DTC B369C
Diagnostic Instructions
DTC Descriptors
DTC B369C 02: Sunroof Tilt Position Select
Switch Circuit Short to Ground |
DTC B369C 05: Sunroof Tilt Position Select
Switch Circuit High Voltage/Open |
DTC B369C 59: Sunroof Tilt Position Select
Switch Circuit Protection Time-Out |
Diagnostic Fault Information
Circuit
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Short to Ground
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Open/High Resistance
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Short to Voltage
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Signal Performance
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Sunroof Ventilation Position Select Switch Control
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B369C 02
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B369C 05
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B369C 05
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-
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Sunroof Ventilation Position Select Switch Low Reference
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-
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1
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1
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-
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1. Power Sunroof/Sunshade Malfunction
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|
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Circuit/System Description
The sunroof ventilation position select switch is connected
directly to the controller and provide detent positions for open,
off and close. The control switch completes the circuit between two
signals provided by the control module, a reference ground Input
and a pull-up voltage provided by the analog to digital switch
input. The control switch places a different resistor ladder
network in the circuit depending on the function selected. The
controllers analog to digital switch input reads the resulting
voltage range and determines the function.
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
B369C 02
The sunroof module has detected and reported via the LIN-Bus that
the sunroof ventilation position select switch circuit is shorted
to ground.
B369C 05
The sunroof module has detected and reported via the LIN-Bus that
the sunroof ventilation position select switch circuit is open or
shorted to voltage.
B369C 59
The sunroof module has detected and reported via the LIN-Bus that
the sunroof ventilation position select switch has been the same
active position for 20 s after the glass has stopped moving in the
requested direction due to reaching the end of the allowable
motion.
Action Taken When the DTC Sets
DTC B369C is stored in the body control module (BCM) memory.
Conditions for Clearing the DTC
The BCM no longer detects a malfunction in the sunroof
ventilation position select switch circuit.
Reference Information
Schematic Reference
Sunroof Schematics
Connector End View Reference
Component Connector End Views
Description and Operation
Sunroof Description and Operation
Electrical Information Reference
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Testing
1. |
Ignition OFF, disconnect the
harness connector at the S88 Sunroof Tilt Switch. |
2. |
Test for less than 5 Ω
between the ground circuit terminal 1 and ground. |
⇒ |
If greater than the specified value, test the
ground circuit for an open/high resistance. |
3. |
Ignition ON, verify the scan
tool sunroof tilt switch is short to battery. |
⇒ |
If not the specified value, test the signal
circuit terminal 4 for a short to ground. If the circuit tests
normal, replace the K61 Sunroof Control Module. |
4. |
Install a 5 A fused jumper
wire between the signal circuit terminal 4 and the ground circuit
terminal 1. Verify the scan tool sunroof tilt switch is short to
ground. |
⇒ |
If not the specified value, test the signal
circuit for a short to voltage or an open/high resistance. If the
circuit tests normal, replace the K61 Sunroof Control Module. |
5. |
If all circuits test normal,
test or replace the S88 Sunroof Tilt Switch. |
Component Testing
Static Test
1. |
Ignition OFF, disconnect the
harness connector at the S88 Sunroof Tilt Switch. |
2. |
Test for 930-940 kΩ
between the switch terminals 1 and 4. |
⇒ |
If not within the specified range, replace the S88
Sunroof Tilt Switch. |
3. |
Test for 96-100 Ω
between the signal terminal 1 and the low reference circuit
terminal 4 while pressing the open switch. |
⇒ |
If not within the specified range, replace the S88
Sunroof Tilt Switch. |
4. |
Test for 430-440 Ω
between the signal terminal 1 and the low reference circuit
terminal 4 while pressing the close switch. |
⇒ |
If not within the specified range, replace the S88
Sunroof Tilt Switch. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
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