PRE-RELEASE
DTC B369B
| DTC B369B |
| Diagnostic Instructions |
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Perform the
Diagnostic System Check - Vehicle
prior to using this diagnostic procedure.
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Review
Strategy Based Diagnosis
for an overview of the diagnostic approach.
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Diagnostic Procedure Instructions
provides an overview of each diagnostic category.
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| DTC Descriptors |
DTC B369B 02
Sunroof Sunshade Position Select Switch Circuit Short to Ground
DTC B369B 05
Sunroof Sunshade Position Select Switch Circuit High Voltage/Open
DTC B369B 59
Sunroof Sunshade Position Select Switch Circuit Protection Time-Out
| Diagnostic Fault Information |
| Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
| Sunroof Sunshade Position Select Switch Control | B369B 02 | B369B 05 | B369B 05 | - |
| Sunroof Sunshade Position Select Switch Low Reference | - | 1 | 1 | - |
| 1. Power Sunroof/Sunshade Malfunction | ||||
| Circuit/System Description |
The sunshade control switch is connected directly to the controller and provide detent positions for open, express open, off, close, and express 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 |
B369B 02
The sunshade module has detected and reported via the LIN-Bus that the sunroof sunshade position select switch circuit is shorted to ground.B369B 05
The sunshade module has detected and reported via the LIN-Bus that the sunroof sunshade position select switch circuit is open or shorted to voltage.B369B 59
The sunshade module has detected and reported via the LIN-Bus that the sunroof sunshade 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 B369B is stored in the body control module (BCM) memory.
| Conditions for Clearing the DTC |
The BCM no longer detects a malfunction in the sunroof sunshade position select switch signal 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
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Circuit Testing
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Connector Repairs
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Testing for Intermittent Conditions and Poor Connections
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Wiring Repairs
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Scan Tool Reference
Control Module References for scan tool information
| Circuit/System Testing |
| Note | ||
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Because of the accessibility of the sunshade switch, perform the component testing before beginning the Circuit/System Testing. |
| 1. |
Ignition OFF, disconnect the harness connector at the S90 sunroof sunshade switch.
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| 2. |
Scan tool not connected, doors closed, wait 5 minutes and test for less than 10 Ω between the low reference circuit terminal 1 and ground.
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| 3. |
If greater than the specified value, test the low reference circuit for an open/high resistance. If the circuit tests normal, replace the K62 sunroof sunshade module.
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| 4. |
Ignition ON, test for 4.5-5.5 V between the reference voltage circuit terminal 4 and ground.
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| 5. |
If less than specified range, test the reference voltage circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K62 sunroof sunshade module.
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| 6. |
If greater than the specified range, test the reference circuit for a short to voltage. If the circuit tests normal, replace the K62 sunroof sunshade module.
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| 7. |
If all circuits test normal, test or replace the S90 sunroof sunshade switch.
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| Component Testing |
Static Test
| 1. |
Ignition OFF, disconnect the harness connector at the S90 sunroof sunshade switch.
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| 2. |
Test for 3.6-3.7k Ω between the switch terminals 1 and 4.
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| 3. |
If not within the specified range, replace the S90 sunroof sunshade switch.
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| 4. |
Test for 430-440 Ω between the signal terminal 1 and the low reference circuit terminal 4 while pressing the open switch.
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| 5. |
If not within the specified range, replace the S90 sunroof sunshade switch.
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| 6. |
Test for 96-100 Ω between the signal terminal 1 and the low reference circuit terminal 4 while pressing the express open switch.
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| 7. |
If not within the specified range, replace the S90 sunroof sunshade switch.
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Test for 1.7-1.8k Ω between the signal terminal 1 and the low reference circuit terminal 4 while pressing the close switch.
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If not within the specified range, replace the S90 sunroof sunshade switch.
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| 10. |
Test for 930-940 Ω between the signal terminal 1 and the low reference circuit terminal 4 while pressing the express close switch.
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| 11. |
If not within the specified range, replace the S90 sunroof sunshade switch.
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| Repair Instructions |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
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Sunroof Switch Replacement
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Sunroof Sunshade Motor Replacement
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Control Module References
for sunshade motor/actuator replacement, setup and programming
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