Antilock Brake System, Traction Control System & Stability Control System Cadillac CTS I

Fastener Tightening Specifications

Fastener Tightening Specifications

ABS Schematic Icons

ABS Schematic Icons Icon Icon Definition IMPORTANT: Twisted-pair wires provide an effective shield that helps protect sensitive electronic components from electrical interference. If the wires were covered with shielding, install new shielding. In order to prevent electrical interference from degrading the performance of the connected components, you must maintain the proper specification when making any repairs to the twisted-pair wires shown : The wires must be twisted a minimum of 10 turns per 31 cm (12 in) as measured anywhere along the length of the wires The outside diameter of the twisted wires must not exceed 6.0 mm (0.25 in)

Scheme 1

Scheme 2

Scheme 3

Scheme 4

Scheme 5

Scheme 6

Scheme 7

Scheme 8

Scheme 9

Scheme 10

Scheme 11

ABS Connector End Views

Brake Pedal Position (BPP) Sensor Connector End Views Connector Part Information 15332132 3-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit Number Function A BN 5360 Low Reference B YE 5361 Brake Pedal Position (BPP) Sensor Signal C WH 5359 5-Volt Reference

Brake Fluid Pressure Sensor Connector End Views (LA3/LY9/LY7) Connector Part Information 15393906 3-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit Number Function A GY/BK 1337 5-Volt Reference B PU 5002 Brake Fluid Pressure Sensor Signal C L-GN/BK 1338 Low Reference

Brake Fluid Pressure Sensor Connector End Views (LS6) Connector Part Information 2-967642-1 3-Way F Amp (BK) Pin Wire Color Circuit Number Function 1 L-GN/BK 1338 Low Reference 2 PU 5002 Brake Fluid Pressure Sensor Signal 3 GY/BK 1337 5-Volt Reference

Electronic Brake Control Module Connector End Views (EBCM) Connector Part Information 15411019 50-Way F Packard (BK) Pin Wire Color Circuit Number Function A RD/BK 342 Battery Positive Voltage B RD/BK 342 Battery Positive Voltage C PK 39 Ignition 1 Voltage D - - Not Used E BK 1150 Ground F BK 1150 Ground G GY 1787 Variable Effort Steering Actuator High Effort Control (FE3) H WH 345 Variable Effort Steering Actuator Low Effort Control (FE3) A1 L-BU 830 Left Front Wheel Speed Sensor Signal A2 YE 873 Left Front Wheel Speed Sensor Low Reference A3 D-GN 872 Right Front Wheel Speed Sensor Signal A4 TN 833 Right Front Wheel Speed Sensor Low Reference A5 TN 884 Left Rear Wheel Speed Sensor Signal A6 OG 885 Left Rear Wheel Speed Sensor Low Reference A7 BN 882 Right Rear Wheel Speed Sensor Signal A8 WH 883 Right Rear Wheel Speed Sensor Low Reference A9 - - Not Used A10 D-BU 1537 ABS Indicator Signal A11 - - Not Used A12 YE/BK 5270 Traction Control Data Signal (LA3/LY9/LY7) A13 PU 1807 Class 2 Serial Data A14 PU 1807 Class 2 Serial Data B1-B2 - - Not Used B3 YE 5361 Brake Pedal Position (BPP) Sensor Signal B4-B5 - - Not Used B6 TN/BK 464 Delivered Torque Signal B7 - - Not Used B8 OG/BK 463 Requested Torque Signal B9-B12 - - Not Used B13 L-GN/BK 1338 Low Reference B14 GY/BK 1337 5-Volt Reference C1-C2 - - Not Used C3 OG 5371 BAS Relay Coil Supply Voltage C4 - - Not Used C5 GY 847 Extended Travel Brake Switch Signal C6 L-BU 1764 Steering Wheel Position Signal B (JL4) C7 L-GN 1763 Steering Wheel Position Signal A (JL4) C8 D-BU 716 Yaw Rate Sensor Signal (JL4) C9 L-BU 715 Lateral Accelerometer Signal (JL4) C10 PU 5002 Brake Fluid Pressure Sensor Signal C11 - - Not Used C12 BN 5360 Low Reference C13 WH 5359 5-Volt Reference C14 - - Not Used

Steering Wheel Position Sensor Connector End Views (JL4&J56) Connector Part Information 12064978 6-Way F Micro-Pack 100 Series (GY) Pin Wire Color Circuit Number Function 1 GY/BK 1337 5-Volt Reference 2 L-GN/BK 1338 Low Reference 3-4 - - Not Used 5 L-GN 1763 Steering Wheel Position Signal A 6 L-BU 1764 Steering Wheel Position Signal B

Traction Control Switch Connector End Views Connector Part Information 12052832 2-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit Number Function A BN/WH 1571 Traction Control Switch Signal B BK 350 Ground

Wheel Speed Sensor (WSS) Connector End Views - LF Connector Part Information 12052644 2-Way F Metri-Pack 150 (L-GY) Pin Wire Color Circuit Number Function A L-BU 830 Left Front Wheel Speed Sensor Signal B YE 873 Left Front Wheel Speed Sensor Low Reference

Wheel Speed Sensor (WSS) Connector End Views - LR Connector Part Information 12052644 2-Way F Metri-Pack 150 Series (L-GY) Pin Wire Color Circuit Number Function A TN 884 Left Rear Wheel Speed Sensor Signal B OG 885 Left Rear Wheel Speed Sensor Low Reference

Wheel Speed Sensor (WSS) Connector End Views - RF Connector Part Information 12052644 2-Way F Metri-Pack 150 (L-GY) Pin Wire Color Circuit Number Function A D-GN 872 Right Front Wheel Speed Sensor Signal B TN 833 Right Front Wheel Speed Sensor Low Reference

Wheel Speed Sensor (WSS) Connector End Views - RR Connector Part Information 12052644 2-Way F Metri-Pack 150 Series (L-GY) Pin Wire Color Circuit Number Function A BN 882 Right Rear Wheel Speed Sensor Signal B WH 883 Right Rear Wheel Speed Sensor Low Reference

Yaw Rate and Lateral Acceleration Sensor Connector End Views (JL4) Connector Part Information 15326822 5-Way F Metri-Pack 150 Series (BK) Pin Wire Color Circuit Number Function A - - Not Used B GY/BK 1337 5-Volt Reference C D-BU 716 Yaw Rate Sensor Signal D L-GN/BK 1338 Low Reference E L-BU 715 Lateral Accelerometer Signal

Diagnostic Starting Point - Antilock Brake System

Begin the system diagnosis with Diagnostic System Check - ABS . The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system
2. The ability of the control modules to communicate through the serial data circuit
3. The identification of any stored diagnostic trouble codes (DTCs) and their status

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Circuit Description

The ABS Diagnostic System Check is an organized approach to identify problems associated with the EBCM. This check must be the starting point for any EBCM complaint, and will direct you to the next logical step in diagnosing the complaint. The EBCM is a very reliable component and is not likely the cause of the malfunction. Most system complaints are linked to faulty wiring, connectors, and occasionally to components. Understanding the ABS system and using the tables correctly will reduce diagnostic time and prevent unnecessary parts replacement.

Test Description

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Lack of communication may be due to a partial malfunction of the serial data circuit or due to a total malfunction of the serial data circuit. The specified procedure will determine the particular condition.
2. 4: The presence of DTCs which begin with "U" indicate some other module is not communicating. The specified procedure will compile all the available information before tests are performed.

Diagnostic System Check - ABS

Scan Tool Output Controls

Electronic Brake Control Module (EBCM)

Scan Tool Data List

Dash Integration Module (DIM)

Electronic Brake Control Module (EBCM)

Instrument Panel Cluster (IPC)

Engine Control Module (ECM)

Rear Integration Module (RIM)

Diagnostic Trouble Code (DTC) List

Diagnostic Trouble Code (DTC) List

Diagnostic Test Drive

When servicing vehicles with the vehicle stability enhancement system (VSES), test drives will be necessary to allow all tests to be run, and all system functions to be enabled and exercised. A test drive may also be required to duplicate specific DTCs covered in this section. The diagnostic system check (including test drive) should be run when vehicle repairs are complete in order to verify the repair. The diagnostic test drive will vary for ABS, TCS, or VSES concerns.

The following is a suggested VSES diagnostic test drive.

1. Read the Diagnostic Aids and the Conditions for Setting the DTC.
2. Turn OFF the ignition.
3. Reconnect any previously disconnected components.
4. Start the engine.
5. Install a scan tool.
6. With the scan tool, observe the VSES Is Centered parameter in the VSES data list. The scan tool will indicate Yes with the steering wheel centered. Drive the vehicle in a straight line for 45 seconds at 24 km/h (15 mph) while monitoring the scan tool.
7. Remove the scan tool.
8. Drive the vehicle under the following conditions for at least 10 minutes. Highway driving Rough roads Perform turning maneuvers (curved freeway entrance ramp, parking lot maneuvers) and high steering angles and yaw rates at low speeds. Verify the customers concern and duplicate driving conditions
9. With the engine still running, use the scan tool in order to check for DTCs. If any DTCs are set, refer to «Diagnostic Trouble Code (DTC) List»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__diagnostic-trouble-code-dtc-list) .

History Data

Enhanced diagnostic information is found in the History Data function of the scan tool. Enhanced diagnostic information provides the service technician with specific malfunction occurrence information.

The scan tool will display the last 3 DTCs to occur, one at a time. The DTC with the most recent occurrence will be displayed first. Each DTC will include the following

1. The number of drive cycles since the DTC last occurred.
2. The number of occurrences for the DTC since the scan tool DTC information was last cleared.

The most recent DTC will also display various data parameters with values from the time of the DTC occurrence.

Diagnostic Strategy

In difficult diagnostic situations use the above information to identify malfunction occurrence trends. Ask question such as the following

1. Did the malfunction only occur once over a large number of drive cycles, indicating an unusual condition present when it occurred?
2. Does the malfunction occur infrequently over a large number of drive cycles, indicating that special diagnostic techniques may be required to identify the source of the malfunction?

A malfunction that occurs more frequently increases the odds of finding the cause of the malfunction.

Use the information in order to determine if a DTC is intermittent. Use the information in order to determine if the DTC has not set for long periods of time due to weather changes or a repair prior to this visit.

The instrument cluster controls the operation of the ABS indicator. The electronic brake control module (EBCM) reports the desired status of the ABS indicator via serial data messages. The ABS indicator signal circuit is a back-up reporting circuit to the serial data messages. The EBCM supplies ground through the circuit when the ABS is operating properly. When there is a problem with ABS that should turn on the ABS indicator, the EBCM opens the ABS indicator signal circuit. If there is a problem with the ABS serial data messages, the instrument cluster uses the ABS indicator signal to determine if the ABS indicator should be illuminated. Using the serial data messages and back-up circuit, the instrument cluster decides whether to turn on the ABS indicator.

Conditions for Running the DTC

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

Conditions for Setting the DTC

One of the following conditions exist for 0.3 seconds

1. The ABS indicator signal circuit voltage is greater than 9 volts when the ABS indicator is commanded ON.
2. The ABS indicator signal circuit voltage is less than 3 volts when the ABS indicator is commanded OFF.

Action Taken When the DTC Sets

1. The ABS remains functional.
2. The ABS indicator remains OFF.

Conditions for Clearing the DTC

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Diagnostic Aids

The following conditions may cause this concern

1. Open, short to ground, or short to voltage.
2. Internal EBCM failure.
3. Internal IPC failure.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Use the scan tool to verify the normal state of the ABS indicator signal circuit.
2. 3: Ensure that the instrument panel cluster can operate the ABS indicator.

DTC B0665

As the wheel spins, the wheel speed sensor produces an AC signal. The electronic brake control module (EBCM) uses the frequency of the AC signal to calculate the wheel speed.

C0035, C0040, C0045, or C0050

The ignition is ON.

C0036, C0037, C0041, C0042, C0046, C0047, C0051, or C0052

1. DTCs C0035, C0040, C0045, or C0050 are not set.
2. The brake pedal is not pressed.
3. The ABS is not active.

One of the following conditions exists for 0.02 seconds

1. A short to voltage - the wheel speed sensor signal circuit and wheel speed sensor return circuit voltages are both greater than 4.25 volts.
2. A short to ground - the wheel speed sensor signal circuit and wheel speed sensor return circuit voltages are both less than 0.75 volts.
3. An open - the wheel speed sensor signal circuit voltage is greater than 4.25 volts and wheel speed sensor return circuit voltage is less than 0.75 volts.

C0036, C0041, C0046, or C0051

The EBCM detects a rapid variation in the wheel speed. The wheel speed changes by 16 km/h (10 mph) or more in 0.01 second. The change must occur 3 times with no more than 0.2 seconds between occurrences.

C0037, C0042, C0047, or C0052

All of the following conditions exists for 2.5 seconds

1. The suspect wheel speed equals zero.
2. The other wheel speeds are greater than 8 km/h (5 mph).
3. The other wheel speeds are within 11 km/h (7 mph) of each other.

If equipped, the following actions occur

1. The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle.
2. The DRP does not function optimally.
3. The ABS indicator turns ON.
4. The Traction Control indicator turns ON.
5. The DIC displays the Service Stability System message.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

If the customer comments that the ABS indicator is ON only during moist environmental conditions (rain, snow, vehicle wash, etc.), inspect the wheel speed sensor wiring for signs of water intrusion. If the DTC is not current, clear all DTCs and simulate the effects of water intrusion by using the following procedure

1. Spray the suspected area with a 5 percent saltwater solution. To create a 5 percent saltwater solution, add 2 teaspoons (9.9 ml) of salt to 354 ml (12 oz) of water.
2. Test drive the vehicle over various road surfaces (bumps, turns, etc.) above 40 km/h (25 mph) for at least 30 seconds.
3. If the DTC returns, replace the suspected wheel speed sensor or repair the wheel speed sensor wiring.
4. Rinse the area thoroughly when completed.

A possible cause of this DTC is electrical noise on the wheel speed sensor harness wiring. Electrical noise could result from the wheel speed sensor wires being routed to close to high energy ignition system components, such as spark plug wires.

One of the following conditions may exist

1. The wheel speed sensor inputs are shorted together.
2. Internal malfunction of the wheel speed sensor.
3. The other wheel speeds are within 11 km/h (7 mph) of each other.

Diagnose each wheel speed sensor individually.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: Measure the resistance of the wheel speed sensor in order to determine if the sensor has a valid resistance value.
2. 4: Ensures that the wheel speed sensor is generating a valid AC voltage output.

DTC C0035-C0052

The system relay is energized when the ignition is ON. The system relay supplies voltage to the solenoid valves and the pump motor. This voltage is referred to as the system voltage.

The electronic brake control module (EBCM) controls each solenoid valve by grounding the solenoid.

The EBCM controls the pump motor by grounding the control circuit. The pump serves 2 purposes

1. Transfers brake fluid from the brake calipers to the master cylinder reservoir during pressure decrease events.
2. Transfers brake fluid from the master cylinder reservoir to the brake calipers during pressure increase events.

1. The pump motor is commanded ON.
2. The system voltage is greater than 8 volts.

One of the following conditions exists for 0.5 seconds

1. With the commanded pump motor voltage less than the system voltage, the actual pump motor voltage is 3 volts less than the commanded voltage.
2. With the commanded pump motor voltage greater than the system voltage, the actual pump motor voltage is less than 8 volts.

If equipped, the following actions occur

1. The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle.
2. The DRP does not function optimally.
3. The ABS indicator turns ON.
4. The Traction Control indicator turns ON.
5. The DIC displays the Service Stability System message.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

The pump motor is integral to the BPMV. The pump motor is not serviceable.

The number below refers to the step number on the diagnostic table.

1. 3: Tests the ability of the EBCM to control the pump motor. If the test lamp illuminates, the pump motor circuit within the EBCM is good.

DTC C0113-C0115

The system relay is energized when the ignition is ON. The system relay supplies voltage to the solenoid valves and the pump motor. This voltage is referred to as the system voltage.

The electronic brake control module (EBCM) controls each solenoid valve by grounding the solenoid.

The EBCM controls the pump motor by grounding the control circuit. The pump serves 2 purposes

1. Transfers brake fluid from the brake calipers to the master cylinder reservoir during pressure decrease events.
2. Transfers brake fluid from the master cylinder reservoir to the brake calipers during pressure increase events.

1. The ignition voltage is greater than 10.5 volts.
2. The system relay is commanded ON.

The system voltage is less than 8 volts for 0.23 seconds.

If equipped, the following actions occur

1. The EBCM disables the DRP/ABS/TCS/VSES for the duration of the ignition cycle.
2. The ABS indicator turns ON.
3. The Traction Control indicator turns ON.
4. The DIC displays the Service Stability System message.
5. The EBCM will also set DTC C0281.
6. The red Brake warning indicator turns ON.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

The system relay is integral to the EBCM. The relay is not serviceable.

The number below refers to the step number on the diagnostic table.

1. 2: Determines whether the DTC is current.

DTC C0121

The electronic brake control module (EBCM) uses the input from the brake fluid pressure sensor for more accurate braking control during vehicle stability enhancement system (VSES).

The ignition is ON for 1.0 second.

One of the following conditions exists for 0.1 seconds.

1. The brake fluid pressure sensor signal is greater than 4.9 volts.
2. The brake fluid pressure sensor signal is less than 0.15 volts.

1. The EBCM disables the VSES for the duration of the ignition cycle.
2. ACC braking function disabled.
3. TCS is degraded.
4. The Traction Control and Active Handling indicator turns ON.
5. The DIC displays the Service Active Handling message.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

1. Find out from the driver under what conditions the DTC was set (when the DIC displayed the Service Stabilitrak message). This information will help to duplicate the failure.
2. The Snapshot function on the scan tool can help find an intermittent DTC.
3. A deceleration cycle consists of the following sequence: The vehicle speed is greater than 24 km/h (15 mph). The vehicle decelerates more than 8 km/h/second (5 mph/second) for 2 seconds. The vehicle speed decelerates to less than 16 km/h (10 mph).

The numbers below refer to the step numbers on the diagnostic table.

1. 3: Tests for the proper operation of the circuit in the low voltage range.
2. 4: Tests for the proper operation of the circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
3. 5: Tests for a short to voltage in the 5-volt reference circuit.
4. 6: Tests for a high resistance or an open in the low reference circuit.

DTC C0136

The electronic brake control module (EBCM) uses the input from the brake fluid pressure sensor for more accurate braking control during vehicle stability enhancement system (VSES).

C0138

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

C0139

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.
3. The vehicle speed is greater than 16 km/h (10 mph).

The vehicle speed exceeds 25 km/h (15 mph) then decelerates by 11.5 km/h (7 mph) per second and the brake pressure never increases.

One of the following conditions occur

1. Brake pressure does not change after brake pedal has been applied twice.
2. While brake pressure is greater than 50 psi, the vehicle speed exceeds 40 km/h (24 mph) and vehicle acceleration exceeds 8 km/h (5 mph) per second twice.

1. The EBCM disables the PBA/TCS/VSES for the duration of the ignition cycle.
2. The Traction Control and Active Handling indicator turns ON.
3. The DIC displays the Service Stability System message.
4. The ABS remains functional.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

1. Find out from the driver under what conditions the DTC was set (when the DIC displayed the Service Active Handling message). This information will help to duplicate the failure.
2. The Snapshot function on the scan tool can help find an intermittent DTC.
3. Brake pressure sensor internal malfunction.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: Tests for the proper operation of the circuit in the low voltage range.
2. 4: Tests for the proper operation of the circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
3. 5: Tests for a short to voltage in the 5 volt reference circuit.
4. 6: Tests for a high resistance or an open in the low reference circuit.

DTC C0138 or C0139

The brake pedal position sensor (BPP) is an input to the electronic brake control module (EBCM). The brake pedal position sensor is a potentiometer type sensor with a 5-volt reference circuit and a low reference circuit. The BCM supplies the 5-volt reference to the BPP.

C0163

The ignition is ON.

C0164

The vehicle speed is greater than 40 km/h (25 mph).

The brake pedal position sensor input voltage is between 1.87 volts and 5.03 volts for 2 seconds.

The brake pedal position sensor input was active for 2 consecutive ignition cycles.

If equipped, the following actions occur

1. The EBCM disables the TCS/VSES for the duration of the ignition cycle.
2. The Traction Control and Active Handling indicator turns ON.
3. The DIC displays the following messages: Service Traction System Service Active Handling
4. The ABS remains functional.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Possible causes of this DTC are the following conditions

1. A signal circuit of the brake pedal position sensor is open.
2. The BPP sensor needs calibration.
3. All brake lamps are open.
4. All brake lamp grounds are open.
5. An internal EBCM problem.

Possible causes of this DTC are the following conditions

1. The brake pedal position sensor circuit is shorted to voltage.
2. The brake pedal position sensor is misadjusted.
3. The brake pedal position sensor is stuck closed.
4. A brake pedal that is binding.

The number below refers to the step number on the diagnostic table.

1. 2: Test for the current state of the BPP sensor.

DTC C0163 or C0164

The electronic brake control module (EBCM) uses the lateral accelerometer signal to determine the lateral forces acting on a vehicle during a turn or a skid. The EBCM uses the signal from the lateral accelerometer as one of the inputs to operate the vehicle stability enhancement system (VSES).

DTC Descriptors

This diagnostic procedure supports the following DTCs

1. DTC C0186 Lateral Accelerometer Circuit
2. DTC C0187 Lateral Accelerometer Circuit Range/Performance

C0186

Ignition voltage is greater than 8 volts.

C0187

1. Ignition voltage is greater than 8 volts.
2. No yaw rate DTCs are present.
3. Vehicle yaw rate is centered.

Lateral accelerometer signal voltage is less than 0.18 volt or above 4.84 volts.

C0187

The EBCM will set the DTC when one or more of the following conditions have occurred

1. The lateral acceleration signal changes to rapidly based on vehicle dynamics.
2. The internal calibration in the lateral accelerometer is out of range.
3. The lateral accelerometer has failed and internal self check test.

If equipped, the following actions will occur

1. The EBCM disables VSES for the duration of the ignition cycle.
2. The driver information center (DIC) displays the Service Stability System message.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

The lateral accelerometer is packaged with the yaw rate sensor as a single component.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Tests for the proper voltage output on the 5-volt reference circuit and the proper operation of the signal circuit.
2. 3: Tests for possible low 5-volt reference output or a problem with the signal circuit.
3. 4: Tests for a short to voltage on the 5-volt reference circuit. If a short to voltage exists, other DTCs may be set for the vehicle stability system.
4. 8: Tests for a problem with the low reference circuit. If a short to voltage exists, other DTCs may be set for the vehicle stability system.

DTC C0186 or C0187

The electronic brake control module (EBCM) uses the yaw rate signal to determine the directional angle of the vehicle during a turn or a skid. The EBCM uses the signal from the yaw rate as one of the inputs to operate the vehicle stability enhancement system (VSES).

DTC Descriptor

This diagnostic procedure supports the following DTC

DTC C0196 Yaw Rate Circuit

The ignition voltage is greater than 8 volts.

The EBCM will set the DTC when one or more of the following conditions have occurred

1. The yaw rate signal is less than 0.18 volt or greater than 4.84 volts.
2. The yaw rate signal changes to rapidly based on vehicle dynamics.
3. The internal calibration in the yaw rate is out of range.
4. The yaw and lateral acceleration sensor has failed and internal self check test.

If equipped, the following actions will occur

1. The EBCM disables VSES for the duration of the ignition cycle.
2. The driver information center (DIC) displays the Service Stability System message.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

The lateral accelerometer is packaged with the yaw rate sensor as a single component.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Tests for the proper voltage output on the 5-volt reference circuit and the proper operation of the signal circuit.
2. 3: Tests for possible low 5-volt reference output or a problem with the signal circuit.
3. 4: Tests for a short to voltage on the 5-volt reference circuit. If a short to voltage exists, other DTCs may be set for the vehicle stability system.
4. 8: Tests for a problem with the low reference circuit. If a short to voltage exists, other DTCs may be set for the vehicle stability system.

DTC C0196

The system relay is energized when the ignition is ON. The system relay supplies voltage to the valve relay. The electronic brake control module (EBCM) activates the valve relay to supply voltage to the valve solenoids. This voltage is referred to as the system voltage. The EBCM microprocessor activates individual valve solenoids by grounding the valve solenoid control circuits.

1. The ignition is ON.
2. The vehicle is experiencing an ABS event.

This code is set when the following criteria are met.

1. The EBCM is commanding a valve solenoid to release brake pressure.
2. The wheel that is commanded to release brake pressure has a speed below 5 km/h (3 mph) for 1.25 seconds.

If equipped, the following actions occur.

1. The EBCM disables ABS/TCS.
2. ACC Braking is degraded.
3. VSES is disabled.
4. The ABS indicator turns ON.
5. The traction off indicator turns ON.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

The solenoid valve circuit is internal to the EBCM. The solenoid valve circuit is not diagnosable external to the EBCM. The DTC sets when there is a malfunction in the solenoid circuit internal to the EBCM.

Possible causes for this concern

1. Intermittent wheel speed sensor
2. Wheel speed sensor is equal to 0 km/h (0 mph)
3. Contaminated hydraulic unit

The number below refers to the step number on the diagnostic table.

1. 2: Determines whether the DTC is current.

DTC C0220-C0229

The EBCM and the PCM simultaneously control the traction control. The PCM reduces the amount of torque supplied to the drive wheels by retarding spark timing and selectively turning off fuel injectors. The EBCM actively applies the brakes to the front wheels in order to reduce torque.

The EBCM sends a requested torque message via a pulse width modulated (PWM) signal to the PCM. The duty cycle of the signal is used to determine how much engine torque the EBCM is requesting the PCM to deliver. Normal values are between 10 and 90 percent duty cycle. The signal should be at 90 percent when traction control is not active and at lower values during traction control activations. The PCM supplies a pull up voltage of 5 volts that the EBCM switches to ground to create the signal.

The PCM sends a delivered torque message via a pulse width modulated (PWM) signal to the EBCM. The duty cycle of the signal is used to determine how much engine torque the PCM is delivering. Normal values are between 10 and 90 percent duty cycle. The signal should be at low values (around 10 percent) at idle and higher values under driving conditions. The EBCM supplies a pull up voltage of 12 volts that the PCM switches to ground to create the signal.

When certain PCM DTCs are set, the PCM will not be able to perform the torque reduction portion of traction control. A serial data message is sent to the EBCM indicating that traction control is not allowed.

The engine is running.

The PCM diagnoses the requested torque signal circuit and sends a serial data message to the EBCM indicating that torque reduction is not allowed.

1. The EBCM disables the EDC/TCS for the duration of the ignition cycle.
2. The Traction Off indicator turns ON.
3. The ABS remains functional.

1. The condition for the DTC is no longer present and you used the scan tool Clear DTC function.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
3. The PCM automatically clears the history DTC when a current DTC is not detected in 40 consecutive warm-up cycles.

The following conditions can cause this concern

1. An open in the delivered torque circuit.
2. An short to ground or voltage in the delivered torque circuit.
3. A wiring problem, terminal corrosion, or poor connection in the delivered torque circuit.
4. A communication frequency problem.
5. A communication duty cycle problem.
6. The EBCM is not receiving information from the ECM.
7. Loose or corroded EBCM ground or ECM ground.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Use the scan tool in order to determine if the requested torque signal has a valid duty cycle.
2. 3: Measure the requested torque signal in order to determine if the signal has a valid duty cycle.
3. 4: Measure the requested torque signal in order to determine if the signal has a valid frequency.
4. 10: This vehicle is equipped with a ECM which uses an electrically erasable programmable read only memory (EEPROM). When replacing the ECM, the replacement ECM must be programmed.

DTC C0241 or P0856

The electronic brake control module (EBCM) and the powertrain control module (PCM) simultaneously control the traction control. The EBCM sends a serial data message to the PCM requesting torque reduction. When certain PCM DTCs are set, the PCM will not be able to perform the torque reduction for traction control. A serial data message is sent to the EBCM indicating that traction control is not allowed.

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

The PCM diagnoses a condition preventing the engine control portion of the traction control function and sends a serial data message to the EBCM indicating that torque reduction is not allowed. The PCM will typically set a DTC and the EBCM will set this DTC.

If equipped, the following actions occur

1. The EBCM disables the TCS/VSES for the duration of the ignition cycle.
2. The Traction Control and Active Handling indicator turns ON.
3. The DIC displays the following messages: Service Traction System Service Active Handling
4. The ABS remains functional.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

This DTC is for information only. As an aid to the technician, this DTC indicates that there are no problems in the ABS/TCS system.

DTC C0242

Engine drag control (EDC) The EBCM sends a engine drag control (EDC) request via a dedicated data line. The PCM supplies a pull up voltage of 5 volts that the EBCM switches to ground to create the signal.

The engine is running.

The EBCM receives a serial data message from the PCM indicating that the EDC circuit has failed.

1. The EBCM disables the EDC for the duration of the ignition cycle.
2. The DIC displays the Service Stability System message.
3. The ABS/TCS remains functional.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

The following conditions can cause this concern

1. An open in the EDC control circuit.
2. An short to ground or voltage in the EDC control circuit.
3. A wiring problem, terminal corrosion, or poor connection in the EDC control circuit.

The number below refer to the step number on the diagnostic table.

1. 9: This vehicle is equipped with a ECM which uses an electrically erasable programmable read only memory (EEPROM). When replacing the ECM, the replacement ECM must be programmed.

DTC C0243

The electronic brake control module (EBCM) and the engine control module (ECM) simultaneously control the traction control. The ECM reduces the amount of torque supplied to the drive wheels by retarding spark timing and selectively turning OFF fuel injectors. The EBCM actively applies the brakes to the front wheels in order to reduce torque.

The EBCM sends a requested torque message via a pulse width modulated (PWM) signal to the ECM. The duty cycle of the signal is used to determine how much engine torque the EBCM is requesting the ECM to deliver. Normal values are between 10-90 percent duty cycle. The signal should be at 90 percent when traction control is not active and at lower values during traction control activations. The ECM supplies a pull up voltage of 12 volts that the EBCM switches to ground to create the signal.

The ECM sends a delivered torque message via a PWM signal to the EBCM. The duty cycle of the signal is used to determine how much engine torque the ECM is delivering. Normal values are between 10-90 percent duty cycle. The signal should be at low values, around 10 percent, at idle and higher values under driving conditions. The EBCM supplies a pull up voltage of 12 volts that the ECM switches to ground to create the signal.

When certain ECM DTCs are set, the ECM will not be able to perform the torque reduction portion of traction control. A serial data message is sent to the EBCM indicating that traction control is not allowed.

The engine is running.

C0244

One of the following conditions exists

1. The EBCM detects that delivered torque signal is out of the valid range.
2. The EBCM does not receive the delivered torque signal.

P1689

The ECM detects that the delivered torque signal voltage is invalid.

1. The EBCM disables the EDC/TCS for the duration of the ignition cycle.
2. The ECM will store conditions which were present when the DTC set as Fail Records data only.
3. The Traction Off indicator turns ON.
4. The ABS remains functional.

1. The condition for the DTC is no longer present and you used the scan tool Clear DTC function.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.
3. The ECM automatically clears the history DTC when a current DTC is not detected in 40 consecutive warm-up cycles.

The following conditions can cause this concern

1. An open in the delivered torque circuit.
2. An short to ground or voltage in the delivered torque circuit.
3. A wiring problem, terminal corrosion, or poor connection in the delivered torque circuit.
4. A communication frequency problem.
5. A communication duty cycle problem.
6. The EBCM is not receiving information from the ECM.
7. Loose or corroded EBCM ground or ECM ground.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: Use the scan tool in order to determine if the delivered torque signal has a valid duty cycle.
2. 9: This vehicle is equipped with a ECM which uses an Electrically Erasable Programmable Read Only Memory (EEPROM). When replacing the ECM, the replacement ECM must be programmed.

DTC C0244 or P1689

The vehicle stability enhancement system (VSES) is activated by the electronic brake control module (EBCM) calculating the desired yaw rate and comparing it to the actual yaw rate input. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM will attempt to correct the vehicle's yaw motion by applying differential braking to the left or right front wheel.

The amount of differential braking applied to the left or right front wheel is based on both the yaw rate error and side slip rate error. The side slip rate error is a function of the lateral acceleration minus the product of the yaw rate and vehicle speed. The yaw rate error and side slip rate error are combined to produce the total delta velocity error. When the delta velocity error becomes too large and the VSES system activates, the drivers steering inputs combined with the differential braking will attempt to bring the delta velocity error toward zero.

The VSES activations generally occur during aggressive driving, in the turns or bumpy roads without much use of the accelerator pedal. When braking during VSES activation, the brake pedal will feel different than the ABS pedal pulsation. The brake pedal pulsates at a higher frequency during VSES activation.

1. The steer angle has been centered.
2. The VSES is active.
3. The direction (understeer or oversteer) of the yaw rate error has not changed.
4. The centered lateral acceleration value is less than 0.5 g.
5. The yaw rate error is less than 6 degrees/second.
6. The side slip error is greater than 1.8 meters/second*second.

One of the following conditions exists

1. The yaw rate error is greater than 10 degrees/second with the vehicle speed less than 60 km/h (37 mph) and the acceleration pedal is pressed more than 25 percent of the pedal travel range for 1 second during the VSES activation.
2. With the yaw rate less than 8 degrees/second, the side slip error is greater than 4.9 meters/second 2 for 5 seconds.

1. The EBCM disables the VSES for the duration of the ignition cycle.
2. The DIC displays the Service Stability System message.
3. The ABS/TCS remains functional.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

The following conditions can cause this concern

1. Improper steering alignment.
2. Open, short to ground, or short to voltage.
3. Internal lateral accelerometer failure.
4. EBCM internal failure.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Perform the Steering Position Sensor Test in order to verify that the steering wheel position sensor (SWPS) is operating properly.
2. 3: Verify that the lateral accelerometer input parameter is within the valid range.
3. 4: Verify that the yaw rate input parameter is within the valid range.

DTC C0252

The electronic brake control module (EBCM) calibrates the steering sensor output so that the output reads zero when the steering wheel is centered. Using the yaw rate input, lateral accelerometer input, and the wheel speed sensor inputs, the initial steering center position is calculated after driving greater than 10 km/h (6 mph) for more than 10 seconds in a straight line on a level surface.

C0253

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

C0254

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.
3. The steer angle has been centered.

The vehicle speed is greater than 40 km/h (25 mph) for 10 minutes without completing steer angle centering.

The steering sensor bias moves greater than 40 degrees after steer centering was accomplished.

1. The EBCM disables the vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
2. The driver information center (DIC) displays the Service Stability System message.
3. The ABS remains functional.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

1. Check the vehicle for proper alignment. The car should not pull in either direction while driving straight on a level surface.
2. The Snapshot function on the scan tool can help find an intermittent DTC.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Perform the Steering Position Sensor Test in order to verify that the steering wheel position sensor (SWPS) is operating properly.
2. 3: Verify that the lateral accelerometer input parameter is within the valid range.
3. 4: Verify that the yaw rate input parameter is within the valid range.

DTC C0253 or C0254

The dynamic rear proportioning (DRP) is a control system that replaces the hydraulic proportioning function of the mechanical proportioning valve in the base brake system. The DRP control system is part of the operating software in the EBCM. The DRP uses active control with the existing ABS in order to regulate the vehicle's rear brake pressure.

One or more faults have been detected by the EBCM in the ABS/TCS systems.

One of the following conditions exists

1. DTC C0121, C0113, C0114, C0115, C0900, or C0550 sets.
2. Two wheel speed sensor DTCs on the same axle set.

1. The EBCM disables the DRP for the duration of the ignition cycle.
2. The red Brake warning indicator turns ON.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

This DTC is for information only. As an aid to the technician, this DTC indicates that another DTC exists that fails DRP.

The number below refers to the step number on the diagnostic table.

1. 2: Verifies whether other ABS/TCS/VSES DTCs are set.

DTC C0281

The steering wheel position sensor supplies 2 analog inputs, Phase A and Phase B, to the electronic brake control module (EBCM). The 2 input signals are approximately 90 degrees out of phase. By interpreting the relationship between the 2 inputs, the EBCM can determine the position of the steering wheel and the direction of the steering wheel rotation.

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

C0460

One of the following conditions exists

1. Both Phase A and Phase B are greater than 4.9 volts or less than 0.2 volts for 1.6 seconds.
2. The changes in Phase A or Phase B is greater than 36 degrees between consecutive scans of the signal.

C0461

The difference in the phase angle between Phase A and Phase B is greater than 16 degrees continuously for 0.25 seconds.

1. The EBCM disables the vehicle stability enhancement system (VSES) for the duration of the ignition cycle.
2. The driver information center (DIC) displays the Service Stability System message.
3. The ABS remains functional.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

1. Check the vehicle for proper alignment. The car should not pull in either direction while driving straight on a level surface.
2. The Snapshot function on the scan tool can help find an intermittent DTC.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Perform the Steering Position Sensor Test in order to verify if the steering wheel position sensor (SWPS) is operating properly.
2. 3: Tests for the proper operation of the steering wheel position signal A circuit in the low voltage range.
3. 4: Tests for the proper operation of the steering wheel position signal B circuit in the low voltage range.
4. 5: Tests for the proper operation of the steering wheel position signal A circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
5. 6: Tests for the proper operation of the steering wheel position signal B circuit in the high voltage range. If the fuse in the jumper opens when you perform this test, the signal circuit is shorted to ground.
6. 7: Tests for a short to voltage in the 5-volt reference circuit.
7. 8: Tests for a high resistance or an open in the low reference circuit.

DTC C0460 or C0461

The electronic brake control module (EBCM) detects an internal malfunction or loss of ground.

The ignition switch is in the ON position.

1. An internal EBCM malfunction exists.
2. System voltage is less than half the ignition voltage continuously for 0.04 seconds.

If equipped, the following actions occur

1. The Antilock Brake System (ABS)/adaptive cruise control (ACC)/dynamic rear proportion (DRP)/engine drag control (EDC)/tire pressure monitor (TPM)/variable effort steering (VES)/Vehicle Stability Enhancement System (VSES) are disabled.
2. Traction Control System (TCS) is degraded.
3. The ABS/TCS indicators turn ON.
4. The red BRAKE Warning indicator turns ON.

The driver information center (DIC) displays the following

1. Service ABS
2. Service Traction System
3. Service Stabilitrak
4. Service Radar Cruise

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

When a EBCM has been replaced, but has not been programmed, DTC C0550 will set.

Possible causes of this DTC

1. Open ground at the EBCM
2. Internal malfunction in the EBCM

The number below refer to the step number on the diagnostic table.

1. 2: Tests for a proper ground to the EBCM.

DTC C0550

When the electronic brake control module (EBCM) is replaced, software and calibrations are flash programmed into the EBCM. The EBCM receives the vehicle powertrain options information from the powertrain control module (PCM) in order for the EBCM to automatically calibrate to the vehicle.

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

One or more of the following conditions are present

1. The incorrect EBCM is installed on the vehicle.
2. The incorrect software or calibrations have been flash programmed into the EBCM.

If equipped, the following actions occur

1. The EDC/TCS are disabled.
2. The TCS indicator turns ON.

The DIC displays the Service Traction System message.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

If the DTC was set after EBCM replacement, verify that the replacement EBCM and software are correct for the vehicle.

DTC C0551

The electronic brake control module (EBCM) disables the traction control when other electronic control modules set DTCs for components that effect the operation of the traction control system.

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

The PCM or BCM diagnoses a condition preventing the engine control portion of the traction control function and sends a serial data message to the EBCM indicating that torque reduction is not allowed. The PCM or BCM will typically set a DTC and the EBCM will set this DTC.

1. The EBCM disables the TCS until the DTC becomes a history DTC.
2. The Traction Off indicator turns ON.
3. The ABS remains functional.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

This DTC is for information only. As an aid to the technician, this DTC indicates that there are no problems in the ABS/TCS system.

DTC C0561

When the electronic brake control module (EBCM) is replaced, software and calibrations are flash programmed into the EBCM. The EBCM receives the vehicle identification number information from the vehicle in order for the EBCM to automatically calibrate to the vehicle.

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

One or more of the following conditions are present

1. The incorrect EBCM is installed on the vehicle.
2. The incorrect software or calibrations have been flash programmed into the EBCM.

If equipped, the following actions occur

1. The EDC/TCS are disabled.
2. The TCS indicator turns ON.

The DIC displays the Service Traction System message.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

If the DTC was set after EBCM replacement, verify that the replacement EBCM and software are correct for the vehicle.

DTC C0565

The electronic brake control module (EBCM) monitors the voltage level of the EBCMs case. If the voltage level is too high, damage may result in the system. When the EBCM detects a high voltage condition, the EBCM turns OFF the system relay which removes battery voltage from the solenoid valves and pump motor.

The ignition is ON.

The case voltage is greater than 2 volts for 0.1 seconds.

If equipped, the following actions occur

1. The EBCM disables the ABS/ACC/VSES for the duration of the ignition cycle.
2. The DRP and TCS are degraded.
3. The ABS indicator turns ON.
4. The Traction Control indicator turns ON.
5. The DIC displays the Service Stability System message.
6. The red Brake warning indicator turns ON.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

Possible causes of this DTC are the following conditions

1. Internal short in the pump motor.
2. External battery supply shorted to case.
3. Internal EBCM battery supply shorted to case.

The pump motor is integral to the BPMV. The pump motor is not serviceable.

The number below refers to the step number on the diagnostic table.

1. 3: Tests the ability of the EBCM to control the pump motor. If the test lamp illuminates, the pump motor circuit within the EBCM is good.

DTC C0820

The electronic brake control module (EBCM) supplies voltage to the brake pressure sensor, steering angle sensor, and yaw rate/lateral accelerometer sensor. This voltage is monitored by the EBCM for an over or under voltage condition.

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

One of the follow conditions exists for 0.1 seconds

1. The sensor supply voltage is greater than 5.2 volts.
2. The sensor supply voltage is less than 4.8 volts.

1. The EBCM disables the VSES for the duration of the ignition cycle.
2. ACC braking function disabled.
3. TCS is degraded.
4. The Traction Control and Active Handling indicator turns ON.
5. The DIC displays the Service Active Handling message.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

The following conditions can cause this concern

1. The sensor supply circuit is open, shorted to ground, or shorted to battery.
2. Internal sensor malfunction.
3. Internal EBCM malfunction.

The numbers below refer to the step numbers on the diagnostic table.

1. 5: Tests for a short at the brake pressure sensor.
2. 6: Tests for a short at the steering wheel position sensor.
3. 7: Tests for a short at the yaw rate/lateral accelerometer sensor.

DTC C0870

The electronic brake control module (EBCM) monitors the voltage level available for system operation. A low voltage condition prevents the system from operating properly.

1. The vehicle speed is greater than 8 km/h (5 mph).
2. The system relay is commanded ON.

One of the following conditions exists for 0.72 seconds

1. During initialization or when the system is inactive, the system voltage is less than 10.8 volts.
2. During the system operation, the system voltage is less than 9.0 volts.

If equipped, the following actions occur

1. The EBCM disables the ABS/ACC/VES/VSES for the duration of the ignition cycle.
2. The ABS indicator turns ON.
3. The traction control indicator turns ON.
4. The DIC displays the Service Stabilitrak and Service ABS messages.
5. DRP and TCS are degraded.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

1. Test the charging system. Refer to «Diagnostic System Check - ABS»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system) .
2. Possible causes of this DTC are the following conditions: A charging system malfunction An excessive battery draw A weak battery A faulty system ground

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Use the scan tool in order to inspect the voltage to the EBCM.
2. 3: Use the scan tool in order to inspect the voltage to the body control module (BCM). A low voltage value in multiple modules indicates a concern in the charging system.
3. 5: Verifies that the condition is still present.

DTC C0899

The electronic brake control module (EBCM) monitors the voltage level available for system operation. If the voltage level is too high, damage may result in the system. When the EBCM detects a high voltage condition, the EBCM turns OFF the system relay which removes battery voltage from the solenoid valves and pump motor.

The vehicle speed is greater than 8 km/h (5 mph).

The system voltage is greater than 17 volts for 0.72 seconds.

If equipped, the following actions occur

1. The EBCM disables the ABS/TCS/VSES for the duration of the ignition cycle.
2. The DRP does not function optimally.
3. The ABS indicator turns ON.
4. The Traction Control and Active Handling indicator turns ON.
5. The DIC displays the following messages: Service ABS Service Traction System Service Active Handling

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The EBCM automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

A possible cause of this DTC is overcharging.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Use the scan tool in order to inspect the voltage to the EBCM.
2. 3: Use the scan tool in order to inspect the voltage to the body control module (BCM). A high voltage value in multiple modules indicates a concern in the charging system.
3. 4: Verifies that the condition is still present.

DTC C0900

The EBCM uses the BPP Sensor to determine if an extended brake travel event has occurred. If an extended brake travel condition exists, the EBCM will provide a 5 volt output via the extended brake travel circuit to the ECM.

1. The ignition is ON.
2. Ignition voltage is greater than 8 volts.

One of the following conditions exist

1. The extended brake travel voltage is less than 0.8 volts when extended brake travel is ON.
2. The extended brake travel voltage is greater than 2.0 volts when extended brake travel is OFF.

All systems remain functional.

1. The condition for the DTC is no longer present and the DTC is cleared with a scan tool.
2. The electronic brake control module (EBCM) automatically clears the history DTC when a current DTC is not detected in 100 consecutive drive cycles.

One of the following may cause this concern

1. An open in the extended brake travel circuit.
2. A short to ground or voltage in the extended brake travel circuit.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: Measure the extended brake travel circuit in order to determine if the extended brake travel signal has a valid voltage.
2. 4: Measure the extended brake travel signal in order to determine if the EBCM is functioning properly.
3. 8: This vehicle is equipped with a ECM which uses an electrically erasable programmable read only memory (EEPROM). When replacing the ECM, the replacement ECM must be programmed.

DTC P1575

Symptoms - Antilock Brake System

1. Perform the «Diagnostic System Check - ABS»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system) before using the Symptom Tables in order to verify that all of the following are true: There are no DTCs set. The control module(s) can communicate via the serial data link.
2. Review the system operation in order to familiarize yourself with the system functions. Refer to «ABS Description and Operation»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system) .

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the antilock brake system. Refer to «Checking Aftermarket Accessories»(/cadillac/cts/i-2002-2007/remont/body-electrical/#wiring-systems-diagnostic-information-and-procedures__checking-aftermarket-accessories) in Wiring Systems.
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Inspect the master cylinder reservoir for the proper brake fluid level.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections in Wiring Systems.

Symptom List

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

1. «ABS Indicator Always On»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system)
2. «ABS Indicator Inoperative»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system)
3. «Traction Control Indicator Always On»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system)
4. «Traction Control Indicator Inoperative»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system)
5. «Traction Off Indicator Inoperative»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system)
6. «Vehicle Stability Enhancement System Inoperative»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system)
7. «Vehicle Stability Enhancement System Unwanted Activation»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system)
8. «Vehicle Stability Enhancement System Excessive Brake Pulsation»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system)

The instrument cluster controls the operation of the ABS indicator. The electronic brake control module (EBCM) reports the desired status of the ABS indicator via serial data messages. The ABS indicator signal circuit is a back-up reporting circuit to the serial data messages. The EBCM supplies ground through the circuit when the ABS is operating properly. When there is a problem with ABS that should turn on the ABS indicator, the EBCM opens the ABS indicator signal circuit. If there is a problem with the ABS serial data messages, the instrument cluster uses the ABS indicator signal to determine if the ABS indicator should be illuminated. Using the serial data messages and back-up circuit, the instrument cluster decides whether to turn on the ABS indicator.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: Use the scan tool to check the normal state of the ABS indicator control circuit.
2. 4: Ensures that the instrument panel cluster (IPC) can operate the ABS indicator.

ABS Indicator Always On

The instrument cluster controls the operation of the ABS indicator. The electronic brake control module (EBCM) reports the desired status of the ABS indicator via serial data messages. The ABS indicator signal circuit is a back-up reporting circuit to the serial data messages. The EBCM supplies ground through the circuit when the ABS is operating properly. When there is a problem with ABS that should turn on the ABS indicator, the EBCM opens the ABS indicator signal circuit. If there is a problem with the ABS serial data messages, the instrument cluster uses the ABS indicator signal to determine if the ABS indicator should be illuminated. Using the serial data messages and back-up circuit, the instrument cluster decides whether to turn on the ABS indicator.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: Use the scan tool to check the normal state of the ABS indicator control circuit.
2. 4: Ensures that the instrument panel cluster (IPC) can operate the ABS indicator.

ABS Indicator Inoperative

The Traction Control indicator is controlled by the instrument cluster (IPC) via serial data messages from the EBCM. The EBCM send a serial data message to the IPC to illuminate the Traction Control indicator when the EBCM has disabled TCS due to a DTC. The Traction Control indicator will also turn ON during the instrument cluster bulb check. When the ignition switch is turned to ON, the Traction Control indicator will turn ON for approximately 3 seconds and then turn OFF.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Use the scan tool to check the normal state of the Traction Control indicator control.
2. 3: Ensures that the instrument cluster can operate the Traction Control indicator.

Traction Control Indicator Always On

The Traction Control indicator is controlled by the instrument cluster (IPC) via serial data messages from the EBCM. The EBCM send a serial data message to the IPC to illuminate the Traction Control indicator when the EBCM has disabled TCS due to a DTC. The Traction Control indicator will also turn ON during the instrument cluster bulb check. When the ignition switch is turned to ON, the Traction Control indicator will turn ON for approximately 3 seconds and then turn OFF.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Use the scan tool to check the normal state of the Traction Control indicator control.
2. 3: Ensures that the instrument cluster can operate the Traction Control indicator.

Traction Control Indicator Inoperative

The Traction Off indicator is controlled by the instrument cluster via serial data messages from the EBCM. When the RIM sees the traction control switch input grounded through the momentary traction control switch, it sends a serial data message to the EBCM that tells the EBCM that the traction control switch has been pressed. The EBCM then disables traction control and sends a serial data message to the instrument cluster to turn on the Traction Off indicator on the instrument panel. Each time the ignition is cycled from OFF to ON, the traction control system is enabled.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Use the scan tool to check the normal state of the Traction Off indicator control.
2. 3: Ensures that the instrument cluster can operate the Traction Off indicator.

Traction Off Indicator Always On

The Traction Off indicator is controlled by the instrument cluster via serial data messages from the EBCM. When the RIM sees the traction control switch input grounded through the momentary traction control switch, it sends a serial data message to the EBCM that tells the EBCM that the traction control switch has been pressed. The EBCM then disables traction control and sends a serial data message to the instrument cluster to turn on the Traction Off indicator on the instrument panel. Each time the ignition is cycled from OFF to ON, the traction control system is enabled.

The numbers below refer to the step numbers on the diagnostic table.

1. 2: Use the scan tool to check the normal state of the Traction Off control.
2. 3: Ensures that the instrument cluster can operate the Traction Off indicator.

Traction Off Indicator Inoperative

The vehicle stability enhancement system (VSES) is activated by the electronic brake control module (EBCM) calculating the desired yaw rate and comparing it to the actual yaw rate input. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM will attempt to correct the vehicle's yaw motion by applying differential braking to the left or right front wheel.

The numbers below refer to the step numbers on the diagnostic table.

1. 3: Perform the Steering Position Sensor Test in order to verify if the steering wheel position sensor (SWPS) is operating properly.
2. 4: Verify that the Lateral Accelerometer Input parameter is within the valid range.
3. 5: Verify that the Yaw Rate Input parameter is within the valid range.

Vehicle Stability Enhancement System Inoperative

The vehicle stability enhancement system (VSES) is activated by the electronic brake control module (EBCM) calculating the desired yaw rate and comparing it to the actual yaw rate input. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM will attempt to correct the vehicle's yaw motion by applying differential braking to the left or right front wheel.

The number below refers to the step number on the diagnostic table.

1. 6: Perform the Steering Position Sensor Test in order to verify if the steering wheel position sensor (SWPS) is operating properly.

Vehicle Stability Enhancement System Unwanted Activation

The vehicle stability enhancement system (VSES) is activated by the EBCM calculating the desired yaw rate and comparing it to the actual yaw rate input. The desired yaw rate is calculated from measured steering wheel position, vehicle speed, and lateral acceleration. The difference between the desired yaw rate and actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM will attempt to correct the vehicle's yaw motion by applying differential braking to the left or right front wheel.

Vehicle Stability Enhancement System Excessive Brake Pulsation

ABS Automated Bleed Procedure

Note. Refer to Brake Fluid Effects on Paint and Electrical Components Notice in Cautions and Notices.

The ABS Automated Bleed Procedure uses a scan tool to cycle the system solenoid valves and run the pump in order to purge any air from the secondary circuits. These circuits are normally closed off, and are only opened during system initialization at vehicle start up and during ABS operation. The automated bleed procedure opens these secondary circuits and allows any air trapped in these circuits to flow out toward the brake corners.

Performing the Automated Bleed Procedure

1. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
2. Remove all four tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
3. Inspect the brake system for leaks and visual damage. Refer to «Symptoms - Hydraulic Brakes»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__symptoms-hydraulic-brakes) in Hydraulic Brakes. Repair or replace components as needed.
4. Lower the vehicle.
5. Inspect the battery state of charge. Refer to «Battery Inspection/Test»(/cadillac/cts/i-2002-2007/remont/charging-system/#battery-charging-system-and-starting-system) in Engine Electrical.
6. Install a scan tool.
7. Turn the ignition ON, with the engine OFF.
8. With the scan tool, establish communications with the ABS system. Select Special Functions. Select Automated Bleed from the Special Functions menu.
9. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
10. Following the directions given on the scan tool, pressure bleed the base brake system. Refer to «Hydraulic Brake System Bleeding (Manual)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) or «Hydraulic Brake System Bleeding (Pressure)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
11. Follow the scan tool directions until the desired brake pedal height is achieved.
12. If the bleed procedure is aborted, a malfunction exists. Perform the following steps before resuming the bleed procedure: If a DTC is detected, refer to «Diagnostic Trouble Code (DTC) List»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__diagnostic-trouble-code-dtc-list) in Vehicle DTC Information, and diagnose the appropriate DTC. If the brake pedal feels spongy, perform the conventional brake bleed procedure again. Refer to «Hydraulic Brake System Bleeding (Manual)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) or «Hydraulic Brake System Bleeding (Pressure)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
13. When the desired pedal height is achieved, press the brake pedal to inspect for firmness.
14. Lower the vehicle.
15. Remove the scan tool.
16. Install the tire and wheel assemblies. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
17. Inspect the brake fluid level. Refer to «Master Cylinder Reservoir Filling»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-reservoir-filling) in Hydraulic Brakes.
18. Road test the vehicle while inspecting that the pedal remains high and firm.

Removal Procedure

1. Turn OFF the ignition.
2. Thoroughly clean all of the contaminants from and around the EBCM assembly.
3. Disconnect the coolant bypass valve from the radiator and position out of the way. Refer to «Coolant Bypass Valve Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
4. Press the retainer in the EBCM electrical connector (1).
5. Rotate the EBCM connector tab (2) to the unlocked position.
6. Disconnect the EBCM electrical connector (1) from the EBCM (3) and position out of the way.
7. Remove and discard the 2 upper EBCM to brake pressure modulator valve (BPMV) screws (1).
8. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
9. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
10. Remove and discard the 2 lower EBCM to brake pressure modulator valve (BPMV) screws (1).
11. Lower the vehicle.
12. Clean the surface of the EBCM/BPMV assembly.
13. Separate the EBCM (1) from the BPMV (2).

Installation Procedure

1. Clean the seal surface of the BPMV.
2. Install the EBCM (1) to the BPMV (2).
3. Make sure that the internal pump motor connector (3) is installed into the new EBCM (1) prior to EBCM replacement.
4. Install the 2 upper NEW EBCM to BPMV screws.
5. Raise and suitably support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
6. Install the 2 lower NEW EBCM to BPMV screws. Tighten: Tighten the (4) NEW EBCM to BPMV screws in sequence (1-4) to 5 N.m (44 lb in).
7. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
8. Lower the vehicle.
9. Connect the EBCM electrical connector (1) to the EBCM (3).
10. Rotate the EBCM connector tab (2) to the locked position.
11. Connect the coolant bypass valve to the radiator. Refer to «Coolant Bypass Valve Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
12. Use the scan tool in order to clear the DTCs.
13. Perform the auto bleed procedure. Refer to «ABS Automated Bleed Procedure»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__abs-automated-bleed-procedure) .
14. If installing a new EBCM it is necessary to program the EBCM. Refer to «Service Programming System (SPS)»(/cadillac/cts/i-2002-2007/remont/communication-devices/#service-programming-system) in Programming.
15. Perform the ABS Diagnostic System Check. Refer to «Diagnostic System Check - ABS»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system) .
16. Recalibrate the brake pedal position sensor. Refer to «Brake Pedal Position Sensor Replacement»(/cadillac/cts/i-2002-2007/remont/exterior-lights/#lighting-systems-introduction-and-removal-installation) in Lighting.

1. Turn OFF the ignition.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
3. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
4. Thoroughly clean all of the contaminants from and around the EBCM assembly.
5. Press the retainer in the EBCM electrical connector (1).
6. Rotate the EBCM connector tab (2) to the unlocked position.
7. Disconnect the EBCM electrical connector (1) from the EBCM (3) and position out of the way.
8. Remove and discard the EBCM to brake pressure modulator valve (BPMV) screws (1).
9. Clean the surface of the EBCM/BPMV assembly.
10. Separate the EBCM (1) from the BPMV (2).

1. Clean the seal surface of the BPMV.
2. Install the EBCM (1) to the BPMV (2).
3. Make sure that the internal pump motor connector (3) is installed into the new EBCM (1) prior to EBCM replacement.
4. Install the NEW EBCM to BPMV screws. Tighten: Tighten the (4) NEW EBCM to BPMV screws in sequence (1-4) to 5 N.m (44 lb in).
5. Connect the EBCM electrical connector (1) to the EBCM (3).
6. Rotate the EBCM connector tab (2) to the locked position.
7. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
8. Lower the vehicle.
9. Use the scan tool in order to clear the DTCs.
10. Perform the auto bleed procedure. Refer to «ABS Automated Bleed Procedure»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__abs-automated-bleed-procedure) .
11. If installing a new EBCM it is necessary to program the EBCM. Refer to «Service Programming System (SPS)»(/cadillac/cts/i-2002-2007/remont/communication-devices/#service-programming-system) in Programming.
12. Perform the ABS Diagnostic System Check. Refer to «Diagnostic System Check - ABS»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system) .
13. Recalibrate the brake pedal position sensor. Refer to «Brake Pedal Position Sensor Replacement»(/cadillac/cts/i-2002-2007/remont/exterior-lights/#lighting-systems-introduction-and-removal-installation) in Lighting.

Brake Pressure Modulator Valve (BPMV) Replacement (CTS)

1. Turn OFF the ignition.
2. Thoroughly clean all contaminants from around the EBCM.
3. Disconnect the coolant bypass valve from the radiator and position out of the way. Refer to «Coolant Bypass Valve Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
4. Remove the 2 master cylinder brake pipes (3) from the BPMV (1).
5. Remove the 4 wheel brake pipes (2) from the BPMV (1).
6. Clean any brake fluid spillage from the BPMV (1).
7. If equipped with a brake fluid pressure sensor (4), disconnect the electrical connector, from the brake fluid pressure sensor.
8. Rotate the EBCM connector tab (2) up to the unlocked position.
9. Disconnect the EBCM electrical connector (1) from the EBCM (3) and position out of the way.
10. Remove the 2 BPMV bracket nuts (2).
11. Remove the EBCM/BPMV assembly (1) from the BPMV bracket.
12. Remove and discard the 4 EBCM to BPMV screws.
13. Clean the surface of the EBCM/BPMV assembly.
14. Remove the EBCM (1) from the BPMV (2).

1. Clean the seal surface of the BPMV.
2. Install the EBCM (1) to the BPMV (2).
3. Make sure that the internal pump motor connector (3) is installed into the new EBCM (1) prior to EBCM replacement.
4. Install the 4 NEW EBCM to BPMV screws. Tighten: Tighten the (4) NEW EBCM to BPMV screws in sequence (1-4) to 5 N.m (44 lb in).
5. Install the EBCM/BPMV assembly (1) to the BPMV bracket.
6. Install the 2 BPMV bracket nuts (2). Tighten: Tighten the BPMV nuts to 10 N.m (89 lb in).
7. Connect the EBCM electrical connector (1) to the EBCM (3).
8. Rotate the EBCM connector tab (2) to the locked position.
9. Install the 4 wheel brake pipes (2) to the BPMV (1) using the locations recorded during the removal procedure. Tighten: Tighten the wheel brake pipes to 27 N.m (20 lb ft).
10. Install the 2 master cylinder brake pipes (3) to the BPMV (1) using the locations recorded during the removal procedure. Tighten: Tighten the master cylinder brake pipes to 27 N.m (20 lb ft).
11. If equipped with a brake fluid pressure sensor (4), connect the electrical connector.
12. Connect the coolant bypass valve to the radiator. Refer to «Coolant Bypass Valve Replacement»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
13. Fill and bleed the hydraulic brake system. Refer to «Master Cylinder Reservoir Filling»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-reservoir-filling) and «Hydraulic Brake System Bleeding (Manual)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) or «Hydraulic Brake System Bleeding (Pressure)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
14. Perform the Auto Bleed Procedure. Refer to «ABS Automated Bleed Procedure»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__abs-automated-bleed-procedure) .
15. Perform the ABS Diagnostic System Check. Refer to «Diagnostic System Check - ABS»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system) .

Brake Pressure Modulator Valve (BPMV) Replacement (CTS-V)

1. Turn OFF the ignition.
2. Remove the right front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
3. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
4. Remove the right front wheel house liner. Refer to «Wheelhouse Liner Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
5. Thoroughly clean all contaminants from around the EBCM.
6. Remove the upper radiator support bracket. Refer to «Radiator Support Bracket Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Support Bracket Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Support Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
7. Carefully lift the right side of the radiator up and move forward to access the front brake pipe of (BPMV).
8. Carefully remove the brake pressure switch electrical connector and position out of the way.
9. Remove the 2 master cylinder brake pipes (3) from the BPMV (1).
10. Carefully remove the front wheel brake pipe from the (BPMV).
11. Carefully move the right side of the radiator froward into the insulator in the frame.
12. Remove the remaining wheel brake pipes (2) from the BPMV (1).
13. Clean any brake fluid spillage from the BPMV (1).
14. If equipped with a brake fluid pressure sensor (4), disconnect the electrical connector, from the brake fluid pressure sensor.
15. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
16. Remove the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
17. Rotate the EBCM connector tab (2) up to the unlocked position.
18. Disconnect the EBCM electrical connector (1) from the EBCM (3) and position out of the way.
19. Remove the 6 BPMV mounting bolts from under the mounting bracket.
20. Remove the EBCM/BPMV assembly from the BPMV bracket.
21. Remove and discard the 4 EBCM to BPMV screws.
22. Clean the surface of the EBCM/BPMV assembly.
23. Remove the EBCM (1) from the BPMV (2).

1. Clean the seal surface of the BPMV.
2. Install the EBCM (1) to the BPMV (2).
3. Make sure that the internal pump motor connector (3) is installed into the new EBCM (1) prior to EBCM replacement.
4. Install the 4 NEW EBCM to BPMV screws. Tighten: Tighten the (4) NEW EBCM to BPMV screws in sequence (1-4) to 5 N.m (44 lb in).
5. Install the EBCM/BPMV assembly to the BPMV bracket.
6. Install the 6 BPMV mounting bolts. Tighten: Tighten the BPMV nuts to 10 N.m (89 lb in).
7. Connect the EBCM electrical connector (1) to the EBCM (3).
8. Rotate the EBCM connector tab (2) to the locked position.
9. Install the front air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
10. Lower the vehicle.
11. Install the 3 wheel brake pipes (2) to the BPMV (1) using the locations recorded during the removal procedure. Tighten: Tighten the back 3 wheel brake pipes to 27 N.m (20 lb ft).
12. Carefully lift the right side of the radiator up and move rearward to access the front brake pipe of (BPMV).
13. Carefully install the front brake pipe from the (BPMV). Tighten: Tighten the wheel brake pipe to 27 N.m (20 lb ft).
14. Install the 2 master cylinder brake pipes (3) to the BPMV (1) using the locations recorded during the removal procedure. Tighten: Tighten the master cylinder brake pipes to 27 N.m (20 lb ft).
15. Carefully connect the brake pressure switch electrical connector.
16. Carefully move the right side of the radiator rearward into the insulator in the frame.
17. Install the upper radiator support bracket. Refer to «Radiator Support Bracket Replacement (LA3, LY9)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Support Bracket Replacement (LY7)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) or «Radiator Support Bracket Replacement (LS6)»(/cadillac/cts/i-2002-2007/remont/cooling-fan/#engine-cooling-system) in Engine Cooling.
18. If equipped with a brake fluid pressure sensor (4), connect the electrical connector.
19. Install the right front wheel house liner. Refer to «Wheelhouse Liner Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
20. Install the air deflector. Refer to «Air Deflector Replacement - Front»(/cadillac/cts/i-2002-2007/remont/exterior-body-panels/#body-front-end) in Body Front End.
21. Install the right front tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/cadillac/cts/i-2002-2007/remont/wheel-tire-system/#tires-and-wheels) in Tires and Wheels.
22. Fill and bleed the hydraulic brake system. Refer to «Master Cylinder Reservoir Filling»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-reservoir-filling) and «Hydraulic Brake System Bleeding (Manual)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) or «Hydraulic Brake System Bleeding (Pressure)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
23. Perform the Auto Bleed Procedure. Refer to «ABS Automated Bleed Procedure»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__abs-automated-bleed-procedure) .
24. Perform the ABS Diagnostic System Check. Refer to «Diagnostic System Check - ABS»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system) .

1. Thoroughly clean all contaminants from around the EBCM.
2. Disconnect the brake fluid pressure sensor electrical connector (3) from the brake fluid pressure sensor (2).
3. Remove the brake fluid pressure sensor (2) from the electronic brake control module (EBCM) (1).

1. Install the brake fluid pressure sensor (2) to the EBCM (1). Tighten: Tighten the brake fluid pressure sensor to 17 N.m (13 lb ft).
2. Connect the brake fluid pressure sensor electrical connector (3) to the brake fluid pressure sensor (2).
3. Fill and bleed the hydraulic brake system. Refer to «Master Cylinder Reservoir Filling»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system__master-cylinder-reservoir-filling) and «Hydraulic Brake System Bleeding (Manual)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) or «Hydraulic Brake System Bleeding (Pressure)»(/cadillac/cts/i-2002-2007/remont/mechanical-hydraulic/#hydraulic-brake-system) in Hydraulic Brakes.
4. Perform the Auto Bleed Procedure. Refer to «ABS Automated Bleed Procedure»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__abs-automated-bleed-procedure) .
5. Perform the ABS Diagnostic System Check. Refer to «Diagnostic System Check - ABS»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system) .

1. Turn OFF the ignition.
2. Remove the brake pressure modulator valve (BPMV) from the frame. Refer to «Brake Pressure Modulator Valve (BPMV) Replacement (CTS)»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__brake-pressure-modulator-valve-bpmv-replacement) or «Brake Pressure Modulator Valve (BPMV) Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__brake-pressure-modulator-valve-bpmv-replacement) .
3. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/cadillac/cts/i-2002-2007/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) in General Information.
4. Remove the 4 BPMV bracket to frame mounting bolts (2).
5. Remove the BPMV mounting bracket (1) from the frame.

1. Install the BPMV mounting bracket (1) to the frame.
2. Install the 4 BPMV mounting nuts (2). Tighten: Tighten the BPMV bracket mounting nuts to 12N.m (106 lb in).
3. Install the brake pressure modulator valve to the BPMV bracket. Refer to «Brake Pressure Modulator Valve (BPMV) Replacement (CTS)»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__brake-pressure-modulator-valve-bpmv-replacement) or «Brake Pressure Modulator Valve (BPMV) Replacement (CTS-V)»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system__brake-pressure-modulator-valve-bpmv-replacement) .

1. Turn OFF the ignition.
2. Remove the I/P compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages and Console.
3. Carefully depress the retainers on the traction control switch (2).
4. Remove the traction control switch (2) from the I/P compartment.
5. Remove the electrical connector (1) from the traction control switch (2).

1. Connect the electrical connector (1) to the traction control switch (2).
2. Carefully push the traction control switch into the I/P compartment until it is locked into place.
3. Install the I/P compartment. Refer to «Compartment Replacement - Instrument Panel (I/P)»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages and Console.

1. Turn OFF the ignition.
2. Remove the center console. Refer to «Console Replacement - Front Floor»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
3. Disconnect the yaw rate sensor/lateral accelerometer sensor electrical connector.
4. Remove the yaw rate sensor/lateral accelerometer sensor mounting nuts (1) from the mounting studs.
5. Remove the yaw rate sensor/lateral accelerometer sensor from the vehicle.

1. Connect the yaw rate sensor/lateral accelerometer sensor electrical connector.
2. Install the yaw rate sensor/lateral accelerometer sensor (2) to the vehicle.
3. Install the yaw rate sensor/lateral accelerometer sensor mounting nuts (1) to the mounting studs. Tighten: Tighten the yaw rate sensor/lateral accelerometer sensor mounting nuts to 9 N.m (80 lb in).
4. Install the center console to the vehicle. Refer to «Console Replacement - Front Floor»(/cadillac/cts/i-2002-2007/remont/gauges-instrument-panels/#instrument-panel-system-displays-gauges-and-console) in Instrument Panel, Gages, and Console.
5. Perform the ABS Diagnostic System Check. Refer to «Diagnostic System Check - ABS»(/cadillac/cts/i-2002-2007/remont/anti-locktraction-control/#antilock-brake-system-traction-control-system-stability-control-system) .

Scheme 12

Scheme 13

This vehicle is equipped with the DBC7.2 antilock braking system.

The vehicle is equipped with the following braking systems

1. Antilock Brake System (ABS)
2. Engine Drag Control (EDC)
3. Dynamic Rear Proportioning (DRP)
4. Traction Control System (TCS)
5. Vehicle Stability Enhancement System (VSES) (w/JL4)

The following components are involved in the operation of the above systems

1. Electronic Brake Control Module (EBCM) - The EBCM controls the system functions and detects failures. The EBCM contains the following components: System Relay - The system relay is energized when the ignition is ON and no ABS DTCs are present. It supplies battery positive voltage to the solenoid valves and pump motor. Vent Tube - The vent tube, located in the EBCM connector, is an opening to the internal cavity of the EBCM. It allows ventilation of the EBCM internals.
2. Brake Pressure Modulator Valve (BPMV) - The BPMV contains the hydraulic valves and pump motor that are controlled electrically by the EBCM. The BPMV uses a 4 circuit configuration with a diagonal split. The BPMV directs fluid from the reservoir of the master cylinder to the left front and right rear wheels and fluid from the other reservoir to the right front and left rear wheels. The diagonal circuits are hydraulically isolated so that a leak or malfunction in one circuit will allow continued braking ability on the other. IMPORTANT: There is a rubber isolator located under the BPMV and on the mounting studs. The rubber isolators protect the BPMV and the EBCM from vehicle vibrations. The BPMV contains the following components: Pump Motor Inlet Valves (one per wheel) Outlet Valves (one per wheel) Master Cylinder Isolation Valves (one per drive wheel) Prime Valves (one per drive wheel)
3. Wheel Speed Sensors (WSS) - As the wheel spins, the wheel speed sensor produces an AC signal. The EBCM uses this AC signal to calculate wheel speed. The wheel speed sensors are replaceable only as part of the wheel hub and bearing assemblies.
4. Traction Control Switch - The TCS is manually disabled or enabled using the traction control switch.
5. Stoplamp Switch - The EBCM uses the stoplamp switch as an indication that the brake pedal is applied.
6. Lateral Accelerometer Sensor (w/JL4) - The EBCM uses the lateral accelerometer sensor as an indication of the lateral acceleration of the vehicle.
7. Yaw Rate Sensor (w/JL4) - The EBCM uses the yaw rate sensor as an indication of the yaw rate of the vehicle.
8. Steering Wheel Position Sensor (SWPS) (w/JL4) - The EBCM uses the SWPS as an indication of the position and rotation of the steering wheel.

Initialization Sequence

The EBCM performs 1 initialization test each ignition cycle. The initialization of the EBCM occurs when 1 set of the following conditions occur

Both of the following conditions occur

1. The EBCM detects that there is a minimum of 500 RPM from the ECM via a serial data message.
2. The stop lamp switch is not applied.

OR

Both of the following conditions occur

1. The vehicle speed is greater than 16 km/h (10 mph).
2. The stop lamp switch is applied.

The initialization sequence may also be commanded with a scan tool.

The initialization sequence cycles each solenoid valve and the pump motor, as well as the necessary relays, for approximately 1.5 seconds to check component operation. The EBCM sets a DTC if any error is detected. The initialization sequence may be heard and felt while it is taking place, and is considered part of normal system operation.

The EBCM defines a drive cycle as the completion of the initialization sequence.

When wheel slip is detected during a brake application, the ABS enters antilock mode. During antilock braking, hydraulic pressure in the individual wheel circuits is controlled to prevent any wheel from slipping. A separate hydraulic line and specific solenoid valves are provided for each wheel. The ABS can decrease, hold, or increase hydraulic pressure to each wheel brake. The ABS cannot, however, increase hydraulic pressure above the amount which is transmitted by the master cylinder during braking.

During antilock braking, a series of rapid pulsations is felt in the brake pedal. These pulsations are caused by the rapid changes in position of the individual solenoid valves as the EBCM responds to wheel speed sensor inputs and attempts to prevent wheel slip. These pedal pulsations are present only during antilock braking and stop when normal braking is resumed or when the vehicle comes to a stop. A ticking or popping noise may also be heard as the solenoid valves cycle rapidly. During antilock braking on dry pavement, intermittent chirping noises may be heard as the tires approach slipping. These noises and pedal pulsations are considered normal during antilock operation.

Vehicles equipped with ABS may be stopped by applying normal force to the brake pedal. Brake pedal operation during normal braking is no different than that of previous non-ABS systems. Maintaining a constant force on the brake pedal provides the shortest stopping distance while maintaining vehicle stability.

Pressure Hold

The EBCM closes the inlet valve and keeps the outlet valve closed in order to isolate the system when wheel slip occurs. This holds the pressure steady on the brake so that the hydraulic pressure does not increase or decrease.

Pressure Decrease

The EBCM decreases the pressure to individual wheels during a deceleration when wheel slip occurs. The inlet valve is closed and the outlet valve is opened. The excess fluid is stored in the accumulator until the return pump can return the fluid to the master cylinder.

Pressure Increase

The EBCM increases the pressure to individual wheels during a deceleration in order to reduce the speed of the wheel. The inlet valve is opened and the outlet valve is closed. The increased pressure is delivered from the master cylinder.

Engine Drag Control (EDC)

When the driver releases the throttle, and the drag from the engine overcomes the frictional force between the tire and the road, EDC becomes active.

The EBCM sends a torque request signal to the ECM, which increases the torque at the wheels. This stabilizes the wheels by reducing the slip at the driven wheels.

When EDC is active, the driven wheels are controlled to a target below the non-driven wheels.

Dynamic Rear Proportioning (DRP)

The dynamic rear proportioning (DRP) is a control system that replaces the hydraulic proportioning function of the mechanical proportioning valve in the base brake system. The DRP control system is part of the operation software in the EBCM. The DRP uses active control with existing ABS in order to regulate the vehicle's rear brake pressure.

The red brake warning indicator is illuminated when the dynamic rear proportioning function is disabled.

Traction Control System (TCS) (NW9)

When drive wheel slip is noted while the brake is not applied, the EBCM will enter traction control mode.

First, the EBCM requests the ECM to reduce the amount of torque to the drive wheels via the requested torque signal circuit. The ECM reduces torque to the drive wheels by retarding spark timing and turning off fuel injectors. The ECM reports the amount torque delivered to the drive wheels via the delivered torque signal circuit.

If the engine torque reduction does not eliminate drive wheel slip, the EBCM will actively apply the drive wheel brakes. During traction control braking, hydraulic pressure in each drive wheel circuit is controlled to prevent the drive wheels from slipping. The master cylinder isolation valve closes in order to isolate the master cylinder from the rest of the hydraulic system. The prime valve then opens in order to allow the pump to accumulate brake fluid in order to build hydraulic pressure for braking. The drive wheel inlet and outlet solenoid valves then open and close in order to perform the following functions

1. Pressure hold
2. Pressure increase
3. Pressure decrease

ABS Indicator

The IPC illuminates the ABS indicator when the following occurs

1. The electronic brake control module (EBCM) detects a malfunction with the antilock brake system. The IPC receives a class 2 message from the EBCM requesting illumination.
2. The IPC performs the displays test at the start of each ignition cycle. The indicator illuminates for approximately 5 seconds.
3. The IPC detects a loss of class 2 communications with the EBCM.

TRAC OFF

The IPC illuminates the TRAC OFF indicator when the following occurs

1. The electronic brake control module (EBCM) inhibits the traction control system due to a malfunction in the traction control system. The IPC receives a class 2 message from the EBCM requesting illumination.
2. The rear integration module (RIM) detects that the traction control switch has been pressed (signal circuit is low). The RIM sends a class 2 message to the EBCM in order to disable traction control. The IPC receives a class 2 message from the EBCM requesting illumination. The RIM sends a class 2 message to the radio in order to activate an audible warning.

Vehicle Stability Enhancement System (VSES)

The vehicle stability enhancement system (VSES) adds an additional level of vehicle control to the EBCM.

Yaw rate is the rate of rotation about the vehicle's vertical axis. The VSES is activated when the EBCM determines that the desired yaw rate does not match the actual yaw rate as measured by the yaw rate sensor.

The desired yaw rate is calculated from the following parameters

1. The position of the steering wheel
2. The speed of the vehicle
3. The lateral, or sideways acceleration of the vehicle

The difference between the desired yaw rate and the actual yaw rate is the yaw rate error, which is a measurement of oversteer or understeer. If the yaw rate error becomes too large, the EBCM attempts to correct the vehicle's yaw motion by applying differential braking to the appropriate wheel. The amount of differential braking applied to the left or right front wheel is based on both the yaw rate error and side slip rate error.

The VSES activations generally occur during aggressive driving, in turns or on bumpy roads without much use of the accelerator pedal. When braking during VSES activation, the pedal pulsations feel different than the ABS pedal pulsations. The brake pedal pulsates at a higher frequency during VSES activation.

Special Tools

Special Tools Illustration Tool Number/ Description J 39700 Universal Pinout Box J 39700-300 Cable Adapter

See also:
• Scan Tool Does Not Power Up
• Diagnostic Trouble Code (DTC) List
• Diagnostic Trouble Code (DTC) List
• Instrument Panel, Gages, and Console Connector End Views
• Circuit Testing
• Wiring Repairs
• Testing for Intermittent Conditions and Poor Connections
• Connector Repairs
• Instrument Panel Cluster (IPC) Replacement
• Lifting and Jacking the Vehicle
• Wheel Bearing/Hub Replacement - Front
• Wheel Bearing/Hub Replacement - Rear
• Battery Negative Cable Disconnect/Connect Procedure
• Brake Pedal Position Sensor Replacement
• Engine Controls Connector End Views
• Engine Controls Connector End Views
• Engine Control Module (ECM) Replacement
• Engine Control Module (ECM) Replacement
• Diagnostic System Check - Engine Controls
• Engine Control Module (ECM) Connector End Views
• Engine Control Module (ECM) Connector End Views
• Steering Wheel Position Sensor or Steering Shaft Lower Bearing Replacement
• Service Programming System (SPS)
• Powertrain Control Module (PCM) Connector End Views
• Powertrain Control Module (PCM) Replacement
• Checking Aftermarket Accessories
• Body Control System Connector End Views
• Measuring Wheel Alignment
• Power Steering Gear Replacement (LHD)
• Power Steering Gear Replacement (RHD)
• Brake Fluid Irritant Caution
• Brake Fluid Effects on Paint and Electrical Components Notice
• Hydraulic Brake System Bleeding (Manual)
• Tire and Wheel Removal and Installation
• Symptoms - Hydraulic Brakes
• Master Cylinder Reservoir Filling
• Coolant Bypass Valve Replacement
• Air Deflector Replacement - Front
• Fastener Notice
• Brake Dust Caution
• Diagnostic System Check - ABS
• Symptoms - Antilock Brake System
• Diagnostic Trouble Code (DTC) List
• ABS Automated Bleed Procedure
• ABS Connector End Views
• Brake Pressure Modulator Valve (BPMV) Replacement (CTS)
• Scan Tool Output Controls
• Diagnostic Test Drive