Pickup 1997

Control Module


Removal & Installation

The R-ABS control module is the electronic heart of the system. It is located below the right-side dashboard and is connected to the R-ABS control harness.

The control module receives inputs from the ignition, the brake lamp switch, the wheel speed sensor, and the brake fluid level switch. It controls output to the hydraulic unit solenoid valves and the amber dash warning lamp.

The R-ABS module performs system tests and self-tests during start-up and normal operation. The solenoid valve, fluid level and speed sensor are monitored for correct operation. If a fault is found, the module will immediately disable the anti-lock function and light the amber ANTI-LOCK dash warning lamp.

The module will assign a fault code and store it in memory. The code may be retrieved by placing the system into diagnostic mode. Codes will only be displayed when the dash warning lamp is lit. A stored code will be erased when the ignition is switched OFF . If the problem exists when the engine is restarted, the self-check will note the fault and again set the code.

At this time the manufacturer does not provide removal and installation procedures for this component. The following procedure is a guideline and may differ from the vehicle you are servicing.

  1. Before servicing the vehicle, refer to the Precautions Section.
    If working near and/or around the SRS system and components, be sure to disable the SRS system. After disabling the system wait three minutes or more before servicing the vehicle. Disconnect the air bag module connector.

    Click image to see an enlarged view

    Fig. Air bag module connector location

  3. Disconnect the negative battery cable.
  5. Turn the ignition switch OFF .
  7. Remove the bolts holding the module to its bracket.
  9. Carefully disconnect the multi-pin harness from the module, then remove the module.

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    Fig. ABS control module and related components

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    Fig. ABS hydraulic circuit

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    Fig. ABS control module harness connectors

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    Fig. ABS control unit and related components


To install:

Be sure to use new fasteners, as required.

  1. Installation is the reverse of the removal procedure.
  3. Using the CONSULT-III diagnostic tool, or equivalent, perform the SRS self diagnostic test and any reconnect/relearn procedures, as required.