Circuit Description
The brake fluid level switch is a discrete input to the body control module (BCM). When the brake fluid level becomes low, the level switch closes and grounds the brake fluid level switch input to the BCM (circuit 849).
Conditions for Running the DTC
The ignition switch is on.
Conditions for Setting the DTC
The BCM detects low brake fluid for 2 seconds.
Action Taken When the DTC Sets
The BRAKE indicator illuminates.
Conditions for Clearing the DTC
| • | A current DTC C0267 will clear when the BCM detects the proper brake fluid level for at least 2 seconds. |
| • | All BCM history codes clear after 100 ignition cycles with no current codes active during the 100 ignition cycles. |
Diagnostic Aids
If the DTC is a history DTC, the problem may be intermittent. Try performing the tests while wiggling the wiring and connectors. This can often cause the malfunction to appear.
Test Description
The number(s) below refer to the step number(s) on the diagnostic table.
-
The scan tool displays OFF when the brake fluid level is correct.
-
The scan tool displays ON when the brake fluid level is low.
-
The scan tool should display OFF when the brake fluid level switch is disconnected.
Step | Action | Value(s) | Yes | No |
|---|---|---|---|---|
1 | Did you perform the Hydraulic Brakes Diagnostic System Check? | -- | Go to Step 2 | |
Does the scan tool display OFF? | -- | Go to Step 3 | Go to Step 4 | |
Does the BRAKE FLUID LEVEL SWITCH parameter change state? | -- | Go to Testing for Intermittent Conditions and Poor Connections in Wiring Systems | Go to Step 4 | |
Does the scan tool display OFF? | -- | Go to Step 7 | Go to Step 5 | |
5 | Test the signal circuit of the brake fluid level switch for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 6 |
6 | Inspect for poor connections at the harness connector of the BCM. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 8 |
7 | Inspect for poor connections at the harness connector of the brake fluid level switch. Refer to Testing for Intermittent Conditions and Poor Connections and Connector Repairs in Wiring Systems. Did you find and correct the condition? | -- | Go to Step 10 | Go to Step 9 |
8 | Replace the BCM. Refer to Body Control Module Replacement in Body Control System. Important: Perform the set up procedure for the BCM. Refer to Body Control Module (BCM) Programming/RPO Configuration . Did you complete the replacement? | -- | Go to Step 10 | -- |
9 | Replace the brake fluid level switch. Did you complete the replacement? | -- | Go to Step 10 | -- |
10 |
Does the DTC reset? | -- | Go to Step 2 | System OK |
