Pinpoint Test F: DTC U2197 - Invalid Vehicle Speed Data

CAUTION: Use the correct probe adapter(s) when taking measurements. Failure to use the correct probe adapter(s) may damage the connector.

F1 CHECK THE RECORDED DTCs FROM THE TCM
- Check the recorded results from the TCM self-test.
- Are any TCM DTCs recorded?
Yes: REFER to INTRODUCTION -- HYBRID ESCAPE & HYBRID MARINER article to continue diagnosis of the vehicle speed signal.

No: GO to F2.
F2 CHECK THE RECORDED DTCs FROM THE POWER STEERING CONTROL MODULE
NOTE: To clear DTCs, it is necessary to cycle the ignition switch to the OFF position for 3 seconds.
- Check the recorded results from the power steering control module self-test.
- Are any power steering control module DTCs recorded?
Yes: REPAIR all other power steering control module DTCs before continuing diagnosis of DTC U2197. REFER to the POWER STEERING CONTROL MODULE DIAGNOSTIC TROUBLE CODE (DTC) INDEX . CLEAR the DTCs. CYCLE the ignition switch to the OFF position for 3 seconds. REPEAT the self-test.

No: GO to F3.
F3 MONITOR THE VEHICLE SPEED SIGNAL PID IN THE TCM
- Enter the following diagnostic mode on the scan tool: TCM PID.
- Road test the vehicle at various speeds while monitoring the vehicle speed signal PID.
- Does the vehicle speed signal PID indicate the vehicle speed?
Yes: GO to F4.

No: REFER to INTRODUCTION -- HYBRID ESCAPE & HYBRID MARINER article to continue diagnosis of the vehicle speed signal.
F4 MONITOR THE VEHICLE SPEED SIGNAL PID IN THE POWER STEERING CONTROL MODULE
- Enter the following diagnostic mode on the scan tool: Power Steering Control Module PID.
- Road test the vehicle at various speeds while monitoring the vehicle speed signal PID.
- Does the vehicle speed signal PID indicate the vehicle speed?
Yes: CLEAR the DTCs. CYCLE the ignition switch to the OFF position for 3 seconds. If DTC U2197 is retrieved again, GO to F6.

If no DTCs are retrieved the system is operating correctly at this time.

No: GO to F5.
F5 CHECK THE CAN CIRCUITS BETWEEN THE POWER STEERING CONTROL MODULE AND THE DLC FOR AN OPEN
- Key in OFF position.
- Disconnect: Power Steering Control Module C1463b.
- Measure the resistance between power steering control module C1463b-14, circuit 1908 (WH), harness side and the DLC C251-6, circuit 1908 (WH), harness side; and between power steering control module C1463b-16, circuit 1909 (BK), harness side and the DLC C251-14, circuit 1909 (BK), harness side.
  
  Fig 1: Checking CAN Circuits Between Power Steering Control Module & DLC For An Open
  Courtesy of FORD MOTOR CO.
- Are the resistances less than 5 ohms?
Yes: GO to F6.

No: REPAIR circuit(s) 1908 (WH) and/or 1909 (BK) for an open. CLEAR the DTCs. CYCLE the ignition switch to the OFF position for 3 seconds. REPEAT the self-test. CARRY OUT the data link diagnostics test.
F6 CHECK FOR CORRECT POWER STEERING CONTROL MODULE OPERATION
- Disconnect all the power steering control module connectors.
- Check for:
  - corrosion.
  - pushed-out pins.
- Connect all power steering control module connectors and make sure they are seated correctly.
- Operate the system and verify that the concern is still present.
- Is the concern still present?
Yes: INSTALL a new power steering control module. REFER to REMOVAL AND INSTALLATION . CLEAR the DTCs. CYCLE the ignition switch to the OFF position for 3 seconds. REPEAT the self-test.

No: The system is operating correctly at this time. The concern may have been caused by a loose or corroded connector. CLEAR the DTCs. CYCLE the ignition switch to the OFF position for 3 seconds. REPEAT the self-test.