DTC 66: VSA Pressure Sensor (Software)
- Check for DTCs with the HDS (see HOW TO RETRIEVE DTCS
).
Is DTC 91 or 92 indicated with DTC 66 at the same time?
YES -Troubleshoot DTC 91 or 92, and recheck.
NO -Go to step 2.
- Check BRAKE SWITCH in the VSA DATA LIST with the HDS.
Is the brake pedal position switch OFF with the brake pedal pressed?
YES -Go to step 3.
NO -Go to step 9.
- Check the No. 13 (20 A) fuse in the under-hood fuse/relay box.
Is the fuse OK?
YES -Reinstall the fuse, and go to step 4.
NO -Replace the fuse and recheck.
- Check the brake pedal position switch for the function and adjustment.
Is the switch OK and its adjustment OK?
YES -Go to step 5.
NO -Replace or adjust the brake pedal position switch.
- Measure voltage between brake pedal position switch 4P connector terminal No. 1 and body ground.Fig 1: Measuring Voltage Between Brake Pedal Position Switch 4P Connector Terminal No. 1 And Body Ground
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Is there battery voltage?
YES -Go to step 6.
NO -Repair open in the wire between the No. 13 (20 A) fuse in the under-hood fuse/relay box and the brake pedal position switch.
- Turn the ignition switch OFF, and jump the SCS line with the HDS.NOTE: This must be done to protect the powertrain control module (PCM) from damage.
- Disconnect PCM connector A (44P).
- Measure voltage between PCM connector terminal A8 and body ground.
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Is there battery voltage when the brake pedal is pressed?
YES -Check for a loose or poor terminal fit at terminal A8 of PCM connector A. If the connection is bad, fix the fit. If the fit is OK, replace the PCM (see PCM REPLACEMENT ).
NO -Repair open in the wire between the brake pedal position switch and the PCM (A8).
- Clear the DTCs with the HDS (see HOW TO RETRIEVE DTCS ).
- Turn the ignition switch OFF, then turn it ON (II), and press the brake pedal several times.
- Check for DTCs with the HDS (see HOW TO RETRIEVE DTCS
).
Does the ABS indicator come on, and is DTC 66 indicated?
YES -Go to step 12.
NO -The system is OK at this time.
- Check BRK PRESS in the VSA DATA LIST with the HDS.
Does BRK PRESS increase with the brake pedal pressed and decrease with the brake pedal released?
YES -Replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT REMOVAL AND INSTALLATION ).
NO -Check the brake lines for damage and leakage.