN OPEN |
-
While applying the brake pedal, measure:
Click to display connectors
LH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C414-3
|
|
C414-1
|
Click to display connectors
RH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C417-3
|
|
C417-1
|
Is the voltage greater than 11 volts?
| Yes |
INSTALL a new rear lamp assembly.
REFER to: Rear Lamp Assembly (417-01 Exterior Lighting, Removal and Installation).
|
|
| B11 CHECK THE REAR STOPLAMP SUPPLY CIRCUIT FOR A SHORT TO GROUND |
-
Measure:
Click to display connectors
LH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C414-3
|
|
Ground
|
Click to display connectors
RH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C417-3
|
|
Ground
|
Is the resistance greater than 10,000 ohms?
| No |
REPAIR the circuit. After the repair:
If no Diagnostic Trouble Codes (DTCs) are present, TEST the system for normal operation.
If DTC
U1000:00 is present, CLEAR the Diagnostic Trouble Codes (DTCs) and
REPEAT the self-test (required to enable the lamp output driver if DTC U1000:00 is present).
If DTC U3000:49 is present, INSTALL a new BCM.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
|
|
| B12 CHECK THE REAR STOPLAMP SUPPLY CIRCUITS FOR AN OPEN |
-
Measure:
Click to display connectors
LH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C414-3
|
|
C2280E-24
|
Click to display connectors
RH Stop Lamp
|
Positive Lead
|
Measurement / Action
|
Negative Lead
|
|
C417-3
|
|
C2280E-23
|
Is the resistance less than 3 ohms?
| No |
REPAIR the circuit in question.
|
|
| B13 CHECK FOR CORRECT BCM (BODY CONTROL MODULE)
OPERATION |
-
Disconnect and inspect all BCM connectors.
-
Repair:
-
corrosion (install new connector or terminals – clean module pins)
-
damaged or bent pins – install new terminals/pins
-
pushed-out pins – install new pins as necessary
-
Reconnect the BCM connectors. Make sure they seat and latch correctly.
-
Operate the system and determine if the concern is still present.
Is the concern still present?
| Yes |
CHECK OASIS for any applicable service articles: TSB, GSB, SSM or FSA.
If a service article exists for this concern, DISCONTINUE this test and
FOLLOW the service article instructions. If no service articles address
this concern, INSTALL a new BCM.
REFER to: Body Control Module (BCM) (419-10 Multifunction Electronic Modules, Removal and Installation).
|
| No |
The system is operating correctly at this time. The
concern may have been caused by module connections. ADDRESS the root
cause of any connector or pin issues.
|
|
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PINPOINT TEST A : ALL THE STOPLAMPS ARE INOPERATIVE OR ALWAYS ON.jpg){kind=icon}
PINPOINT TEST A : ALL THE STOPLAMPS ARE INOPERATIVE OR ALWAYS ON.jpg)
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