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Home >> Volvo >> 1995 >> 850 GLT, 4D Sedan, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 6 (Anti-Lock Brake System & Traction Control) >> Diagnosis & Testing >> DTC 221 & DTC 222: Front Wheel Sensor Signal - Abs Control Phase Too Long

DTC 221 & DTC 222: Front Wheel Sensor Signal - Abs Control Phase Too Long

WARNING: This page is about a different car, the 1996 Volvo 850. However, it is still accessible from the selected car via links, so may be relevant.
  1. If fault is intermittent, go to step 9). If fault is permanent, check if additional DTCs are present. If only DTCs 213 and 214 are present, go to step 3). If DTCs 221, 222, 311, and/or 312 are present (for same wheel), perform diagnosis starting with step 7) in DTC 311 & 312  test, then go to next step.
  2. Turn ignition on. Use scan tool and enter running values, list No. 1. Test drive vehicle. Maintain an even speed without turning. If wheel in question has the same speed as other wheels, go to step 5). If suspect wheel does not have the same speed as other wheels, go to next step.
  3. Turn ignition off. Disconnect ABS control module. Connect breakout box. Connect ohmmeter between breakout box pins No. 4 and 11 (DTC 221), or between pins No. 3 and 18 (DTC 222). If ohmmeter reads 1040-1160 ohms, go to step 5). If ohmmeter does not read 1040-1160 ohms, go to next step.
  4. Remove wheel for better access. Clean around wheel sensor connector. Disconnect wheel sensor 2-pin connector. Connect ohmmeter between connector terminals No. 1 and 2. If ohmmeter reads 1040-1160 ohms, DTC was caused by poor terminal contact. Repair as necessary. If ohmmeter does not read 1040-1160 ohms, replace wheel sensor.
  5. Ensure ignition is off. Reconnect ABS control module. Turn ignition on. Connect voltmeter between breakout box terminals No. 8 and 4 (DTC 221), or between breakout box terminals No. 8 and 3 (DTC 222). If voltmeter reads 2.3 volts, go to step 8). If voltmeter reads greater than 2.3 volts, go to step 7). If voltmeter reads less than 2.3 volts, go to next step.
  6. Check for a short to ground in wiring between wheel sensor connector terminals and ABS control module. See DTC 221 & 222 TERMINAL IDENTIFICATION  table. Refer to wiring diagram for control module terminal identification. Repair as necessary.
    DTC 221 & 222 TERMINAL IDENTIFICATION

    Wheel Sensor Terminal No. Control Module Terminal No.
    DTC 221
    1 11
    2 4
    DTC 222
    1 18
    2 3
  7. Check for a short to voltage in wiring between wheel sensor connector terminals and ABS control module. See DTC 221 & 222 TERMINAL IDENTIFICATION  table. Repair as necessary.
  8. Check wheel bearing for suspect wheel. Front wheel bearings are not adjustable. Repair as necessary. If wheel bearing is okay, check for possible seized brakes. Repair as necessary. If brakes are okay, check wheel sensor for dirt, damage, or looseness. Repair or replace as necessary. If wheel sensor is okay, ensure pulse wheel is positioned securely, all teeth are intact, and are not scratched. Repair or replace as necessary. If pulse wheel is okay, DTC was caused by poor contact in wheel sensor or ABS control module terminals. Repair as necessary.
  9. If fault is intermittent, check for causes of a locked wheel, such as wheel bearing, brake caliper or parking brake. Check wheel sensor and pulse wheel. Check wiring between ABS control module and wheel sensor for intermittent opens, short to ground, or short to voltage. See DTC 221 & 222 TERMINAL IDENTIFICATION  table. Repair as necessary.
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