Steering System: Overview — Ford Fiesta Mk6 (2008-2013)

Description

During normal operation the PSCM continually monitors and adjusts the steering efforts based on torque sensor inputs to enhance the steering feel. Adjustments are made based on the torque sensor inputs to reduce the effect of pull or drift that may be experienced when driving on roads with a high degree of camber or induced by outside influences. If the level of compensation required to keep the vehicle driving straight ahead exceeds a predetermined level a DTC will be set.

DTC C100C:00 (Steering Tracking: No Sub Type Information) - If the torque required to hold the steering wheel in the straight ahead position exceeds a predetermined value, DTC C100C:00 sets in the PSCM.

While the ignition is ON and the voltage supply to the PSCM is above 10 volts, the PSCM monitors the steering sensor to determine the amount of steering assist required and adjusts steering efforts based on the inputs from the sensor. The steering angle value is transmitted from the PSCM to other modules over the (HS-CAN).

DTC C1B00:2F (Steering Angle Sensor: Signal Erratic) - This DTC sets if the steering angle sensor signal is calculated to be outside the expected range.
DTC C1B00:54 (Steering Angle Sensor: Missing Calibration) - If the initial steering angle sensor calibration is not carried out, DTC C1B00:54 sets in the PSCM.
DTC C1B00:61 (Steering Angle Sensor: Signal Calculation Failure) - If the EPAS motor speed does not match the required speed for the current steering input, this DTC sets.
DTC C1B00:62 (Steering Angle Sensor: Signal Compare Failure) - If the signals from the steering angle sensor and the steering shaft angle sensor within the EPAS column assembly do not match, DTC C1B00:62 sets.
DTC C1B00:95 (Steering Angle Sensor: Incorrect Assembly) - If an invalid steering angle position is detected, DTC C1B00:95 sets in the PSCM.

The PSCM continually monitors the steering shaft torque sensor when the ignition is ON and the voltage supply to the PSCM is above 10 volts.

DTC C200B:2F (Steering Shaft Torque Sensor 1: Signal Erratic) - If the steering shaft torque sensor signal is outside the expected range, then DTC C200B:2F will be set.
DTC C200B:61 (Steering Shaft Torque Sensor 1: Signal Calculation Failure) - If the steering shaft torque sensor signal is not within a certain threshold, then DTC C200B:61 will be set.
DTC C200B:62 (Steering Shaft Torque Sensor 1: Signal Compare Failure) - If a malfunction is detected in the steering shaft torque sensor DTC C200B:62 sets.

The PSCM continually monitors the steering shaft torque sensor when the ignition is ON and the voltage supply to the PSCM is above 10 volts.

DTC C200C:2F (Steering Shaft Torque Sensor 2: Signal Erratic) - If the steering shaft torque sensor signal is outside the expected range, then DTC C200C:2F will be set.

The PSCM continually monitors the motor position angle sensor when the ignition is ON and the voltage supply to the PSCM is above 10 volts.

DTC C200D:49 (Motor Rotation Angle Sensor: Internal Electronic Failure) - If a malfunction is detected in the internal circuit of the EPAS motor position angle sensor, DTC C200D:49 sets.

The PSCM monitors the HS-CAN bus when the ignition has been on for more than 5 seconds, when the voltage to the PSCM is greater than 10 volts and when there are no DTCs present that are inhibiting PSCM operation.

DTC U0001:88 (High Speed CAN Communication Bus: Bus Off) - This DTC will set if the PSCM detects that transmission of HS-CAN bus messages is not acknowledged by other modules for 400 milliseconds or if the HS-CAN bus is deemed to have a communication error for greater than 5 seconds.

DTC U0100:00 (Lost Communication with ECM/PCM A: No Sub Type Information) - This DTC sets if communications between the PSCM and the PCM fail. The PCM sends the vehicle speed/engine speed message to the PSCM. If the message is missing for more than 5 seconds and the PSCM has not set DTC U0001:88, the PSCM sets DTC U0100:00.

DTC U0121:00 (Lost Communication with the Anti-lock Brake System (ABS) Control Module: No Sub Type Information) - This DTC sets when communication between the PSCM and the ABS module fails. The PSCM receives the vehicle speed signal over the HS-CAN from the ABS module. If the PSCM fails to communicate with the ABS module, the PSCM will default to a predetermined vehicle speed value and the steering assistance will be reduced.

Go to PINPOINT TEST M .

Note. The DTC will set in a module that is reporting a communication fault from another module on the data bus. The module that reports the fault is no the problem. Do not install a new OCSM as part of repair.

Refer to MODULE COMMUNICATIONS NETWORK to diagnose the RCM. RCM does not respond to the scan tool.

DTC U0155:00 (Lost Communication with Instrument Panel Cluster (IPC) Control Module: No Sub Type Information) - This DTC will set when communication between the PSCM and the IPC module fails.

The PSCM is self monitoring and will carry out self-tests at specific intervals (initial power up, power down, during normal operation, etc.). Each self-test requires the voltage supply to the PSCM to be between 10 and 16 volts and the vehicle speed to be below 2 km/h (1.24 mph) for the test to take place. If one or more of the self-tests should fail, then the module will set one or more DTCs.

DTC U0300:00 (Internal Control Module Software Incompatibility: No Sub Type Information) - This DTC is set if the PSCM detects a configuration data failure or a mismatch between the stored and retrieved data during self-test.

DTC U0401:00 (Invalid Data Received from ECM/PCM A: No Sub Type Information) - This DTC sets if the PSCM receives invalid or unknown messages from the PCM for ms instead of the valid engine speed, engine state and vehicle speed data messages.

The PSCM continually monitors the steering shaft torque sensor when the ignition is ON and the voltage supply to the PSCM is above 10 volts.

DTC U0415:00 (Invalid Data Received from Anti-Lock Brake System [ABS] Control Module: No Sub Type Information) - This DTC will set if the PSCM receives an invalid or unknown message from the ABS module instead of a valid wheel speed message.

DTC U0452:68 sets when the ABS module receives invalid network data from the RCM. RETRIEVE and REPAIR all non-network DTCs in the RCM. Refer to SUPPLEMENTAL RESTRAINT SYSTEM .

DTC U2011:49 (Motor: Internal Electronic Failure) - If motor voltage output falls below or exceeds a predetermined threshold, DTC U2011:49 will be set.
DTC U2011:61 (Motor: Signal Calculation Failure) - If the integrity of the motor torque estimate or motor velocity signal exceeds or does not meet a calculated value, then DTC U2011:61 will be set.

DTC U2100:00 (Initial Configuration Not Complete: No Sub Type Information) - This DTC will set if the initial PSCM configuration was not carried out or if the configuration fails. The PSCM is configured from as-built data broadcast from the IPC over the HS-CAN. This DTC sets if the PSCM fails to receive the configuration data from the IPC.

The PSCM is configured from the as-built data stored in the IPC and communicated over the HS-CAN. During power up the vehicle information stored in the PSCM is compared against the as-built data stored in the IPC.

DTC U2101:00 (Control Module Configuration Incompatible: No Sub Type Information) - This DTC will set if the vehicle as-built data broadcast by the IPC during power up does not match the information stored in the PSCM. This DTC sets in the PSCM if a new IPC is installed and not configured correctly.

DTC U3000:05 (Control Module: System Programming Failure) - If an internal error is detected in the PSCM hardware, DTC U3000:05 is set.
DTC U3000:41 (Control Module: General Checksum Failure) - If at any time during normal operation the module detects an internal software error with more than 10 volts supplied to the PSCM, DTC U3000:41 sets.
DTC U3000:43 (Control Module: Special Memory Failure) - If at any time during normal operation with more than 10 volts supplied to the PSCM, the PSCM fails to detect the stored DTC memory, DTC U3000:43 is set.
DTC U3000:44 (Control Module: Data Memory Failure) - If the PSCM is unable to detect the stored VIN in the PSCM during start up, DTC U3000:44 sets in the PSCM.
DTC U3000:46 (Control Module: Calibration/Parameter Memory Failure) - If at any time during normal operation with more than 10 volts supplied to the PSCM the module determines that one or more calibration files are missing/corrupt or that the incorrect EPAS column is installed on the vehicle, DTC U3000:46 is set.
DTC U3000:49 (Control Module: Internal Electronic Failure) - If at any time during normal operation with more than 10 volts supplied to the PSCM the module detects a software or internal hardware error, DTC U3000:49 is set.
DTC U3000:61 (Control Module: Signal Calculation Failure) - If the PSCM detects that assist torque calculation is faulty due to a software failure in the module, then DTC U3000:61 sets.
DTC U3000:96 (Control Module: Component Internal Failure) - This DTC sets if a fault causing the EPAS system to enter the system failure mode occurs for three consecutive ignition cycles.

The vehicle identification number is stored to the PSCM from the as-built data communicated by the IPC over the HS-CAN, during the end of line configuration process. At each ignition cycle the IPC reads the stored vehicle identification number in the PSCM and compares it to the vehicle identification number stored in the as-built data.

DTC U3002:62 (Vehicle Identification Number: Signal Compare Failure) - If the PSCM detects a mismatch between the stored and learned vehicle identification numbers in the PSCM, DTC U3002:62 sets in the PSCM.

The PSCM will monitor the voltage supplied by the 12-volt battery and charging system and set the appropriate DTC when necessary.

DTC U3003:16 (Battery Voltage: Circuit Voltage Below Threshold) - If the voltage supply to the PSCM falls below 10 volts with the ignition ON and the engine speed above 500 rpm, DTC U3003:16 sets.
DTC U3003:17 (Battery Voltage: Circuit Voltage Above Threshold) - If the voltage supply to the PSCM exceeds 16 volts for 1 second with the ignition ON, DTC U3003:17 sets.

DTC U3004:49 (Accessory Power Relay: Internal Electronic Failure) - If a fault is detected with the EPAS internal relay, DTC U3004:49 is set.

Normal Operation

The power steering control module (PSCM) monitors various inputs and outputs of the electronic power assist steering (EPAS) system in order to keep the system operating at peak capacity. Information provided by sensors (steering torque, vehicle speed, vehicle travel distance, etc.) are all compared to programmed and learned information. Likewise, outputs like the motor and steering rack (travel) are tested against programmed and learned information.

Note. If a damaged bellows boot(s) was discovered during Inspection and Verification and this pinpoint test DOES NOT lead to the installation of a new EPAS gear or bellows boot(s), then go to PINPOINT TEST K to address the damaged boot(s) before returning the vehicle to the customer.

B1: CHECK FOR PREVIOUSLY SET DTCS Go to «KNOWN CONCERNS»(ref-382378-S05115870442013020600000) . Check for DTCs listed in the section: System Related CMDTCs cleared since initial read. Yes No Go to B2. Go to B2.
B2: INSPECT EPAS GEAR WIRING HARNESS With the vehicle in NEUTRAL, position it on a hoist. Refer to «JACKING & LIFTING»(ref-382368) . Ignition OFF. Is the wire harness undamaged and are all 3 connectors in good condition? Yes No CONNECT all 3 EPAS gear electrical connectors. Go to B3. If the connector(s) are not okay, then REPAIR them. Otherwise, REPAIR the wire harness and whatever caused the damage to the wire harness. Go to B3.
B3: TEST DRIVE TO CHECK FOR RETURNING DTCS NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws. Clear the PSCM DTCs. Cycle the ignition to OFF and then back to RUN. Test drive the vehicle in the following manner: With the engine running/ready, stop the vehicle on an unsealed concrete or asphalt surface (in order to provide adequate friction for a thorough test). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. The test drive is complete. Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions. Yes No INSTALL a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) . The condition to set the DTC is not present at this time. RETURN the vehicle to the customer. For all other PSCM DTCs, REFER to the «DTC Index - Power Steering Control Module (PSCM)»(ref-382378-S04149171252013020600000) .

C1: CHECK PSCM DTCS Review the returned PSCM DTCs. Is DTC U3000:96 present? Yes No INSTALL a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) . Go to C2.
C2: VERIFY PRESENCE OF EPAS GEAR HEAT SHIELD Is the heat shield present and is it installed correctly? Yes No Go to C3. REINSTALL the heat shield or INSTALL a new heat shield as necessary. Go to C3.
C3: TEST DRIVE TO CHECK FOR RETURNING DTCS Clear the PSCM DTCs. Cycle the ignition to OFF and then back to RUN. NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws. Test drive the vehicle in the following manner: With the engine running/ready, stop the vehicle on an unsealed concrete or asphalt surface (in order to provide adequate friction for a thorough test). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. NOTE: The next portion of the test drive will require the vehicle to be driven at highway speeds. NOTE: The test period is a cumulative time of 10 minutes. Stopping, going slower than 72 km/h (45 mph) or faster that 96 km/h (60 mph) will not affect the test as long as a total time of 10 minutes is spent between 72-96 km/h (45-60 mph) with at least 4 lane changes during that time/speed window. Continue test driving the vehicle in the following manner: Bring the vehicle to a minimum speed of 72 km/h (45 mph), maximum of 96 km/h (60 mph). Maintain that speed for at least 10 minutes. During this 10-minute time period, make a minimum of 4 lane changes or turns that achieve a steering wheel angle of at least 20 degrees. The test drive is complete. Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions. Is DTC U3000:61 and/or U3000:96 present? Yes No INSTALL a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) . The condition to set the DTC is not present at this time. RETURN the vehicle to the customer. For all other PSCM DTCs, REFER to the «DTC Index - Power Steering Control Module (PSCM)»(ref-382378-S04149171252013020600000) .

When the ignition is turned ON a relay inside the power steering control module (PSCM) is energized, which sends power to other portions of the module. The PSCM monitors this relay output and will set a DTC if output is not detected.

D1: CHECK FOR RETURNING DTCS Clear the PSCM DTCs. Cycle the ignition to OFF and then back to RUN. Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions. Is DTC U3000:72 present? Yes No Install a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) . The condition to set the DTC is not present at this time. In cold climates or climates where frost is possible, the relay contacts could develop a layer of frost which may prevent a clean connection between the relay contacts. It may be necessary to allow the vehicle to remain outside overnight in a cold climate to duplicate the DTC trigger conditions. If the DTC was set during cold or frosty conditions, attempt to recreate the fault by allowing the vehicle to remain overnight in a cold or frosty environment. If the DTC was not set during cold or frosty conditions, RETURN the vehicle to the customer.
D2: ATTEMPT TO RECREATE THE FAULT CONDITIONS Park the vehicle in a cold or frosty environment and allow it to remain there overnight. NOTE: Do not allow the vehicle to warm up before carrying out the PSCM self-test. Ignition ON, engine OFF. Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions. Is DTC U3000:72 present? Yes No INSTALL a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) . The condition to set the DTC is not present at this time. RETURN the vehicle to the customer.

The power steering control module (PSCM) will use the motor inside the electronic power assist steering (EPAS) gear to calculate the relative and actual steering wheel angle, and then transmit this information to other modules over the high-speed controller area network (HS-CAN) bus.

E1: TEST DRIVE TO CHECK FOR RETURNING DTCS NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws. Clear the PSCM DTCs. Cycle the ignition to OFF and then back to RUN. Test drive the vehicle in the following manner: With the engine running/ready, stop the vehicle on an unsealed concrete or asphalt surface (in order to provide adequate friction for a thorough test). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. The test drive is complete. Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions. Is DTC C1B00:2F present? Yes No Go to E2. The condition to set the DTC is not present at this time. DISCONNECT and INSPECT all 3 PSCM connectors for corrosion, bent terminals and/or pushed-out pins. REPAIR as necessary. If the connectors are okay, INSPECT the wire harness along the top of the EPAS gear for cuts, breaks and/or pinches. REPAIR as necessary. For all other PSCM DTCs, REFER to the «DTC Index - Power Steering Control Module (PSCM)»(ref-382378-S04149171252013020600000) .
E2: INSPECT THE INNER TIE RODS With the vehicle in NEUTRAL, position it on a hoist. Refer to «JACKING & LIFTING»(ref-382368) . NOTE: When installing new bellows boots and clamps apply new lubricant as instructed to prevent water contamination or damage may result to the electronic power assist steering (EPAS) gear. For complete information refer to the Tie Rod - Inner Removal and Installation procedure in «POWER STEERING SYSTEM»(ref-382383) NOTE: When installing new bellows boots and clamps apply new lubricant as instructed to prevent water contamination or damage may result to the electronic power assist steering (EPAS) gear. For complete information refer to the Tie Rod - Inner Removal and Installation procedure in «STEERING SYSTEM»(ref-382378) . Are the inner tie rods correctly installed? Yes No INSTALL a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) . INSTALL new inner tie rod(s), bellows boot(s) and clamps as necessary. REFER to «POWER STEERING SYSTEM»(ref-382383) .

F1: CHECK AND RECORD THE LEFT FRONT AND RIGHT FRONT TIRE PRESSURES Check and record the left front and right front tire pressures. Compare the recorded tire pressure readings with the information on the vehicle certification (VC) label. Is the air pressure in the tires correct as indicated on the VC label? Yes No Go to F2. ADJUST the air pressure in the tires. Go to F2.
F2: CHECK FOR UNLOADED STEERING RACK TRAVEL FEEL With the vehicle in NEUTRAL, position it on a hoist. Refer to «JACKING & LIFTING»(ref-382368) . Ignition OFF. Raise the vehicle until the front wheels no longer touch the ground. Rotate the steering wheel from lock-to-lock and inspect the steering rack travel for the following: Abnormal noises Rough spots Sticky spots Tight spots Is steering rack travel smooth and free of any abnormal noises, rough, sticky and tight spots? Yes No Go to F4 . Go to F3.
F3: INSPECT THE INNER TIE RODS AND STEERING RACK FOR CORROSION The following inspection must be carried out on BOTH sides of the steering rack: Turn the steering wheel in one direction all the way until it stops to expose the steering rack. Inspect the rack, inner tie rod and gear housing for rust, moisture, corrosion and other signs of harmful contamination. Is the rack, inner tie rod and gear housing free of moisture, rust, corrosion and other harmful contamination? Yes No No fault found. The condition which caused the concern is not present at this time. The condition may have been caused by under-inflated tires. INSTALL new bellows boots with new clamps and install the removed outer tie rods. REFER to «POWER STEERING SYSTEM»(ref-382383) . ADJUST the front toe setting. REFER to «TOE ADJUSTMENT -- FRONT»(ref-382372-S19867751582011012300000) . INSTALL a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) .
F4: TEST DRIVE TO CHECK FOR RETURNING DTCS Clear the PSCM DTCs. Cycle the ignition to OFF and then back to RUN. NOTE: Always drive the vehicle in a safe manner according to driving conditions and obey all traffic laws. Test drive the vehicle in the following manner: With the engine running/ready, stop the vehicle on an unsealed concrete or asphalt surface (in order to provide adequate friction for a thorough test). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. NOTE: The next portion of the test drive will require the vehicle to be driven at highway speeds. NOTE: The test period is a cumulative time of 10 minutes. Stopping, going slower than 72 km/h (45 mph) or faster that 96 km/h (60 mph) will not affect the test as long as a total time of 10 minutes is spent between 72-96 km/h (45-60 mph) with at least 4 lane changes during that time/speed window. Continue test driving the vehicle in the following manner: Bring the vehicle to a minimum speed of 72 km/h (45 mph), maximum of 96 km/h (60 mph). Maintain that speed for at least 10 minutes. During this 10-minute time period, make a minimum of 4 lane changes or turns that achieve a steering wheel angle of at least 20 degrees. The test drive is complete. Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions. Is DTC P07AE:09 present? Yes No INSTALL a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) . The condition set the DTC is not present at this time. RETURN the vehicle to the customer. For all other PSCM DTCs, REFER to the «DTC Index - Power Steering Control Module (PSCM)»(ref-382378-S04149171252013020600000) .

With a fully charged battery and the ignition ON, the electronic power assist steering (EPAS) system should provide adequate assist to maneuver the vehicle and should be able to return to the straight-ahead position with little difficulty. The assist provided by the EPAS system should be smooth and consistent at all times. The steering and suspension components should be free of any binding conditions and should not interfere with the steering assist provided by the EPAS system.

If the steering wheel is held at lock end for more than 2 seconds the EPAS system will reduce assist noticeably. This is a normal condition programmed into the power steering control module (PSCM) to protect the system from permanent damage.

I1: CHECK CHARGING SYSTEM VOLTAGE Ignition ON, engine running. Slowly turn the steering wheel from lock to lock and take the measurement as the steering approaches the lock stop position. Measure the voltage between: (+) 12 Volt Vehicle Battery (-) 12 Volt Vehicle Battery Positive terminal Negative terminal Turn the steering wheel slowly from lock to lock and monitor the PID value displayed on the screen. Note the lowest PID reading value displayed while cycling the steering lock to lock. Access the PSCM and monitor the MOD_SUP_V (VOLT) PID. Is the battery voltage greater than 13 volts and does the PID match battery voltage +/- 1.5 volts? Yes No Go to I5 . Go to N4 .
I2: CHECK THE EPAS GEAR With the vehicle in NEUTRAL, position it on a hoist. Refer to «JACKING & LIFTING»(ref-382368) . Isolate the steering gear from the steering knuckles. NOTE: Do not disconnect the steering gear from the steering column. Turn the steering wheel through the full range of motion (lock-to-lock) Is the binding condition still present? Yes No Go to I3. The condition may be caused by tires, wheel knuckles and/or ball joints. ISOLATE the component(s) causing the binding. INSTALL new component(s) as necessary. DRIVE the vehicle to VERIFY the repair.
I3: CHECK THE STEERING COLUMN SHAFT AND DASH SEAL While turning the steering wheel, check for binding conditions between the moving components of the steering column and the vehicle body and steering column shroud(s). Steering wheel rubbing against steering column shrouds. Binding steering column shaft dash panel seal Has a binding condition been identified? Yes No ISOLATE the component(s) causing the binding. INSTALL new component(s) as necessary. REFER to «STEERING COLUMN»(ref-382405) . DRIVE the vehicle to VERIFY the repair. Go to I4.
I4: CHECK THE STEERING GEAR Using a suitable steering wheel holding device, hold the steering wheel in the straight ahead position. Disconnect the steering gear from the steering column. Check the steering gear for correct installation, tight spots and uneven operation. Is the binding condition still present? Yes No INSTALL a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) . DRIVE the vehicle to VERIFY the repair. ISOLATE the component(s) that is causing the binding. INSTALL a new component(s) as necessary. REFER to «STEERING COLUMN»(ref-382405) . DRIVE the vehicle to VERIFY the repair.
I5: CONCERN ISOLATION Is the vehicle experiencing a lack of assist or inconsistent assist? Yes No For an intermittent lack of assist: Go to I6. For lack of assist: REFER to «COMMUNICATIONS NETWORK»(ref-382388-S27871959372011012300000) to diagnose the no communication concern. For poor returnability or sticking steering: Go to I7 .
I6: CHECK FOR DTCS Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions. Is DTC U0131:00 present in the ABS and IPC modules, with no PSCM DTCs present? Yes No use the wiring diagrams manual to diagnose an intermittent connection on the PSCM voltage supply and ground circuits. If no DTCs are present: Go to I7. If PSCM DTCs are present: REFER to the DTC chart to diagnose the DTCs.
I7: CHECK THE STEERING GEAR With the vehicle in NEUTRAL, position it on a hoist. Refer to «JACKING & LIFTING»(ref-382368) . Isolate the steering gear from the steering knuckles. NOTE: Do not disconnect the steering gear from the steering column. Turn the steering wheel through the full range of motion (lock-to-lock) Is the binding condition still present? Yes No Go to I8. ISOLATE the component(s) causing the binding. INSTALL new component(s) as necessary.
I8: CHECK THE STEERING COLUMN FOR BINDING CONDITIONS While turning the steering wheel, check for binding conditions between the moving components of the steering column and the vehicle body and steering column shroud(s). Steering wheel rubbing against steering column shrouds. Binding steering column shaft dash panel seal Has a binding condition been identified? Yes No ISOLATE the component(s) causing the binding. INSTALL new component(s) as necessary. Go to I9.
I9: CHECK THE STEERING GEAR NOTE: The steering column must be locked in the straight ahead position using the service bolt (HB1), before the column is disconnected from the steering gear to prevent damage to the EPAS sensor internal clock-spring. Make sure that the steering wheel is set to the straight ahead position. lock the steering column using the service bolt. REFER to «POWER STEERING SYSTEM»(ref-382383) . Disconnect the steering gear from the steering column. Check the steering gear for correct installation, tight spots and uneven operation. Check the steering column U-joints for binding and uneven movement. Has a binding condition been identified? Yes No For Steering column shaft U-joints: INSTALL a new steering column shaft. For Steering gear: INSTALL a new steering gear as necessary. REFER to «POWER STEERING SYSTEM»(ref-382383) . INSTALL a new EPAS assembly.

The tie rods connect the electronic power assist steering (EPAS) gear to the wheel knuckles. There should be very little to no vertical or lateral movement in the inner and outer tie rod studs/sockets. Some rotational movement is acceptable.

J1: CHECK THE INNER AND OUTER TIE RODS FOR MOVEMENT With the vehicle in NEUTRAL, position it on a hoist. Refer to «JACKING & LIFTING»(ref-382368) . Using hand force only, check the inner and outer tie rods for vertical and lateral movement in the tie-rod ball studs/sockets. Are the inner and outer tie rods free from any vertical and/or lateral movement? Yes No The condition may be caused by wheel/tire runout. REFER to Diagnosis and Testing - Wheels and Tires in «WHEELS & TIRES»(ref-382371) . INSTALL a new inner or outer tie rod as necessary. REFER to Tie-Rod - Inner in «POWER STEERING SYSTEM»(ref-382383) .

The electric power assist steering (EPAS) gear is very susceptible to water, moisture, dust, rust and other contaminates. If a damaged boot is suspected the inner tie rods and steering rack should be inspected for contamination. If contamination is found a new EPAS gear should be installed.

New bellows boots and clamps must be installed whenever they are removed. To avoid unnecessary repairs address all other known concerns, DTCs and customer concerns before removing the bellows boots and inspecting the steering gear.

K1: INSPECT THE INNER TIE RODS AND STEERING RACK FOR CORROSION The following inspection must be carried out on BOTH sides of the steering rack: Turn the steering wheel in one direction all the way until it stops to expose the steering rack. Inspect the rack, inner tie rod and gear housing for rust, moisture, corrosion and other signs of harmful contamination. Is the rack, inner tie rod and gear housing free of moisture, rust, corrosion and other harmful contamination? Yes No INSTALL a New steering gear bellows boot(s). REFER to «POWER STEERING SYSTEM»(ref-382383) . ADJUST the front toe setting. REFER to «TOE ADJUSTMENT -- FRONT»(ref-382372-S19867751582011012300000) . INSTALL a new EPAS gear. REFER to «POWER STEERING SYSTEM»(ref-382383) .

The power steering control module (PSCM) monitors various inputs and outputs of the electronic power assist steering (EPAS) system in order to keep the system operating at peak capacity. Information provided by sensors (steering torque, vehicle speed, vehicle travel distance, etc.) are all compared to programmed and learned information. Likewise, outputs like the motor and steering wheel position are tested against programmed and learned information.

M1: CHECK FOR PREVIOUSLY SET DTCS Go to «KNOWN CONCERNS»(ref-382378-S05115870442013020600000) . Check for DTCs listed in the section: System Related CMDTCs cleared since initial read. Are any of the following DTCs present? PSCM DTCs, U0300:00, U2011:49, U2011:61, U3000:05, U3000:41, U3000:43, U3000:44, U3000:46, U3000:49, U3000:61, U3000:96, U3004:49, C1B00:2F, C1B00:61, C1B00:62, C200B:2F, C200B:61, C200B:62, C200C:2F, C200D:49. Yes No INSTALL a new EPAS column assembly. REFER to «STEERING COLUMN»(ref-382405) . Go to M2.
M2: FAULT CONFIRMATION Ignition OFF. Wait 90 seconds for the module to exit the active state. Ignition ON, engine OFF. Clear the PSCM DTCs. Ignition OFF. Wait 90 seconds for the module to exit the active state. Ignition ON, engine running. Test drive the vehicle in the following manner: With the engine running/ready, stop the vehicle on an unsealed concrete or asphalt surface (in order to provide adequate friction for a thorough test). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. Return the steering wheel to the center position and move the vehicle forward approximately 32 cm (1 ft). With the vehicle in gear and the brakes applied, turn the steering wheel lock-to-lock. The test drive is complete. Ignition ON, engine OFF. Carry out the PSCM self-test. Are DTCs C1B00-2f, C1B00-61, C1B00-62, C200B-61, C200B-62, C200B-2f, C200C-2f, C200D-49, U0300, U2011-49, U2011-61, U3000-5, U3000-41, U3000-43, U3000-44, U3000-46, U3000-49 or U3000-96 present? Yes No INSTALL a new EPAS column assembly. REFER to «STEERING COLUMN»(ref-382405) . The condition to set the DTC is not present at this time. RETURN the vehicle to the customer.

The power steering control module (PSCM) is supplied voltage through one high current and one low current circuit. The low current circuit is dedicated for PSCM module power. This allows the PSCM to monitor and detect system power concerns on the high current circuit. The entire electric power assist steering (EPAS) system uses one ground. Although the ground circuit is not directly monitored, ground circuit concerns may be interpreted by the PSCM as voltage supply concerns. Specific circuit schematics are provided in POWER STEERING CONTROLS .

Concerns with the vehicle electrical system or with the circuits described above may result in reduced steering assist. If voltage levels reach specific fault trigger conditions a message will be displayed in the message center and the PSCM will store a U3003 DTC. The specific fault trigger conditions associated with the U3003 DTCs are listed in the DTC Index - Power Steering Control Module (PSCM) .

Note. Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes.

Circuit	Pin
B+ (Battery Positive Voltage) - SBF02	1(YELLOW/RED)

CONNECTOR PIN DESCRIPTION - HARNESS SIDE

Scheme 1

Circuit

CONNECTOR PIN DESCRIPTION - HARNESS SIDE

Circuit

CONNECTOR PIN DESCRIPTION - HARNESS SIDE

N1: RETRIEVE ALL CMDTCS FROM ALL MODULES Ignition ON, engine running. Press Read Vehicle Information button to retrieve DTC s from the vehicle. NOTE: DTCs may be displayed from previous diagnostic actions. Is the PCM AND at least one other module in addition to the PSCM reporting charging system and/or battery voltage DTCs? Yes No REFER to «CHARGING SYSTEM»(ref-382376) to diagnose the battery and charging system. Go to N2.
N2: CHECK THE CONDITION OF THE BATTERY Ignition OFF. REFER to «BATTERY, BATTERY MOUNTING SYSTEM & BATTERY CABLES»(ref-382392) , Diagnosis and Testing, and implement Pinpoint Test A: Battery - Condition Test. Does the battery pass the condition test? Yes No Go to N3. INSTALL a new 12-volt battery. CLEAR the DTCs. REPEAT the self-test.
N3: CHECK THE BATTERY STATE OF CHARGE Review the results from the battery condition test. Did the battery require a recharge? Yes No REFER to «CHARGING SYSTEM»(ref-382376) to diagnose the battery and charging system. Go to N4.
N4: CHECK CHARGING SYSTEM VOLTAGE Ignition ON, engine running. Turn off all accessories. Measure the voltage between: (+) 12 Volt Vehicle Battery (-) 12 Volt Vehicle Battery Positive terminal Negative terminal Turn the headlamps on and set the HVAC fan to high. Measure the voltage between: (+) 12 Volt Vehicle Battery (-) 12 Volt Vehicle Battery Positive terminal Negative terminal Are the voltages between 13 and 15.2 volts? Yes No Go to N5. REFER to «CHARGING SYSTEM»(ref-382376) to diagnose the battery and charging system.
N5: CHECK THE PSCM MODULE SUPPLY VOLTAGE (MOD_SUP_V) PID Turn the steering wheel slowly from lock to lock and monitor the PID value displayed on the screen. Note the lowest PID reading value displayed while cycling the steering lock to lock. Access the PSCM and monitor the MOD_SUP_V (VOLT) PID. Does the lowest PID value displayed match the loaded battery voltage +/- 1.5 volts? Yes No An intermittent fault may be present in the wiring harness. Visually check for chaffed wires or other physical damage to the harness. If no fault is found in the circuit, suspect the following component(s): PSCM_A Connector PSCM_B Connector PSCM_C Connector To gain access to the EPAS electrical connectors, the knee air bag module will need to be removed. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-382402) for additional information. CLEAR the DTCs. REPEAT the self-test. Go to N6.
N6: CHECK HIGH-CURRENT BJB FUSE 2 (60A) Ignition OFF. Check the condition of high-current BJB fuse 2 (60A), attached to the battery positive terminal. Check the fuse connection for security, damage and corrosion. Is the fuse in good condition and the fuse connection secure and free from damage or contamination? Yes No Go to N7. Loose electrical connection. CLEAN and TIGHTEN the electrical connection. To gain access to the EPAS electrical connectors, the knee air bag module will need to be removed. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-382402) for additional information. CLEAR the DTCs. REPEAT the self-test. Blown fuse. Install a new fuse. CLEAR the DTCs. REPEAT the self-test.
N7: CHECK THE PSCM BATTERY VOLTAGE INPUT CIRCUIT FOR AN OPEN NOTE: To gain access to the EPAS electrical connectors, the knee air bag module will need to be removed. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-382402) for additional information. PSCM_A connector disconnected. (C2368A) High-current Battery Junction Box connector disconnected. (C1617B) Measure the resistance between: (+) High-current Battery Junction Box (C1617B) Connector, Harness Side (-) PSCM_A (C2368A) Connector, Harness Side B+ - SBF02 (YELLOW/RED) - Pin 1 B+ - SBF02 - Pin 1 Is the resistance less than 5 Ohm? Yes No Go to N8. REPAIR the open circuit. CLEAR the DTCs. REPEAT the self-test.
N8: CHECK THE PSCM GROUND Inspect ground G200 for looseness and corrosion. Are the ground bolt and eyelet tight and free from any corrosion? Yes No REPAIR the open circuit. INSPECT the PSCM connectors for corrosion, spread terminals and pushed-out terminals. REPAIR as necessary. To gain access to the EPAS electrical connectors, the knee air bag module will need to be removed. REFER to «SUPPLEMENTAL RESTRAINT SYSTEM»(ref-382402) for additional information. If the connectors are okay, REPAIR the PSCM ground circuit. CLEAR the DTCs. REPEAT the self-test. CLEAN and TIGHTEN ground connection. CLEAR the DTCs. REPEAT the self-test.

The PSCM continually monitors and adjusts steering efforts based on the torque sensor inputs to enhance feel of the steering system. Compensation is made to reduce the effect of pull or drift that may be experienced when driving on roads with a high degree of camber. If the level of compensation required to keep the vehicle driving straight ahead exceeds a pre set level a DTC will be set.

O1: VISUAL INSPECTION Carry out a visual inspection. Check for even tire sizes and pressures as per the manufacturer's specification. Check for uneven tire wear. Check the outer tie rod ends and suspension ball joints for impeded movement. Verify that the steering column shaft rotates freely and is not grounded against other vehicle components. Check the steering gear for correct installation, tight spots and uneven operation. Check the steering and suspension for bent or damaged components. Check the steering and suspension geometry. Has a concern been identified? Yes No REPAIR the concern identified during the visual inspection. CLEAR the DTCs. CARRY OUT the steering angle sensor calibration procedure. REFER to PROGRAMMABLE PARAMETERS/STEERING WHEEL POSITION SENSOR CALIBRATION on the IDS and follow the calibration procedure. CLEAR the DTCs. CARRY OUT the steering angle sensor calibration procedure. REFER to PROGRAMMABLE PARAMETERS/STEERING WHEEL POSITION SENSOR CALIBRATION on the IDS and follow the calibration procedure.

The steering wheel position must be calibrated to the straight ahead position after installation of a new steering column, a new steering column intermediate shaft, repairs to the vehicle suspension or adjustment of the vehicle steering and suspension geometry.

P1: STEERING ANGLE SENSOR CALIBRATION Ignition ON, engine running. Turn the steering wheel approximately thirty degrees in each direction, then return to the central position. Make sure that the steering wheel is set to the straight ahead position. Ignition ON, engine OFF. With the vehicle stationary run the steering angle sensor calibration procedure. REFER to PROGRAMMABLE PARAMETERS/STEERING WHEEL POSITION SENSOR CALIBRATION on the IDS and follow the calibration procedure. Clear the PSCM DTCs. Ignition OFF. Wait 90 seconds for the module to exit the active state. Ignition ON, engine OFF. Carry out the PSCM self-test. Are DTCs C1B00-95 or C1B00-54 present? Yes No INSTALL a new EPAS assembly. The customers concern has been corrected.

The tie rods connect the steering gear to the wheel knuckles. There should be very little to no vertical or lateral movement in the inner and outer tie rod studs/sockets. Some rotational movement is acceptable.

Q1: CHECK THE INNER AND OUTER TIE RODS FOR MOVEMENT With the vehicle in NEUTRAL, position it on a hoist. Refer to «JACKING & LIFTING»(ref-382368) . Using hand force only, check the inner and outer tie rods for vertical and lateral movement in the tie-rod ball studs/sockets. Are the inner and outer tie rods free from any vertical and/or lateral movement? Yes No Go to Q2. INSTALL a new inner or outer tie rod as necessary. REFER to Tie-Rod - Inner in «POWER STEERING SYSTEM»(ref-382383) .
Q2: CHECK THE SUSPENSION BALL JOINTS AND BUSHINGS FOR DAMAGE, SECURITY, EXCESSIVE FREE PLAY AND IMPEDED MOVEMENT Check the suspension ball joints and bushings for damage, security, excessive free play and impeded movement. Has a concern been identified? Yes No REPAIR as necessary. The condition may be caused by wheel/tire runout. REFER to Diagnosis and Testing - Wheels and Tires in «WHEELS & TIRES»(ref-382371) .

Steering System: Overview Ford Fiesta Mk6

Description

Normal Operation

Scheme 1

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