Circuit Description
The brake pedal position (BPP) sensor 5-volt reference voltage circuit is monitored for an over or under voltage condition.
DTC Descriptor
This diagnostic procedure supports the following DTC:
DTC C0880 Device Voltage Reference Output 2 Circuit
Conditions for Running the DTC
The ignition is ON.
Conditions for Setting the DTC
A malfunction is detected if the supply voltage is above 5.1 volts or below 4.9 volts continuously for more than 100 milliseconds.
Action Taken When the DTC Sets
When DTC C0880 is set the following will occur:
| • | The engine drive control is disabled. |
| • | The panic brake assist is disabled. |
| • | The traction control system is disabled. |
| • | The vehicle stability enhancement system is disabled. |
| • | The service vehicle soon lamp will illuminate. |
Conditions for Clearing the DTC
| • | The current DTC will clear when the fault is no longer present. |
| • | A history DTC clears after 100 consecutive ignition cycles in which no faults have occurred. |
| • | Clear the DTC with a scan tool. |
Diagnostic Aids
Possible causes of this DTC are the following conditions:
| • | A short to ground in the BPP sensor 5-volt reference voltage circuit |
| • | A short to voltage in the BPP sensor 5-volt reference voltage circuit |
| • | A short to ground in the BPP sensor signal circuit |
| • | A short to voltage in the BPP sensor signal circuit |
| • | A malfunctioning BPP sensor |
| • | A internal control module malfunction |
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
Schematic Reference: Exterior Lights Schematics Connector End View Reference: Master Electrical Component List | ||||
1 | Did you perform the Diagnostic System Check - Vehicle? | -- | Go to Step 2 | |
2 |
Is the BPP Sensor A/D Conversi parameter within the specified range? | 0.25-4.9 V | Go to Testing for Intermittent Conditions and Poor Connections | Go to Step 3 |
Is the BPP Sensor A/D Conversi parameter within the specified range? | 4.9-5.1 V | Go to Step 6 | Go to Step 4 | |
4 | Test the 5-volt reference circuit of the BPP sensor for a short to voltage or a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 5 |
5 | Test the BPP sensor signal circuit of the BPP sensor for a short to voltage or a short to ground. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 9 |
6 | Test the BPP sensor signal circuit of the BPP sensor for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 7 |
7 | Test the 5-volt reference circuit of the BPP sensor for a short to voltage. Refer to Circuit Testing and Wiring Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 8 |
8 | Inspect for poor connections at the harness connector of the BPP sensor. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 10 |
9 | Inspect for poor connections at the harness connector of the electronic brake control module (EBCM). Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs . Did you find and correct the condition? | -- | Go to Step 12 | Go to Step 11 |
10 |
Important: Always perform the calibration procedure for the BPP sensor. Refer to Brake Pedal Position Sensor Calibration . Replace the BPP sensor. Refer to Brake Pedal Position Sensor Replacement . Did you complete the replacement? | -- | Go to Step 12 | -- |
11 | Replace the EBCM. Refer to Control Module References for replacement, setup, and programming. Did you complete the replacement? | -- | Go to Step 12 | -- |
12 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
