SPECIFICATIONS
| Description | Nm |
|---|---|
| Speed control sensor locknut | 10 |
| Speed control module retaining bolt | 10 |
| Speed control sensor bolts | 10 |
TORQUE SPECIFICATIONS
For additional information, refer to: Speed Control information.
OVERVIEW
For information on the description and operation of the speed control systems, refer to Speed Control .
INSPECTION AND VERIFICATION
- Verify the customer concern.
- Visually inspect for obvious mechanical or electrical faults. Visual Inspection Mechanical Electrical Speed control sensor condition and installation Speed control switches Forward alert switch Brake switches Tire size and condition Fuses Speed control sensor Speed control switches Forward alert switch Brake switches Adaptive speed control module Engine control module (ECM) ABS control module Controller area network (CAN) circuits
- If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before proceeding to the next step.
- Use the approved diagnostic system or a scan tool to retrieve any diagnostic trouble codes (DTCs) before moving onto the DTC index. Because the DTCs are stored in more than one module, a complete vehicle read is recommended Make sure that all DTCs are cleared following rectification.
FORWARD LOOKING SENSOR
The correct function of the system depends on the operation of the Forward Looking sensor, this requires correct alignment and an unobstructed field of view.
Customer complaints of poor system performance, late vehicle detection, late system braking, heavier than expected braking when gaining on the vehicle in front or system is detecting vehicles in adjacent lanes, may be due to the sensor pointing up or down (it should be set to level).
Check that there are no obstructions to the sensor
Check for signs of damage to the front bumper/sensor mounting area that could indicate that the sensor has been disturbed.
Check the sensor vertical alignment. For detailed instructions on sensor adjustment, refer to Speed Control Sensor Adjustment in the service information. If the sensor is adjusted up or down then carry out the diagnostic service alignment procedure using the approved diagnostic system.
DTC INDEX
Note. Generic scan tools may not read the codes listed, or may read only 5-digit codes. Match the 5 digits from the scan tool to the first 5 digits of the 7-digit code listed to identify the fault (the last 2 digits give extra information read by the manufacturer-approved diagnostic system).
| DTC | Description | Possible causes | Actions |
|---|---|---|---|
| C1A0041 | Control module | Cruise control module power supply circuit voltage out of range General checksum failure (module internal failure) | A momentary low voltage occurred, check vehicle battery and charging circuit. Refer to the relevant service information. Refer to the electrical guides and check the power supply circuits to the module. Clear the DTC and retest. Refer to the warranty policy and procedures manual if a module is suspect. |
| C1A6511 | Front Alert Switch Circuit | Switch stuck Switch circuit: short circuit to ground | Check the forward alert switch and circuits. Refer to the electrical guides. |
| C1A6515 | Front Alert Switch Circuit | Switch circuit: short circuit to power Switch circuit: high resistance | Check the forward alert switch and circuits. Refer to the electrical guides. |
| C1A6611 | Front Alert LED Circuit | LED circuit: short circuit to ground | Check the forward alert LED and circuits. Refer to the electrical guides. |
| C1A6615 | Front Alert LED Circuit | LED circuit: short circuit to power LED circuit: high resistance | Check the forward alert LED and circuits. Refer to the electrical guides. |
| C1A6754 | Forward Looking Sensor | Missing calibration | Calibrate the sensor using the approved diagnostic system. |
| C1A6787 | Forward Looking Sensor | Missing message | Check the speed control sensor and circuits. Refer to the electrical guides. |
| C1A6796 | Forward Looking Sensor | Component internal failure | Check the speed control sensor and circuits. Refer to the electrical guides. |
| C1A6797 | Forward Looking Sensor | Sensor obstructed or blocked | Check and clear any obstructions from the sensor, clear the DTC and retest. |
| C1A6798 | Forward Looking Sensor | Sensor over-temperature | Clear the DTC, allow vehicle to cool down and retest. Consider the atmospheric conditions before condemning a module. |
| P050429 | Brake Switch A/B Correlation | Brake switch malfunction - sub-processor | Check for ABS DTCs, check the brake switch and circuits (refer to the electrical guides). Clear the DTCs and test for normal operation. |
| P050464 | Brake Switch A/B Correlation | Brake switch malfunction | Check for ABS DTCs, check the brake switch and circuits (refer to the electrical guides). Clear the DTCs and test for normal operation. |
| P052500 | Cruise Control Servo Control Circuit Range/Performance | Internal control module corruption | Check the ECM and speed control modules and circuits. Refer to the electrical guides. Refer to the warranty policy and procedures manual if a module is suspect. |
| P057400 | Cruise Control System - Vehicle Speed Too High | Vehicle speed too high | Check for ABS DTCs. Refer to the relevant service information. |
| P057600 | Cruise Control Input Circuit Low | Speed control switch short circuit to ground Speed control switch high resistance | Refer to the electrical guides and check the cruise control circuit between the ECM and switch. Check the switch operation and renew/renew as necessary. |
| P057700 | Cruise Control Input Circuit High | Speed control switch short circuit to power | Refer to the electrical guides and check the cruise control circuit between the ECM and switch. Check the switch operation and renew/renew as necessary. |
| U007388 | Control Module Communication Bus "A" Off | Bus off | The module setting this code has disabled CAN transmission. Ensure that the latest patch file is installed (available on GTR). Check for other bus off codes. Check the module and circuits. Refer to the electrical guides. Clear all DTCs and a road test the vehicle. If the concern reoccurs contact Dealer Technical Support for further advice. Under no circumstance should any parts be replaced to overcome this issue. |
| U010087 | Lost Communication With ECM/PCM "A" | CAN module status signals not received from the engine/powertrain control module (E/PCM) in the specified time | Refer to the lost communication statement at the start of the Network Communications section of the service information. |
| U010187 | Lost Communication with TCM | CAN module status signals not received from the transmission control module TCM in the specified time | Refer to the Network Communications service information. |
| U012287 | Lost Communication With Vehicle Dynamics Control Module | CAN module status signals not received from the VDM in the specified time | Refer to the Network Communications service information. |
| U015587 | Lost Communication With Instrument Panel Cluster (IPC) Control Module | CAN Link transfer case control module/instrument cluster missing message CAN bus fault IPC disconnected IPC not configured IPC failure Harness/connector issue | Check the control module installation/configuration. Refer to the lost communication statement at the start of the Network Communications service information. |
| U023500 | Lost Communication With Cruise Control Front Distance Range Sensor | Lost communication Fault status transmitted | Check for other CAN DTCs or apparently unrelated customer complaints. Carry out a complete vehicle DTC read. Check the CAN and module power and ground circuits. Refer to the electrical guides. Repair/renew as necessary. Clear the DTCs and test for normal operation. |
| U030055 | Internal Control Module Software Incompatibility | Software incompatibility Not configured | Configure the module using the approved diagnostic system. |
| U1A0088 | Private Communication Network | Bus off | The module setting this code has disabled CAN transmission. Ensure that the latest patch file is installed (available on GTR). Check for other bus off codes. Check the module and circuits. Refer to the electrical guides. Clear all DTCs and a road test the vehicle. If the concern reoccurs contact Dealer Technical Support for further advice. Under no circumstance should any parts be replaced to overcome this issue. |
| U1A1449 | CAN Initialisation Failure | Internal electronic failure | Check the power and ground circuits to the component. Refer to the electrical guides. Configure the module(s) using the approved diagnostic system. Clear the DTC and retest. If the problem persists, renew the control module. Refer to the warranty policy and procedures manual if a module is suspect. |
SPEED CONTROL SENSOR ADJUSTMENT
Special Tool(s)
Speed control aligner 310-148
Note. Special tool 310-148 is graduated in 0.5 degree increments.
Note. This procedure details how to adjust the speed control sensor vertically. There is no horizontal adjustment required.
Scheme 96
- Remove the front bumper cover. For additional information, refer to: «Front Bumper Cover»(/land-rover/range-rover-sport/i-2005-2009/remont/exterior-body-panels/#bumpers) information.
- Set the air suspension ride height to the STANDARD setting.
- Using the special tool, check the speed sensor is level, (+/- 0.5 degree).
- Using the special tool, set the speed control sensor. Rotate the vertical adjuster.
- Install the front bumper cover. For additional information, refer to: «Front Bumper Cover»(/land-rover/range-rover-sport/i-2005-2009/remont/exterior-body-panels/#bumpers) information.
Scheme 97
- Disconnect the battery ground cable. For additional information, refer to: «Specifications»(/land-rover/range-rover-sport/i-2005-2009/remont/charging-system/#battery-and-charging-system-general-information__specifications) information.
- Remove the Dynamic Response module. For additional information, refer to: «Dynamic Response Module»(/land-rover/range-rover-sport/i-2005-2009/remont/suspension-control-systems/#ride-and-handling-optimization) information.
- Remove the speed control module. Loosen the bolt. Release and disconnect the electrical connector.
INSTALLATION
- Install the speed control module. Connect and secure the electrical connector. Tighten the bolt to 10 Nm (7 lb.ft).
- Install the Dynamic Response module. For additional information, refer to: «Dynamic Response Module»(/land-rover/range-rover-sport/i-2005-2009/remont/suspension-control-systems/#ride-and-handling-optimization) information.
- Connect the battery ground cable. For additional information, refer to: «Specifications»(/land-rover/range-rover-sport/i-2005-2009/remont/charging-system/#battery-and-charging-system-general-information__specifications) information.
- Program a new control module using T4.
Scheme 98
Scheme 99
- Disconnect the battery ground cable. For additional information, refer to: «Specifications»(/land-rover/range-rover-sport/i-2005-2009/remont/charging-system/#battery-and-charging-system-general-information__specifications) information.
- Remove the front bumper cover. For additional information, refer to: «Front Bumper Cover»(/land-rover/range-rover-sport/i-2005-2009/remont/exterior-body-panels/#bumpers) information.
- Remove the LH bumper support bracket. Remove the 3 Torx screws. Remove the screw.
- Remove the speed control sensor. Remove the 2 bolts. Remove the nut. Release and disconnect the electrical connector.
- Install the speed control sensor. Tighten the nuts and bolts to 10 Nm (7 lb.ft). Connect and secure the electrical connector.
- Install the bumper support bracket. Tighten the screws.
- Connect the battery ground cable. For additional information, refer to: «Specifications»(/land-rover/range-rover-sport/i-2005-2009/remont/charging-system/#battery-and-charging-system-general-information__specifications) information.
- Adjust the speed control sensor. For additional information, refer to: «Speed Control Sensor Adjustment»(/land-rover/range-rover-sport/i-2005-2009/remont/fuel-system/#speed-control-v8-sc-42l-petrol__speed-control-sensor-adjustment) .
- Install the front bumper cover. For additional information, refer to: «Front Bumper Cover»(/land-rover/range-rover-sport/i-2005-2009/remont/exterior-body-panels/#bumpers) information.
- Using T4, configure a new speed control sensor.