For 1990-2009 cars

### Circuit Description

The cruise release switch is a normally closed switch. The stop lamp switch signal circuit is a normally open switch. When the brake pedal is released, the powertrain control module (PCM) detects a high voltage signal on the TCC brake switch/cruise control release signal circuit and a low signal voltage signal on the stop lamp switch signal circuit.

### Conditions for Running the DTC

• | The engine is ON.

• | The traction control system or the antilock brake system are not active and have not failed.

• | The vehicle has accelerated from 0 km/h (0 mph) to 60 km/h (37 mph) 3 times in 1 ignition cycle.

• | This diagnostic runs continuously once the conditions for running the DTC has been achieved.

### Conditions for Setting the DTC

When the brake pedal is released, the PCM detects a low voltage signal on the stop lamp switch signal circuit and a low voltage signal on the TCC brake switch/cruise control release signal circuit.

### Action Taken When the DTC Sets

• | The PCM stores the DTC information into memory when the diagnostic runs and fails.

• | The malfunction indicator lamp (MIL) will not illuminate.

• | The PCM records the operating conditions at the time the diagnostic fails. The PCM stores this information in the Failure Records.

• | The cruise control system is disabled.

### 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

In order to avoid a misdiagnosis, Inspect for proper adjustment of the cruise control release switch. Refer to Cruise Release Switch Adjustment .

Step | Action | Yes | No
--- | --- | --- | ---
Schematic Reference: Cruise Control Schematics Connector End View Reference: Antilock Brake System Connector End Views in Antilock Brake System
1 | Did you perform the Cruise Control Diagnostic System Check? | Go to Step 2 | Go to Diagnostic System Check - Cruise Control
2 |

1. Connect a scan tool.
2. Turn the ignition ON, with the engine OFF.
3. With the scan tool, observe the TCC Brake Pedal Switch parameter in the Cruise / powertrain control module (PCM) data list.

Does the TCC Brake Pedal Switch parameter display Released?

Go to Diagnostic Aids

Go to Step 3

3 |

1. Turn the ignition OFF.
2. Disconnect the cruise release switch.
3. Turn the ignition ON, with the engine OFF.
4. Connect a test lamp between the ignition 1 voltage circuit and a good ground.

Does the test lamp illuminate?

Go to Step 4

Go to Step 8

4 |

1. Turn the ignition OFF.
2. Connect a 3 ampere fused jumper between the ignition 1 voltage circuit and the TCC brake switch/cruise control release signal circuit.
3. Turn the ignition ON, with the engine OFF.
4. With the scan tool, observe the TCC Brake Pedal Switch parameter in the Cruise Control Data, data list.

Does the TCC Brake Pedal Switch parameter display Released?

Go to Step 6

Go to Step 5

5 | Test the TCC brake switch/cruise control release signal circuit for an open, for a high resistance, or for a short to ground. Did you find and correct the condition? | Go to Step 11 | Go to Step 7
6 | Inspect for poor connections at the harness connector of the cruise release switch. Did you find and correct the condition? | Go to Step 11 | Go to Step 9
7 | Inspect for poor connections at the harness connector of the PCM. Did you find and correct the condition? | Go to Step 11 | Go to Step 10
8 | Repair the open, the high resistance , or the short to ground in the ignition 1 voltage circuit. Did you complete the repair? | Go to Step 11 | --
9 | Replace the cruise release switch. Refer to Cruise Control Release Switch Replacement . Did you complete the repair? | Go to Step 11 | --
10 | Important: Program the replacement PCM. Replace the PCM. Refer to Powertrain Control Module Replacement in Engine Controls - 1.9L (LSJ). Did you complete the replacement? | Go to Step 11 | --
11 |

1. Use a scan tool in order to clear the DTCs.
2. Operate the vehicle within the Conditions for Running the DTC.

Does the DTC reset?

Go to Step 2

System OK