Service Manuals, User Guides, Schematic Diagrams or docs for : . Car Manuals Acura 3.5RL 1996-2004 Approved srm RL9604S19204A

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             Main Menu                 Table of Contents



Troubleshooting Precautions


 System Indicators

    If the system is OK, the ABS indicator goes off once after turning the ignition switch ON (II) without starting the engine,
    and then come on again and go off several seconds later after starting the engine. This occurs because the VSA control
    unit is turned on by the IG2 power source.
    The ABS indicator or VSA system indicator comes on when the VSA control unit detects a problem in the system.
    The ABS indicator or VSA system indicator will also come on under these conditions, even though the system is oper-
    ating properly:
    -- The vehicle goes into a spin
    -- The ABS continues to operate for a long time
    -- The vehicle is subjected to an electrical signal disturbance
    If there is a fault in the PGM-FI system, only the VSA system indicator comes on.
    The VSA Activation Indicator will flash when only the drive wheels rotate or one of the drive wheels is stuck. When this
    occurs, the ABS indicator and VSA system indicator do not come on.
 To determine the actual cause of the problem, question the customer about the problem, taking these conditions into con-
 sideration.
    When a problem is detected and the ABS or VSA indicator comes on, there are cases when the indicator stays on until
    the ignition switch is turned OFF, and cases when the indicator goes off automatically when the system returns to nor-
    mal. For DTC 61 and 62, the indicator goes off automatically when the system returns to normal. For all other codes,
    the indicator stays on until the ignition switch is turned OFF.
    For DTCs 12, 14, 16, 18, 51, 52, 53, 66, 68 and 84, the ABS indicator goes off when the vehicle is driven again and the
    system is OK after the ignition switch is turned from OFF to ON (II). However, if the DTC is cleared, the CPU resets and
    the indicator goes off right after the engine is started if the system is OK.
    The ABS is not operational when the ABS indicator is ON; the VSA is not operational when the VSA indicator is ON.
    When the VSA indicator and MIL are both ON, troubleshoot the PGM-FI system first.

 Diagnostic Trouble Code (DTC)

    The memory can hold any number of DTCs. However, when the same DTC is detected more than once, the more recent
    DTC is written over the earlier one. Therefore, when the same problem is detected repeatedly, it is memorized as a sin-
    gle DTC.
    The DTCs are indicated in ascending number order, not in the order they occur.
    The DTCs are memorized in the EEPROM (non-volatile memory). Therefore, the memorized DTCs cannot be canceled
    by disconnecting the battery. Perform the specified procedures to clear the DTCs.

 Self-diagnosis

    Self-diagnosis can be classified into two categories:
    -- Initial diagnosis: Performed right after the engine starts and until the ABS or VSA indicator goes off.
    -- Regular diagnosis: Performed right after the initial diagnosis until the ignition switch is turned OFF.
    When a problem is detected by self-diagnosis, the VSA control unit shifts to fail-safe mode.

 Kickback

 The pump motor operates when the ABS is functioning, and the fluid in the reservoir is forced out to the master cylinder,
 causing kickback at the brake pedal.

 Pump Motor

    The pump motor operates when the ABS is functioning.
    The VSA control unit checks the pump motor operation during initial diagnosis when the vehicle is started.
    You may hear the motor operate at this time, but it is normal.

 Brake Fluid Replacement/Air Bleeding

 Brake fluid replacement and air bleeding procedures are identical to the procedures use on vehicles not equipped with
 VSA. To ease bleeding, start with the front wheels.
            Main Menu                 Table of Contents




Troubleshooting

The troubleshooting flowchart procedures assume that the cause of the problem is still present and the ABS indicator
and/or VSA system indicator is still on. Following the flowchart when the ABS indicator and/or VSA system indicator does
not come on can result in incorrect diagnosis.
The connector illustrations show the female terminal connectors with a single outline and the male terminal connectors
with a double outline.

1. Question the customer about the conditions when the problem occurs, and try to reproduce the same conditions for
   troubleshooting. Find out when the ABS indicator and/or VSA system indicator came on, such as during ABS control,
   after ABS control, when vehicle speed was at a certain speed, etc.

2. When the ABS indicator or VSA system indicator does not come on during the test drive, but troubleshooting is per-
   formed based on the DTC, check for loose connectors, poor contact of the terminals, etc. before you start troubleshoot-
   ing.

3. After troubleshooting, clear the DTC, and test drive the vehicle. Make sure the ABS indicator and VSA system indicator
   do not come on.

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