Cruise Control System: Diagnosis Chevrolet Sonic I

Diagnostic Code Index

DIAGNOSTIC CODE INDEX

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(ref-542476-S03610919532013041600000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-542476-S11988299792013041600000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-542476-S27446858652013041600000) provides an overview of each diagnostic category.

Conditions for Running the DTC

1. The engine speed is greater than 700 RPM.
2. The traction control system or the antilock brake system are not active and have not failed.
3. The vehicle speed is greater than 48 km/h (30 mph).
4. The diagnostic will disable when the wheel speed is less than 16 km/h (10 mph).

Conditions for Setting the DTC

The BCM detects either a low voltage signal on the stop lamp switch signal circuit when the serial data message from the ECM indicates the brakes are applied, or a high voltage signal on the stop lamp switch signal circuit when the serial data message from the ECM indicates the brakes are not applied.

Actions Taken When the DTC Sets

1. The cruise control system is disabled.
2. The malfunction indicator lamp (MIL) will not illuminate.

Conditions for Clearing the DTC

1. The condition responsible for setting the DTC no longer exists.
2. A history DTC will clear after 40 malfunction-free ignition cycles have occurred.

1. Perform the «Diagnostic System Check - Vehicle»(ref-542476-S03610919532013041600000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-542476-S11988299792013041600000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-542476-S27446858652013041600000) provides an overview of each diagnostic category.

Diagnostic Fault Information

1. The engine is running.
2. Battery voltage is greater than 11.5 V.
3. Brakes applied.

P0572

This DTC will set when the ECM detects a short to ground or an open on the discrete brake signal circuit when the serial data message from the BCM indicates the brakes are applied. This diagnostic will run when the serial data message and the voltage signal on the brake switch signal circuit do not match for 8 out 10 times, and the condition is present for greater than 2 seconds.

P0573

This DTC will set when the ECM detects a short to voltage on the discrete brake signal circuit when the serial data message from the BCM indicates the brakes are NOT applied. This diagnostic will run when the serial data message and the voltage signal on the brake switch signal circuit do not match for 8 out 10 times, and the condition is present for greater than 2 seconds.

1. The malfunction indicator lamp (MIL) will not illuminate.
2. The cruise control system is disabled.

1. The condition responsible for setting the DTC no longer exists.
2. A history DTC will clear after 40 malfunction-free ignition cycles have occurred.

Circuit/System Testing

1. Ignition OFF, disconnect the X1 harness connector at the K20 Engine Control Module, ignition ON.
2. Connect a test lamp between the signal circuit terminal 57 and ground.
3. Verify the test lamp turns ON and OFF when pressing and releasing the brake pedal. If the test lamp is always OFF Ignition OFF, disconnect the harness connector at the K9 Body Control Module. Test for infinite resistance between the signal circuit and ground. If not infinite resistance, repair the short to ground on the circuit. If infinite resistance. Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K9 Body Control Module. If the test lamp is always ON Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON. Test for less than 1 V between the signal circuit and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V replace the K9 Body Control Module. If the test lamp turns ON and OFF
4. Replace the K20 Engine Control Module.

1. Perform the «Diagnostic System Check - Vehicle»(ref-542476-S03610919532013041600000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-542476-S11988299792013041600000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-542476-S27446858652013041600000) provides an overview of each diagnostic category.

1. The ignition is ON.
2. The vehicle speed is greater than 40 km/h (25 MPH) and the cruise control is engaged.

1. The ECM receives an invalid cruise control switch status serial data message from the BCM.
2. This diagnostic runs continuously.

DTC P0575 is a type C DTC.

DTC P0575 is a type C DTC.

1. Perform the «Diagnostic System Check - Vehicle»(ref-542476-S03610919532013041600000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-542476-S11988299792013041600000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-542476-S27446858652013041600000) provides an overview of each diagnostic category.

The engine is ON.

1. The ECM receives an invalid brake pedal status serial data message from the BCM.
2. This diagnostic runs continuously.

1. The malfunction indicator lamp (MIL) will not illuminate.
2. The cruise control system is disabled.

1. The condition responsible for setting the DTC no longer exists.
2. A history DTC will clear after 40 malfunction-free ignition cycles have occurred.

Visual/Physical Inspection

1. Inspect for aftermarket devices which can affect the operation of the Cruise Control System. Refer to «Checking Aftermarket Accessories»(ref-542498-S16706522532013041600000) .
2. Inspect the accessible system components or the visible system components for obvious damage or for obvious conditions which can cause the symptom.

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

1. «Cruise Control Malfunction - DTC B3794, P0564, P0565, P0567, P0568, P056C, P0580, P0581, P155A-P155C, or P162C»(ref-542517-S08256460112013041600000)
2. «Cruise Control Indicator Malfunction»(ref-542517-S26056314092013041600000)

1. Perform the «Diagnostic System Check - Vehicle»(ref-542476-S03610919532013041600000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-542476-S11988299792013041600000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-542476-S27446858652013041600000) provides an overview of each diagnostic category.

1. Perform the «Diagnostic System Check - Vehicle»(ref-542476-S03610919532013041600000) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(ref-542476-S11988299792013041600000) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(ref-542476-S27446858652013041600000) provides an overview of each diagnostic category.

1. The cruise switch is ON.
2. The ignition is ON.

B3794 08

The BCM detects an invalid voltage signal on the cruise control switch signal circuit for 1 second.

B3794 61

Stuck switch for either Resume/Accel or Set/Coast button for 60 seconds.

P0564, P0565, P0567, P0568, P056C

1. The BCM detects an invalid voltage signal on the cruise control switch signal circuit for greater than 2 seconds and sends a serial data message to the ECM. The ECM sets these DTCs when the message is received.
2. The ECM runs this diagnostic continuously.

P0580, P0581

1. The ECM detects an invalid voltage signal on the cruise control switch signal circuit.
2. The above condition is present for greater than 2 seconds.
3. The ECM runs this diagnostic continuously.

P155A

The ECM is unable to determine the state of the cruise control switch.

P162C

The ECM is unable to determine the state of the vehicle speed limiting switch.

B3794

1. The malfunction indicator lamp (MIL) will not illuminate.
2. The cruise control system is disabled.

P0564, P0565, P0567, P0568, P056C, P0580, P0581, P155A, P162C

DTCs P0564, P0565, P0567, P0568, P056C, P0580, P0581, P155A and P162C are type C DTCs

B3794

1. The condition responsible for setting the DTC no longer exists.
2. A history DTC will clear after 40 malfunction-free ignition cycles have occurred.

P0564, P0565, P0567, P0568, P056C, P0580, P0581, P155A, P162C

DTCs P0564, P0565, P0567, P0568, P056C, P0580, P0581, P155A and P162C are type C DTCs.

Note. An open ignition circuit or fuse before the control module will cause communication DTCs or power mode mismatch DTCs to set against or in the control module. This failure mode will be diagnosed in the no communications diagnostic procedure or power mode mismatch. This test assumes the ignition circuit has a driver that will open under a high current condition before the fuse opens. The driver can open under normal conditions such as battery run down protection or a retained accessory power mode.

1. Ignition OFF, disconnect the harness connector at the S70L Steering Wheel Controls Switch-Left, ignition ON.
2. Verify a test lamp illuminates between the ignition circuit terminal 1 and ground. If the test lamp does not illuminate Ignition OFF, disconnect the harness connector at the K9 Body Control Module. Test for greater than 100 ohms between the ignition circuit and ground. If 100 ohms or less, repair the short to ground on the circuit. If greater than 100 ohms Test for less than 2 ohms in the ignition circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, test or replace the K9 Body Control Module. If the test lamp illuminates
3. Verify the scan tool ECM Cruise Control Switch Status parameter is Off. If not Off Ignition OFF, disconnect the harness connector at the K9 Body Control Module, ignition ON. Test for less than 1 V between the signal circuit terminal 3 and ground. If 1 V or greater, repair the short to voltage on the circuit. If less than 1 V, replace the K9 Body Control Module. If Off
4. Install a 3 A fused jumper wire between the signal circuit terminal 3 and the ignition circuit terminal 1.
5. Verify the scan tool ECM Cruise Control parameter is Disabled. If not Error Ignition OFF, disconnect the harness connector at the K9 Body Control Module. Test for infinite resistance between the signal circuit terminal 9 and ground. If less than infinite resistance, repair the short to ground on the circuit. If infinite resistance Test for less than 2 ohms in the signal circuit end to end. If 2 ohms or greater, repair the open/high resistance in the circuit. If less than 2 ohms, replace the K9 Body Control Module. If Error
6. Test or replace the S70L Steering Wheel Controls Switch-Left.