Pinpoint Test X: DTC C1998 - Module Calibration Not Complete

NOTE: The stability assist lamp will flash when a system calibration is required. Calibration is required after certain DTCs are cleared.

NOTE: Make sure the vehicle is not on a hoist and is sitting on level ground before performing ABS MODULE CALIBRATION (ABS WITH STABILITY ASSIST) .

X1 CHECK FOR DTCs

Fig 1: Identifying Results From SJB Self-Test
Courtesy of FORD MOTOR CO.
1. Connect diagnostic tool.
2. Turn ignition on.
3. Using the recorded results from the SJB self-test:
- Is any other DTC retrieved with C1998?
1. Yes : GO to the appropriate pinpoint test for the DTC.
  Some of the pinpoint tests recommend ABS module calibration prior to any further diagnostics; in this case, GO to X2.
2. No : GO to X2.
X2 ABS MODULE CALIBRATION

Fig 2: Identifying ABS Module Calibration
Courtesy of FORD MOTOR CO.
1. Connector diagnostic tool.
2. Start the engine.
  NOTE: Be sure to rotate the steering wheel lock-to-lock during the calibration of the ABS system.
3. Carry out the ABS module calibration per the diagnostic tool instructions.
- Did the calibration complete for all of the stability assist sensors; and did the stability assist lamp stop flashing and go off?
1. Yes : GO to X3.
2. No : GO to X4.
  Some concerns will cause the calibration not to complete. If sent here from another pinpoint test, return to that pinpoint test for further diagnostics.
X3 CLEAR DTC C1998
NOTE: Clear DTC C1998 after completing the calibration.

Fig 3: Completing Calibration
Courtesy of FORD MOTOR CO.
1. Connector diagnostic tool.
2. Turn ignition on.
3. Clear the DTC.
- Did the DTC clear?
1. Yes : TEST DRIVE the vehicle. REPEAT the self-test.
  If sent here from another pinpoint test, return to that pinpoint test for further diagnostics.
2. No : GO to X4.
X4 MONITOR THE STEERING POSITION SENSOR PIDS

Fig 4: Identifying Monitor ABS Module Steering Position Sensor PIDs
Courtesy of FORD MOTOR CO.
1. Turn ignition on.
2. Monitor the ABS module steering position sensor PIDS while rotating the steering wheel clockwise and counterclockwise.
- Are the two steering position sensor PID values switching as the wheel rotates?
1. Yes : Go To PINPOINT TEST O: DTC C1279, C1280, C1281, C1282, C2769, C2770, C2777, C2778-SENSOR CLUSTER FAULT .
2. No : Go To PINPOINT TEST N: DTC C1277 AND C1278 - STEERING WHEEL ANGLE 1 AND 2 CIRCUIT FAILURE/FAULTED .