DTC 94: VSA-TCS Control Valve Sensor

NOTE: If the VSA system indicator and MIL are both ON, troubleshoot the PGM-FI system first.

Turn the ignition switch ON (II).
Measure the voltage between the VSA-TCS control valve sensor 3P connector terminal No. 1 and body ground.

Fig 1: Measuring Voltage Between VSA-TCS Control Valve Sensor 3P Connector Terminal No. 1 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
1. Is there about 5 V?
2. YES - Go to step 3.
3. NO - Repair open in the wire between the VSA control unit and the VSA-TCS control valve sensor.
Measure the voltage between the VSA-TCS control valve sensor connector terminals No. 1 and No. 3.

Fig 2: Measuring Voltage Between VSA-TCS Control Valve Sensor Connector Terminals No. 1 & No. 3
Courtesy of AMERICAN HONDA MOTOR CO., INC.
1. Is there about 5 V?
2. YES - Go to step 4.
3. NO - Repair open in the wire between the VSA control unit and the VSA-TCS control valve sensor.
Turn the ignition switch OFF.
Disconnect VSA control unit connector A (22P).
Check for continuity between the VSA-TCS control valve sensor 3P connector terminal No. 2 and body ground.

Fig 3: Checking Continuity Between VSA-TCS Control Valve Sensor 3P Connector Terminal No. 2 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
1. Is there continuity?
2. YES - Repair short to body ground in the wire between the VSA control unit and the VSA-TCS control valve sensor.
3. NO - Go to step 7.
Disconnect the VSA-TCS control valve actuator 2P connector.
Connect the VSA control unit connector A (22P) and VSA-TCS control valve sensor 3P connector.
Turn the ignition switch ON (II).
Connect battery power to the VSA-TCS control valve actuator 2P connector terminal No. 1 and ground connector terminal No. 2 for 1 second.
NOTE:
- Be careful not to short the terminals.
- After checking, disconnect the terminals.
Fig 4: Connecting Battery Power To VSA-TCS Control Valve Actuator 2P Connector Terminal No. 1 & Ground Connector Terminal No. 2
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Measure the voltage between the VSA control unit connector A (22P) terminal No. 2 and body ground.
NOTE:
1. VSA-TCS control valve is fully closed: about 0.5 V
2. VSA-TCS control valve is fully open: about 4.5 V
3. There should be a smooth transition from about 4.5 V to 0.5 V as the VSA-TCS control valve is closed.
Fig 5: Measuring Voltage Between VSA Control Unit Connector A (22P) Terminal No. 2 & Body Ground
Courtesy of AMERICAN HONDA MOTOR CO., INC.
1. Is the voltage within specification?
2. YES - The system is OK at this time. If the problem recurs, check for loose VSA control unit connectors. If necessary, substitute a known-good VSA control unit, and recheck.
3. NO - Check for an open in the wire between the VSA control unit and the VSA-TCS control valve sensor. If the wire is OK, replace the VSA-TCS control valve assembly (faulty VSA-TCS control valve sensor), and recheck.