DTC P0572 2.2L
Circuit Description
The torque converter clutch (TCC)/brake switch is a normally closed switch. When the TCC/brake switch is closed, brake pedal released the engine control module (ECM) senses ignition voltage on the TCC/brake switch/cruise control release signal circuit. If the ECM senses a voltage on the TCC/brake switch/cruise control release signal circuit when the TCC/brake switch should be open, this DTC sets.
Conditions for Running the DTC
| • | The vehicle has cycled from 0-60 km/h (0-37 mph) 3 times in 1 ignition cycle. |
| • | Continuous once the previous criteria have been met. |
Conditions for Setting the DTC
The ECM detects voltage on the TCC Brake Switch/Cruise Control Release Signal circuit when the switch should be open.
Action Taken When the DTC Sets
| • | The ECM stores the DTC information into memory when the diagnostic runs and fails. |
| • | The malfunction indicator lamp (MIL) will not illuminate. |
| • | The ECM records the operating conditions at the time the diagnostic fails. The ECM stores this information in the Failure Records. |
Conditions for Clearing the DTC
| • | A last test failed, or current DTC, clears when the diagnostic runs and does not fail. |
| • | A history DTC will clear after 40 consecutive warm-up cycles, if no failures are reported by this or any other non-emission related diagnostic. |
| • | Use a scan tool in order to clear the DTC. |
Diagnostic Aids
Important:
• Verify that the TCC/brake switch is adjusted properly. Refer to adjustment
procedure. • Test drive the vehicle if a switch or circuit condition cannot be located.
An intermittent condition may be duplicated during a test drive. • For an intermittent, refer to
Testing for Intermittent Conditions and Poor Connections
in Wiring Systems.
Test Description
The number below refers to the step number on the diagnostic table.
Step | Action | Yes | No |
|---|---|---|---|
Connector End View Reference: Cruise Control Connector End Views | |||
1 | Did you perform the Diagnostic System Check - Cruise Control? | Go to Step 2 | |
Does the Cruise Brake Switch parameter indicate Applied? | Go to Step 3 | Go to Diagnostic Aids | |
3 |
Does the Cruise Control Brake switch parameter indicate Released? | Go to Step 10 | Go to Step 4 |
4 |
Does the Cruise Control Brake switch parameter indicate Released? | Go to Step 6 | Go to Step 5 |
5 | Inspect the ignition voltage and TCC brake switch/cruise control release signal circuits for an open or short to ground. Refer to Circuit Testing and Wiring Repairs in Wiring Systems. Did you find and correct the problem? | Go to Step 12 | Go to Step 8 |
6 | Inspect the TCC/brake switch for proper adjustment. Refer to Cruise Release Switch Adjustment . Did you find and correct the condition? | Go to Step 12 | Go to Step 7 |
7 | Inspect for poor connections at the harness connector of the TCC/brake 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 12 | Go to Step 9 |
8 | Inspect for poor connections at the harness connector of the engine control module (ECM). 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 12 | Go to Step 11 |
9 | Replace the TCC/brake switch. Refer to Cruise Control Release Switch Replacement . Did you complete the repair? | Go to Step 12 | -- |
10 | Replace the cruise control module. Refer to Cruise Control Module Replacement . Did you complete the repair? | Go to Step 12 | -- |
11 |
Important: The replacement ECM must be programmed. Replace the ECM. Refer to Engine Control Module Replacement in Engine Controls. Is the action complete? | Go to Step 12 | -- |
12 |
Does the DTC reset? | Go to Step 2 | System OK |
