Acura TSX / Honda Accord CL. Manual — part 289

ABS INDICATOR CIRCUIT TROUBLESHOOTING

ABS INDICATOR DOES NOT COME ON

1. Turn the ignition switch ON (II), and watch the ABS indicator.

Does the ABS indicator come on for several seconds?

YES: The system is OK at this time.

NO: Go to step 2.

2. Apply the parking brake.

Does the brake system indicator come?

YES: Go to step 3.

NO: Repair open in the indicator power source circuit.

3. Turn the ignition switch OFF.

4. Substitute a known-good VSA modulator-control unit (see VSA MODULATOR-CONTROL UNIT

REMOVAL & INSTALLATION ).

5. Turn the ignition switch ON (II).

Does ABS indicator come on?

YES: Replace the VSA modulator-control unit (see VSA MODULATOR-CONTROL
UNIT REMOVAL & INSTALLATION ).

NO: Do the troubleshooting for the gauge control module (see SELF-DIAGNOSTIC
PROCEDURE ).

ABS INDICATOR DOES NOT GO OFF & NO DTCS ARE STORED

1. Check the No. 18 (40A) fuse in the under-hood fuse/relay box.

Is the fuse OK?

YES: Reinstall the fuse, and go to step 2.

NO: Replace the fuse, and recheck. If the fuse is blown, check for a short to body ground in
this fuse circuit. If the circuit is OK, replace the VSA modulator-control unit (see VSA
MODULATOR-CONTROL UNIT REMOVAL & INSTALLATION ).

2. Check the No. 18 (15A) fuse in the under-dash fuse/relay box.

Is the fuse OK?

YES: Reinstall the fuse, and go to step 3.

NO: Replace the fuse, and recheck. If the fuse is blown, check for a short to body ground in
this fuse circuit. If the circuit is OK, replace the VSA modulator-control unit (see VSA
MODULATOR-CONTROL UNIT REMOVAL & INSTALLATION ).

3. Turn the ignition switch OFF.

4. Disconnect the VSA control unit 47P connector.

5. Measure the voltage between the VSA control unit 47P connector terminal No. 1 and body ground.

Is there battery voltage?

YES: Go to step 6.

2004 Acura TSX

2004 BRAKES Vehicle Stability Assist System - TSX

NO: Repair open in the wire between the No. 18 (40A) fuse and the VSA control unit.

Fig. 65: Measuring The Voltage Between The VSA Control Unit 47P Connector Terminal No.
1 & Body Ground

6. Turn the ignition switch ON (II).

7. Measure the voltage between the VSA control unit 47P connector terminal No. 38 and body ground.

Is there battery voltage?

YES: Go to step 8.

NO: Repair open in the wire between the No. 18 (15A) fuse and the VSA control unit.

2004 Acura TSX

2004 BRAKES Vehicle Stability Assist System - TSX

Fig. 66: Measuring The Voltage Between The VSA Control Unit 47P Connector Terminal No.
38 & Body Ground

8. Turn the ignition switch OFF.

9. Check for continuity between the VSA control unit 47P connector terminal No. 32 and body ground.

Is there continuity?

YES: Check for loose terminals in the VSA control unit 47P connector. If necessary,
substitute a known-good VSA modulator-control unit (see VSA MODULATOR-
CONTROL UNIT REMOVAL & INSTALLATION ), and recheck.

NO: Repair open in the wire between the VSA control unit and body ground (G203).

2004 Acura TSX

2004 BRAKES Vehicle Stability Assist System - TSX

Fig. 67: Checking For Continuity Between The VSA Control Unit 47P Connector Terminal
No. 32 & Body Ground

BRAKE SYSTEM INDICATOR CIRCUIT TROUBLESHOOTING

BRAKE SYSTEM INDICATOR DOES NOT COME ON

1. With the parking brake applied, turn the ignition switch ON (II), and watch the brake system indicator.

Does the brake system indicator come on?

YES: Go to step 3 .

NO: Go to step 2.

2. Turn the ignition switch OFF then ON (II) again.

Does the ABS indicator come on for several seconds?

YES: Replace the gauge control module (see page GAUGE CONTROL MODULE

2004 Acura TSX

2004 BRAKES Vehicle Stability Assist System - TSX