Ford - Escape Hybrid - Parts Catalogue - 2008 - 2008

2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual Page 1 of 4 Pinpoint Test E: Poor Returnability/Sticky Steering and Steering Has a Lack of Assist or Inconsistent Assist Refer to Wiring Diagrams Cell 43 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Power Steering Controls for schematic and connector information. Normal Operation With a fully charged battery and the ignition in the ON position, 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. The Power Steering Control Module (PSCM) will enter into a limited operation mode that may result in a lack of assist or inconsistent assist for the following reasons:


Battery and/or charging system voltage exceeds 16 volts. The charging system warning indicator is illuminated and battery/charging system voltage falls below 11.8 volts. The charging system warning indicator is not illuminated and battery/charging system voltage falls below 10.8 volts. The limited operation mode is a fail-safe mode that will allow the continued, safe operation of the steering system in the event of a high/low voltage condition. Fused ignition voltage for the EPAS system is supplied to the PSCM by Smart Junction Box (SJB) fuse 35 (10A) along circuit CBP35 (YE/GY). Fused battery voltage for the EPAS system motor is supplied to the control module by the Battery Junction Box (BJB) 80A MIDI fuse (WH) along circuit SBB01 (RD). Ground for the control module is provided along circuit GD116 (BK/VT). The PSCM communicates with the other vehicle modules along the High Speed Controller Area Network (HS-CAN) bus, circuits VDB04 (WH/BU) and VDB05 (WH).






This pinpoint test is intended to diagnose the following: Fuse(s) Wiring, terminals or connectors Vehicle battery/charging system Steering wheel position sensor calibration Steering components Suspension components Steering column PINPOINT TEST E: POOR RETURNABILITY/STICKY STEERING AND STEERING HAS A LACK OF ASSIST OR INCONSISTENT ASSIST NOTICE: Use the Flex Probe Kit for all test connections to prevent damage to the wiring terminals. Do not use standard multi-meter probes. NOTE: Carry out a thorough inspection and verification before proceeding with the pinpoint test. Refer to Inspection and Verification in this section. Test Step Result / Action to Take E1 CHECK FOR CHARGING SYSTEM DTCs



Connect the scan tool. Ignition ON. Enter the following diagnostic mode on the scan tool: Self Test — PCM. Are there any charging system DTCs present? Yes REFER to the Diagnostic Trouble Code (DTC) Chart in Section 419-10. No GO to E2. E2 RETRIEVE ALL PSCM DTCs

Enter the following diagnostic mode on the scan tool: Self Test — PSCM. Are any DTCs present? Yes REFER to the Power Steering Control Module (PSCM) DTC Chart in this section. No If the vehicle is currently exhibiting a lack of assist or inconsistent assist, GO to E3. If the vehicle is not currently exhibiting a lack of assist or inconsistent assist, GO to E12. E3 VERIFY PSCM ELECTRICAL CONNECTIONS






Disconnect: PSCM C2231A. Disconnect: PSCM C2231B. Connect: PSCM C2231A. Connect: PSCM C2231B. NOTE: The connectors should make an audible "click" noise when seated correctly. Make sure both connectors are seated correctly, then test drive the vehicle and verify the concern. Is the concern still present? Yes GO to E4. No The concern was caused by a loose or incorrectly connected electrical connector. RETURN the vehicle to the customer. E4 CALIBRATE THE STEERING WHEEL POSITION SENSOR


Carry out the Steering Wheel Position Sensor Calibration in this section. Drive the vehicle and confirm that the condition is no longer present. Has the condition been corrected? Yes The condition was due to an incomplete or incorrect sensor calibration. TEST the system for normal operation. No GO to E5. E5 CHECK THE SUSPENSION COMPONENTS

Isolate the suspension components, check for any binding conditions. Are the suspension components free from any binding conditions? Yes GO to E6. No ISOLATE the suspension component(s) that is causing the binding. INSTALL a new component(s) as necessary. REFER to Section 204-01. TEST the system for normal operation. E6 CHECK THE STEERING GEAR AND LINKAGE


Carry out the Steering Linkage Component Test in this section. Isolate the steering gear and linkage, check for any binding conditions. Are the steering gear and linkage free from any binding conditions? Yes GO to E7. No ISOLATE the component(s) that is causing the binding. INSTALL a new component(s) as necessary. REFER to http://www.fordtechservice.dealerconnection.com/pubs/content/~WS8K/~MUS~LEN/19/S8... 1/4/2010 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual Page 2 of 4 Section 211-02 or Section 211-03. TEST the system for normal operation. E7 CHECK THE STEERING COLUMN SHAFT AND DASH SEAL

Isolate the steering column shaft and dash seal, check for any binding conditions. Are the shaft and seal free from any binding conditions? Yes GO to E8. No ISOLATE the component(s) that is causing the binding. INSTALL a new component(s) as necessary. REFER to Steering Column Shaft in Section 211-04. TEST the system for normal operation. E8 CHECK THE CHARGING SYSTEM VOLTAGE WHILE LOADING THE EPAS SYSTEM










Start the engine. Turn on all electrical accessories and allow the engine idle to stabilize. NOTE: A meter with a Min/Max feature and/or recording capabilities must be used to obtain accurate measurements. Connect the meter to the battery terminals; positive lead to positive terminal, negative lead to negative terminal. Yes GO to E9. No REFER to Section 414-00 to diagnose the charging system. Set the meter to measure DC voltage. Set the meter range to greater than 15 volts. Enable the Min/Max or recording feature. NOTE: In order to provide adequate friction for a thorough test, make sure the vehicle is parked on an unsealed concrete or asphalt surface. While turning the steering wheel from stop to stop, measure the voltage between the battery positive post and the battery negative post. Record the lowest displayed voltage. Is the lowest displayed voltage greater than 12 volts? E9 CHECK THE IGNITION VOLTAGE TO THE PSCM



Ignition OFF. Disconnect: PSCM C1463A. Ignition ON. Measure and record the voltage between the battery positive post and the battery negative post. Yes GO to E10. No VERIFY SJB fuse 35 (10A) is OK. If OK, REPAIR circuit CBP35 (YE/GY). If the fuse is not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short. TEST the system for normal operation.
Measure the voltage between PSCM C1463A-1, circuit CBP35 (YE/GY), harness side and ground.
Is the voltage within 0.5 volt of the recorded battery voltage? E10 CHECK THE HIGH CURRENT CIRCUIT





Ignition OFF. Connect: PSCM C1463A. Start the engine, turn on all electrical accessories and allow the engine idle to stabilize. NOTE: A meter with a Min/Max feature and/or recording capabilities must be used to obtain accurate measurements. NOTE: In order to obtain the best possible readings with the meter, make sure the meter leads have a good, clean connection to the item being measured. Connect the positive lead of the meter to PSCM C1463B-1 by backprobing the connector. Connect the negative lead of the meter to the battery negative post. Yes GO to E11. No VERIFY BJB 80A MIDI fuse (WH) is OK. If OK, REPAIR circuit SBB01 (RD). If the fuse is not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short. TEST the system for normal operation. http://www.fordtechservice.dealerconnection.com/pubs/content/~WS8K/~MUS~LEN/19/S8... 1/4/2010 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual






Page 3 of 4 Set the meter to measure DC voltage. Set the meter range to greater than 15 volts. Enable the Min/Max or recording feature. NOTE: In order to provide adequate friction for a thorough test, make sure the vehicle is parked on an unsealed concrete or asphalt surface. While turning the steering wheel from stop to stop, measure the voltage between PSCM C1463B-1, circuit SBB01 (RD), harness side and the battery negative post, by backprobing the PSCM connector. Record the lowest displayed voltage. Is the lowest displayed voltage within 0.5 volt of the lowest displayed voltage recorded in Step E8? E11 CHECK THE PSCM GROUND CIRCUIT


NOTE: In order to obtain the best possible readings with the meter, make sure the meter leads have a good, clean connection to the item being measured. With the engine still running and while turning the steering wheel from stop to stop, measure the voltage between PSCM C1463B-2, circuit GD116 (BK/VT), harness side and the battery negative post, by backprobing the PSCM connector. Yes INSTALL a new steering column. REFER to Section 21104. No REPAIR circuit GD116 (BK/VT). TEST the system for normal operation. Is the voltage less than 0.5 volt? E12 INSPECT THE EPAS ELECTRICAL CONNECTIONS



Ignition OFF. Using a good light source, inspect the following connections for corrosion, pushed-out/bent pins, spread/bent terminals and loose connections:  PSCM C1463A  PSCM C1463B  Ground G206  BJB 80A MIDI fuse (WH)  SJB fuse 35 (10A) Using a suitable mating terminal, check each terminal for deformed or enlarged contacts by comparing the fit of the mating terminal between each pin location.  Refer to Wiring Diagrams Cell 5 (Escape/Mariner, Escape Hybrid/Mariner Hybrid), Connector Repair Procedures for schematic and connector information. Yes GO to E13. No REPAIR or INSTALL new as necessary. TEST the system for normal operation. Are the connections OK? E13 CHECK THE BATTERY VOLTAGE











Connect all previously disconnected connectors. Start the engine. Turn on all electrical accessories and allow the engine idle to stabilize. NOTE: A meter with a Min/Max feature and/or recording capabilities must be used to obtain accurate measurements. Connect the meter to the battery terminals; positive lead to positive terminal, negative lead to negative terminal. Yes GO to E14. No REFER to Section 414-00 to diagnose the charging system. Set the meter to measure DC voltage. Set the meter range to greater than 15 volts. Enable the Min/Max or recording feature. NOTE: In order to provide adequate friction for a thorough test, make sure the vehicle is parked on an unsealed concrete or asphalt surface. While turning the steering wheel quickly (at least 60 rpm or 1 revolution per second) from stop to stop, measure the voltage between the battery positive post and the battery negative post. Record the lowest displayed voltage. Is the lowest displayed voltage greater than 12 volts? E14 CHECK THE EPAS MOTOR VOLTAGE SUPPLY

NOTE: A meter with a Min/Max feature and/or recording capabilities must be used to obtain accurate measurements. NOTE: In order to obtain the best possible readings with the meter, make sure the meter leads have a good, clean connection to the item being measured. Yes GO to E15. No http://www.fordtechservice.dealerconnection.com/pubs/content/~WS8K/~MUS~LEN/19/S8... 1/4/2010 2008 Escape/Mariner/Escape Hybrid/Mariner Hybrid Workshop Manual
Connect the positive lead of the meter to PSCM C1463B-1 by backprobing the connector. Connect the negative lead of the meter to the battery negative post. Page 4 of 4 VERIFY BJB 80A MIDI fuse (WH) is OK. If OK, REPAIR circuit SBB01 (RD). If the fuse is not OK, REFER to the Wiring Diagrams manual to identify the possible causes of the circuit short. TEST the system for normal operation.







Set the meter to measure DC voltage. Set the meter range to greater than 15 volts. Enable the Min/Max or recording feature. NOTE: In order to provide adequate friction for a thorough test, make sure the vehicle is parked on an unsealed concrete or asphalt surface. With the engine still running and while turning the steering wheel quickly (at least 60 rpm or 1 revolution per second) from stop to stop, measure the voltage between PSCM C2231B-1, circuit SBB01 (RD), harness side and the battery negative post, by backprobing the PSCM connector. Record the lowest displayed voltage. Compare the recorded voltage to the voltage recorded in Step E12. Is voltage difference less than 0.5 volt? E15 CHECK THE GROUND CIRCUIT FOR EXCESSIVE RESISTANCE
With the engine still running and while turning the steering wheel quickly (at least 60 rpm or 1 revolution per second) from stop to stop, measure the voltage between PSCMC2231B-2, circuit GD116 (BK/VT), harness side and the battery negative post, by backprobing the PSCM connector. Yes The concern is not present at this time and may have been caused by a loose or corroded connector. RETURN the vehicle to the customer. No REPAIR circuit GD116 (BK/VT). TEST the system for normal operation
Is the voltage less than 0.5 volt? http://www.fordtechservice.dealerconnection.com/pubs/content/~WS8K/~MUS~LEN/19/S8... 1/4/2010