Inspection method for sensors
- Connect the M-MDS to DLC-2.
- Switch the ignition to ON (engine off). NOTE: If engine starts and runs, perform the following steps at idle.
- Access the PIDs for the switch you are inspecting.
- Vibrate the sensor slightly with your finger. If the PID value is unstable or malfunction occurs, check for poor connection and/or poorly mounted sensor.
SYMPTOM TROUBLESHOOTING [DYNAMIC STABILITY CONTROL (DSC)]
- Verify the symptoms and perform troubleshooting according to the appropriate number.
| No. | Symptom |
|---|
| 1 | Any of the following lights do not illuminate with switch the ignition to ON: ABS warning light Brake system warning light DSC indicator light DSC OFF light |
| 2 | Any of the following lights stay on: ABS warning light Brake system warning light DSC indicator light DSC OFF light |
| 3 | There is a malfunction in the system even though ABS warning light, brake system warning light, DSC indicator light and DSC OFF light do not illuminate |
| 4 | ABS or TCS *1 operates frequently/TCS does not work correctly |
| 5 | DSC *2 operates frequently/DSC does not work correctly |
| *1 DSC system function contains traction control function, DSC indicator light goes on and off while DSC operates. *2 DSC indicator light goes on and off while DSC operates. |
Dynamic Stability Control (DSC) Troubleshooting Chart. Scheme 65
Scheme 65: Dynamic Stability Control (DSC) Troubleshooting Chart
Diagnostic procedure
STEP INSPECTION ACTION 1 VERIFY WHETHER MALFUNCTION IS IN WARNING LIGHT AND INDICATOR LIGHT'S COMMON POWER SUPPLY OR IN OTHER WARNING LIGHTS AND INDICATOR LIGHT Connect the M-MDS to the DLC-2. Turn on all warning lights and indicator lights using the instrument cluster PID WL+IL of active command modes. Do the other warning and indicator lights illuminate? Yes Go to Step 5. No If the communication error message is displayed on M-MDS screen: Go to the next step. If the communication error message is not displayed: Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .) 2 INSPECT INSTRUMENT CLUSTER POWER SUPPLY FUSE Switch the ignition to off. Disconnect the negative battery cable. Inspect the instrument cluster ignition power supply fuse. Is the fuse normal? Yes Go to the next step. No Inspect for short to ground in ignition power supply circuit. Repair or replace if necessary. Install the appropriate amperage fuse. *3 INSPECT INSTRUMENT CLUSTER POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT Reconnect the negative battery cable. Switch the ignition to ON. Measure the voltage at instrument cluster terminal 2S (wiring harness-side). Is the voltage approx. 12 V ? Yes Go to the next step. No Repair or replace the wiring harness for a possible open circuit. *4 INSPECT INSTRUMENT CLUSTER GROUND CIRCUIT FOR OPEN CIRCUIT Switch the ignition to off. Disconnect the negative battery cable. Disconnect the instrument cluster connector. Inspect for continuity between instrument cluster terminal 2K (wiring harness-side) and body ground. Is there continuity? Yes Replace the instrument cluster (open circuit in instrument cluster). (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .) No Repair or replace the wiring harness for a possible open circuit. 5 CONFIRM DSC DTC Retrieve the DSC DTC using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) Are any DTCs present? Yes Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) No If the communication error message is displayed in M-MDS screen: Go to the next step. If the communication error message is not displayed: Go to Step 9. 6 INSPECT DSC HU/CM POWER SUPPLY FUSE Switch the ignition to off. Disconnect the negative battery cable. Inspect the DSC HU/CM ignition power supply fuse. Is the fuse normal? Yes Go to the next step. No Inspect for a short to ground in ignition power supply circuit. Repair or replace if necessary. Install appropriate amperage fuse. *7 INSPECT DSC HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT Reconnect the negative battery cable. Switch the ignition to ON. Measure the voltage at DSC HU/CM terminal Y (wiring harness-side). Is the voltage approx. 12 V ? Yes Go to the next step. No Repair or replace the wiring harness for a possible open circuit. *8 INSPECT DSC HU/CM GROUND CIRCUIT FOR OPEN CIRCUIT Switch the ignition to off. Disconnect the negative battery cable. Disconnect the DSC HU/CM connector. Inspect for continuity between DSC HU/CM terminal B (wiring harness-side) and body ground. Is there continuity? Yes Replace the DSC HU/CM (open circuit in DSC CM). (See DSC HU/CM REMOVAL/INSTALLATION .) No Repair or replace the wiring harness for a possible open circuit. 9 CONFIRM INSTRUMENT CLUSTER DTC Retrieve the instrument cluster DTC using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER] .) Are any DTCs present? Yes Go to the applicable DTC troubleshooting. (See DTC TABLE [INSTRUMENT CLUSTER] .) No Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
Scheme 66
Scheme 66: Diagnostic procedure
- When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.
STEP INSPECTION ACTION 1 INSPECT BRAKE FLUID LEVEL Inspect the brake fluid level. Is the brake fluid level normal? Yes Go to the next step. No Add the brake fluid. If the brake fluid refilled: Inspect and repair brake line for leakage. 2 VERIFY PARKING BRAKE Verify the parking brake. Is the parking brake lever released? Yes Go to the next step. No Release the parking brake lever. 3 CONFIRM SYMPTOM Confirm the brake system warning light. Is it only brake system warning light remains on? Yes Go to the next step. No Go to Step 6. 4 INSPECT WHETHER MALFUNCTION IS IN BRAKE SYSTEM WARNING LIGHT RELATED SWITCHES OR ELSEWHERE Inspect for following part: Parking brake switch (See PARKING BRAKE SWITCH INSPECTION .) Brake fluid level sensor (See BRAKE FLUID LEVEL SENSOR INSPECTION .) Is there any malfunction? Yes Replace the malfunctioning part according to the inspection results. (See PARKING BRAKE LEVER REMOVAL/INSTALLATION .) (See MASTER CYLINDER REMOVAL/INSTALLATION [MZR 2.0, SKYACTIV-G 2.0, MZR 2.5] .) (See MASTER CYLINDER REMOVAL/INSTALLATION [MZR 2.3 DISI TURBO] .) No Go to the next step. *5 INSPECT FOR SHORT TO GROUND IN WIRING HARNESS BETWEEN BCM AND BRAKE SYSTEM WARNING LIGHT RELATED SWITCHES Switch the ignition to off. Disconnect the negative battery cable. Disconnect the parking brake switch and brake fluid level sensor connectors. Inspect for continuity between the following terminals (wiring harness-side) and body ground: Parking brake switch terminal A Brake fluid level sensor terminal A Is there continuity? Yes Repair or replace the wiring harness for a possible short to ground. No Retrieve the BCM DTC using the M-MDS. (See DTC INSPECTION [BCM] .) If the DTC present: Go to the applicable DTC inspection. (See DTC TABLE [BCM] .) If the DTC does not present: Replace the BCM. (See BODY CONTROL MODULE (BCM) REMOVAL/INSTALLATION .) 6 CONFIRM DSC DTC Retrieve the DSC DTC using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) Are any DTCs present? Yes Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) No If the communication error message is displayed on the M-MDS screen: Go to the next step. If the communication error is not displayed: Go to Step 11. 7 INSPECT DSC HU/CM CONNECTOR AND TERMINALS Switch the ignition to off. Disconnect the negative battery cable. Disconnect the DSC HU/CM connector. Inspect for poor connection (such as damaged/pulled-out pins, corrosion). Is there any malfunction? Yes Repair or replace the connector and/or terminals, then go to Step 11. No Go to the next step. 8 INSPECT DSC HU/CM POWER SUPPLY FUSE Inspect the DSC HU/CM ignition power supply fuse. Is the fuse normal? Yes Go to the next step. No Inspect for open circuit in DSC HU/CM ignition power supply circuit. Repair or replace if necessary. Install appropriate amperage fuse. *9 INSPECT DSC HU/CM POWER SUPPLY CIRCUIT FOR OPEN CIRCUIT DSC HU/CM connector is disconnected. Reconnect the negative battery cable. Switch the ignition to ON. Measure the voltage at DSC HU/CM terminal Y (wiring harness-side). Is the voltage approx. 12 V ? Yes Go to the next step. No Repair or replace the wiring harness for a possible open circuit. *10 INSPECT DSC HU/CM GROUND CIRCUIT FOR OPEN CIRCUIT DSC HU/CM connector is disconnected. Switch the ignition to off. Disconnect the negative battery cable. Inspect for continuity between DSC HU/CM terminal B (wiring harness-side) and body ground. Is there continuity? Yes Replace the DSC HU/CM (open circuit in DSC CM). (See DSC HU/CM REMOVAL/INSTALLATION .) No Repair or replace the wiring harness for a possible open circuit. 11 CONFIRM INSTRUMENT CLUSTER DTC Retrieve the instrument cluster DTC using the M-MDS. (See DTC INSPECTION [INSTRUMENT CLUSTER] .) Are any DTCs present? Yes Go to the applicable DTC inspection. (See DTC TABLE [INSTRUMENT CLUSTER] .) No Go to the next step. 12 VERIFY WHETHER MALFUNCTION IS IN INSTRUMENT CLUSTER OR BCM Turn off and on all warning light and indicator lights using the instrument cluster PID WL+IL of active command modes using the M-MDS. Do the ABS warning light, brake system warning light, DSC indicator light and DSC OFF light turn on and off according to active command modes? Yes Replace the DSC HU/CM (internal fault). (See DSC HU/CM REMOVAL/INSTALLATION .) No Replace the instrument cluster. (See INSTRUMENT CLUSTER REMOVAL/INSTALLATION .)
- When performing an asterisked (*) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.
| STEP | INSPECTION | ACTION |
|---|
| 1 | CONFIRM DSC DTC Retrieve the DSC DTC using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) |
| No | Go to the next step. |
| 2 | VERIFY SOLENOID VALVE OPERATION Switch the ignition to off. Connect the M-MDS to the DLC-2. Switch the ignition to ON (engine off). Access the active command mode for the solenoid valve using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) Does the solenoid valve operate properly? | Yes | Inspect the conventional brake system. Repair or replace if necessary. |
| No | Repair or replace the malfunctioning part. |
| STEP | INSPECTION | ACTION |
|---|
| 1 | CONFIRM DSC AND/OR PCM DTC Retrieve the DSC DTC using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) Perform the PCM DTC using the M-MDS, if the traction control function has a problem. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.0, MZR 2.5] .) (See ON-BOARD DIAGNOSTIC TEST [MZR 2.3 DISI TURBO] .) Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) (See DTC TABLE [MZR 2.0, MZR 2.5] .) (See DTC TABLE [MZR 2.3 DISI TURBO] .) |
| No | Go to the next step. |
| 2 | INSPECT TIRE SIZE AND AIR PRESSURE Inspect the tire size and air pressure. Are size and air pressure as specified? | Yes | Go to the next step. |
| No | Replace with the specified tires and adjust the tire air pressure. |
| * 3 | INSPECT ABS WHEEL-SPEED SENSOR OUTPUT PULSE Perform the Voltage Pattern Inspection for each ABS wheel-speed sensor. (See FRONT ABS WHEEL-SPEED SENSOR INSPECTION .) (See REAR ABS WHEEL-SPEED SENSOR INSPECTION .) Is the output voltage pattern normal? | Yes | Found the malfunctioning part according to Intermittent Concern Troubleshooting. (See PRECAUTION [DYNAMIC STABILITY CONTROL (DSC)] .) |
| No | Inspect the ABS wheel-speed sensor and ABS sensor rotor for poor installation. |
- When performing an asterisked ( * ) troubleshooting inspection, shake the wiring harness and connectors while doing the inspection to discover whether poor contact points are the cause of any intermittent malfunctions. If there is a problem, check to make sure connectors, terminals and wiring harness are connected correctly and undamaged.
| STEP | INSPECTION | ACTION |
|---|
| 1 | CONFIRM DSC DTC Retrieve the DSC DTC using the M-MDS. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See ON-BOARD DIAGNOSIS [DYNAMIC STABILITY CONTROL (DSC)] .) |
| No | Go to the next step. |
| 2 | INSPECT INSTALLATION OF SAS CONTROL MODULE AND STEERING ANGLE SENSOR Inspect the installation of SAS control module and steering angle sensor. Are the sensors securely installed? | Yes | Go to the next step. |
| No | Install the malfunctioning sensor securely. (See SAS CONTROL MODULE REMOVAL/INSTALLATION .) (See STEERING ANGLE SENSOR REMOVAL/INSTALLATION .) |
| 3 | INSPECT INITIALIZATION OF SAS CONTROL MODULE AND STEERING ANGLE SENSOR Inspect the initialization of SAS control module and steering angle sensor. Did the sensors initialize after replacement of DSC HU/CM? | Yes | Found the malfunctioning part according to Intermittent Concern Troubleshooting. (See PRECAUTION [DYNAMIC STABILITY CONTROL (DSC)] .) |
| No | Perform the initialization procedure. (See DSC SENSOR INITIALIZATION PROCEDURE ,) |
