DTC B260D or B260E
Diagnostic Instructions
DTC Descriptors
| DTC B260D 02: Left Daytime Running Lamp and
Front Park Lamp Control Circuit Short to Ground |
| DTC B260E 02: Right Daytime Running Lamp and
Front Park Lamp Control Circuit Short to Ground |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
Left Park Lamp Control
|
B260D 02
|
2
|
1
|
-
|
Right Park Lamp Control
|
B260D 02
|
2
|
1
|
-
|
1. The park lamp is always ON
2. The park lamp is always OFF
|
|
| |
Circuit/System Description
The headlamp switch is supplied with ground at all times. When
lighting conditions are correct or the headlamp switch is placed in
either the park or low beam position, ground is applied to the body
control module (BCM) through the park lamp signal circuit. The BCM
responds by applying battery voltage to the left and right park
lamps, side marker lamps and tail lamps. This energizes the
appropriate lamp.
Conditions for Running the DTC
| • |
Headlamp switch in AUTO
position. |
| • |
The ambient light sensor is in
daylight or under full light. |
Conditions for Setting the DTC
The BCM detects a short to ground on the control circuit.
Action Taken When the DTC Sets
The appropriate park lamp is inoperative.
Conditions for Clearing the DTC
The condition for setting the DTC is no longer present.
Reference Information
Schematic Reference
Exterior Lights Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Exterior Lighting Systems Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
Ignition ON, perform the appropriate Front Park Lamp test. The
front park lamp/side marker lamp and tail lamp should be
ON/OFF.
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
appropriate harness connector at the inoperative lamp listed
below: |
| |
• |
E13L Headlamp Assembly -
Left |
| |
• |
E13R Headlamp Assembly -
Right |
| |
• |
E42L Tail Lamp Assembly -
Auxiliary Left |
| |
• |
E42R Tail Lamp Assembly -
Auxiliary Right |
| |
• |
E43L Liftgate Tail Lamp
Assembly - Left |
| |
• |
E43R Liftgate Tail Lamp
Assembly - Right |
| |
• |
E7L License Plate Lamp -
Left |
| |
• |
E7R License Plate Lamp -
Right |
| 2. |
Test for less than 5 Ω
between the ground circuit harness connector terminal listed below
and ground: |
| |
• |
E13L Headlamp Assembly - Left
terminal 1 |
| |
• |
E13R Headlamp Assembly - Right
terminal 1 |
| |
• |
E42L Tail Lamp Assembly -
Auxiliary Left terminal B |
| |
• |
E42R Tail Lamp Assembly -
Auxiliary Right terminal C |
| |
• |
E43L Liftgate Tail Lamp
Assembly - Left terminal 3 |
| |
• |
E43R Liftgate Tail Lamp
Assembly - Right terminal 2 |
| |
• |
E7L License Plate Lamp - Left
terminal 2 |
| |
• |
E7R License Plate Lamp - Right
terminal 2 |
| ⇒ |
If greater than the specified value, test the
ground circuit for an open/high resistance. |
| 3. |
Connect a test lamp between
the control circuit harness connector terminal listed below and
ground: |
| |
• |
E13L Headlamp Assembly - Left
terminal 4 |
| |
• |
E13R Headlamp Assembly - Right
terminal 4 |
| |
• |
E42L Tail Lamp Assembly -
Auxiliary Left terminal A |
| |
• |
E42R Tail Lamp Assembly -
Auxiliary Right terminal D |
| |
• |
E43L Liftgate Tail Lamp
Assembly - Left terminal 2 |
| |
• |
E43R Liftgate Tail Lamp
Assembly - Right terminal 3 |
| |
• |
E7L License Plate Lamp - Left
terminal 1 |
| |
• |
E7R License Plate Lamp - Right
terminal 1 |
| 4. |
Command the Front Park Lamp
test with a scan tool. The test lamp should turn ON and OFF when
changing between the commanded states. |
| ⇒ |
If the test lamp is always ON, test the control
circuit for a short to voltage. If the circuit tests normal,
replace the K9 Body Control Module. |
| ⇒ |
If the test lamp is always OFF, test the control
circuit for a short to ground or an open/high resistance. If the
circuit tests normal, replace the K9 Body Control Module. |
| 5. |
If all circuits test normal,
replace the inoperative lamp. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
