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| • | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
| • | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
| • | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
|---|---|---|---|---|
F10DL Fuse B+ | C0890 03, B101E 43, B1395 03, B1517 07, U0121 00, U0128 00, U0422 71 | C0890 03, B101E 43, B1395 03, B1517 07, U0121 00, U0128 00, U0422 71 | -- | -- |
Brake Pedal Position Sensor 5V Reference | C0277 06, C0890 03, U0422 71, C0561 71 | C0277 06, U0422 71, C0561 71 | C0277 07, C0890 07, U0422 71, C0561 71 | - |
Brake Pedal Position Sensor Signal | C0277 06, U0422 71, C0561 71 | C0277 06, U0422 71, C0561 71 | C0277 07, C0890 07, U0422 71, C0561 71 | C0277 09 |
Centre High Mounted Brake Lamp Control | 2 | 2 | 2 | -- |
Brake/Indicator Lamp Control - Left | 1 | 1 | 1 | -- |
Brake/Indicator Lamp Control - Right | 1 | 1 | 1 | -- |
Brake Pedal Position Sensor Low Reference | - | C0277 06, U0422 71, C0561 71 | 1 | -- |
Centre High Mounted Brake Lamp Ground | -- | 2 | -- | -- |
Tail/Brake Lamp Ground - Left | -- | 1 | -- | -- |
Tail/Brake Lamp Ground - Right | -- | 1 | -- | -- |
1. Brake Lamps Malfunction 2. Centre High Mounted Brake Lamp Malfunction | ||||
The brake pedal position (BPP) sensor is used to sense the action of the driver application of the brake pedal. The BPP sensor provides an analogue voltage signal that will increase as the brake pedal is applied. The body control module (BCM) provides a low reference signal and a 5 V reference voltage to the BPP sensor. When the variable signal reaches a voltage threshold indicating the brakes have been applied, the BCM will apply battery voltage to the left and right brake lamp control circuits as well as the centre high mounted brake lamp control circuit illuminating the left and right brake lamps and the centre high mounted brake lamp.
| • | Battery voltage must be between 9-16 V. |
| • | Brakes applied. |
| • | The BCM detects a short to ground or an open/high resistance in the BPP sensor 5 V reference circuit. |
| • | The BCM detects a short to ground or an open/high resistance in the BPP sensor signal circuit. |
| • | The BCM detects an open/high resistance in the BPP sensor low reference circuit. |
| • | The BCM detects a short to voltage in the BPP sensor 5 V reference circuit. |
| • | The BCM detects a short to voltage in the BPP sensor signal circuit. |
The BCM detects the BPP sensor signal is changing faster than possible under normal operating conditions.
The DTC will set when the BPP sensor home position is not learned.
| • | The BCM detects a short to ground in the BPP sensor 5 V reference circuit. |
| • | The BCM detects a short to ground or an open/high resistance in the F10DL fuse B+ circuit. |
| • | The BCM detects a short to voltage in the BPP sensor 5 V reference circuit. |
| • | The BCM detects a short to voltage in the BPP sensor low reference circuit. |
| • | The vehicle will not start with a short to ground or an open/high resistance on the BPP sensor 5 V reference circuit or the BPP sensor signal circuit. |
| • | The vehicle will start with an open/high resistance on the BPP sensor low reference circuit without applying the brake pedal. |
The vehicle will not start with a short to voltage on the BPP sensor 5 V reference circuit or the BPP sensor signal circuit.
| • | The condition responsible for setting the DTC no longer exists. |
| • | For DTC C0277 4B a successful brake pedal position sensor calibration has been performed. |
| • | A history DTC will clear once 50 consecutive malfunction free vehicle ON/OFF switch cycles have occurred. |
| • | A DTC will not clear the current status until the next ignition cycle. |
Exterior Lighting Systems Description and Operation
Control Module References for scan tool information
| ⇒ | If the test lamp does not illuminate, test the low reference circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module. |
| ⇒ | If less than the specified range, test the 5 V reference circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module. |
| ⇒ | If greater than the specified range, test the 5 V reference circuit for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module. |
| ⇒ | If not the specified value, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the K9 Body Control Module. |
| ⇒ | If not the specified value, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K9 Body Control Module. |
| ⇒ | If DTC C0277 4B resets as current, replace the B22 Brake Pedal Position Sensor. |
| ⇒ | If DTC C0277 09 resets as current, replace the K9 Body Control Module. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
| • | Control Module References for BCM replacement, programming and setup |
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