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Source reference 2005-04-51

Manufacturer communication — 2002 GMC FULL SIZE TRUCKS AND UTILITIES (YUKON)

Reporter type: Manufacturer

Vehicles as recorded

What the manufacturer’s document says

normal characteristic (no repair) ・ names no model (for full-size utilities)

Applies to

  • Applies to 2002-05 Chevrolet and GMC full size trucks and utilities with Quadrasteer (NYS) Rear Wheel Steering: owners may comment that the rear wheels stay turned even after the front wheels are straight.

    the passage
    Owners of some 2002-05 Chevrolet and GMC full size trucks and utilities with Quadrasteer (NYS) Rear Wheel Steering may comment that the rear wheels stay turned even after the front wheels are straight.

Fault

  • This may be accompanied by a Service 4 Wheel Steer message on the DIC and/or a DTC set in the 4 Wheel Steer module.

    the passage
    This may be accompanied by a Service 4 Wheel Steer message on the DIC and/or a DTC set in the 4 Wheel Steer module.

Finding the cause

Possible causes

  • When a fault is detected during a turn, the Rear Wheel Steering module performs a controlled re-centering of the rear wheels, which may take up to 30 seconds.

    the passage
    When a fault is detected during a turn, the Rear Wheel Steering module will perform a controlled re-centering of the rear wheels. It may take up to 30 seconds for the rear wheels to center.

  • During these 30 seconds the owner may have straightened the front wheels while the rear wheels are still turned (dog tracking).

    the passage
    During this 30 seconds, the owner may have straightened the front wheels and the rear wheels could still be turned (dog tracking).

Steps to confirm (in the document’s order)

  • Do not let this normal operation add confusion to the actual concern; perform normal diagnostics for the DTC set.

    the passage
    Do not let this normal operation add confusion to the actual concern. Perform normal diagnostics for the DTC set.

Correction

Caution

  • An owner may believe the rear wheels are stuck in the turned position when in fact this is normal operation.

    the passage
    An owner may believe that the rear wheels are stuck in the turned position when in fact this is normal operation.

Compiled by reading the full text of the document; each point stands on the passage shown. Check the document itself, linked below, before working on a vehicle.

Stated content

  1. Communication summary

    Quadrasteer のドッグトラック Quadrasteer（NYS）リアホイールステアリング付きの一部の 2002-05 Chevrolet および GMC フルサイズトラックおよびユーティリティの所有者から、フロントホイールがまっすぐになった後もリアホイールが切れたままになる、という指摘が出ることがある。 これには、DIC の Service 4 Wheel Steer メッセージ、および／または 4 Wheel Steer モジュールへの DTC の記録を伴うことがある。 旋回中に故障が検出されると、リアホイールステアリングモジュールはリアホイールを制御しながら中立位置に戻す。リアホイールが中立に戻るまで最大 30 秒かかることがある。 この 30 秒の間に、所有者がフロントホイールをまっすぐにしていても、リアホイールがまだ切れている（ドッグトラッキング）ことがありうる。 所有者はリアホイールが切れた位置で固着していると思うかもしれないが、実際にはこれは正常な作動である。 この正常な作動のせいで、本来の不具合の見きわめを混乱させないこと。記録された DTC について通常の診断を行う。 Machine translation (unreviewed)

    Quadrasteer Dog Track Owners of some 2002-05 Chevrolet and GMC full size trucks and utilities with Quadrasteer (NYS) Rear Wheel Steering may comment that the rear wheels stay turned even after the front wheels are straight. This may be accompanied by a Service 4 Wheel Steer message on the DIC and/or a DTC set in the 4 Wheel Steer module. When a fault is detected during a turn, the Rear Wheel Steering module will perform a controlled re-centering of the rear wheels. It may take up to 30 seconds for the rear wheels to center. During this 30 seconds, the owner may have straightened the front wheels and the rear wheels could still be turned (dog tracking). An owner may believe that the rear wheels are stuck in the turned position when in fact this is normal operation. Do not let this normal operation add confusion to the actual concern. Perform normal diagnostics for the DTC set.
    Go to this passage in the original

Source

Source
GM TechLink
Source reference
2005-04-51
Received by source
2005-04-01
Incident date
Unknown

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Manufacturer communication 2005-04-51 — 2002 GMC FULL SIZE TRUCKS AND UTILITIES (YUKON) | FaultCrate