Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
2006 Honda S2000 L4-2.2LFACTORY OEM SERVICE PROCEDURE
Information Bus: Testing and Inspection
F-CAN Circuit Troubleshooting
NOTE: Information marked with an asterisk (*) applies to the CAN Line.
1. Turn the ignition switch OFF.
2. Jump the SCS line with the HDS.
3. Disconnect ECM connector E (31P).
4. Disconnect HDS from the DLC.
5. Measure resistance between ECM connector terminals E11 and E24*.
Is there about 108 - 132 Ohm?
YES - Go to step 16.
NO - Go to step 6.
6. Disconnect the VSA modulator-control unit 47P connector.
7. Disconnect the steering angle sensor 5P connector.
8. Check for continuity between ECM connector terminal E11 and E24*.
Is there continuity?
YES - Repair short in the wires between the ECM connector terminals E11 and E24*.
NO - Go to step 9.
9. Connect ECM connector terminal E11 to body ground with a jumper wire.
10. Check for continuity between VSA modulator-control unit 47P connector terminal No. 11 and body ground.
Is there continuity?
YES - Go to step 11.
NO - Repair open in the wire between the ECM (E11) and the VSA modulator-control unit.
11. Check for continuity between steering angle sensor 5P connector terminal No. 4 and body ground.
Is there continuity?
YES - Go to step 12.
NO - Repair open in the wire between the ECM (E11) and the steering angle sensor.
12. Remove the jumper wire from ECM connector E (31P).
13. Connect ECM connector terminal E24 to body ground with a jumper wire.
14. Check for continuity between VSA modulator-control unit 47P connector terminal No. 15 and body ground.
Is there continuity?
YES - Go to step 15.
NO - Repair open in the wire between the ECM (E24) and the VSA modulator-control unit.
15. Check for continuity between steering angle sensor 5P connector terminal No. 2 and body ground.
Is there continuity?
YES - Replace the VSA modulator-control unit.
NO - Repair open in the wire between the ECM (E24) and the steering angle sensor.
16. Disconnect the VSA modulator-control unit47P connector.
17. Disconnect the steering angle sensor 5P connector.
18. Check for continuity between ECM connector terminal E11 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM connector terminals E11 and the VSA modulator-control unit, the steering angle sensor, or the DLC.
NO - Go to step 19.
19. Check for continuity between ECM connector terminal E24 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM connector terminal E24 and the VSA modulator-control unit, the steering angle sensor, or the DLC.
NO - Go to step 20.
20. Check for continuity between VSA modulator-control unit 47P connector terminal No. 47 and body ground.
Is there continuity?
YES - Go to step 21.
NO - Repair open in the wire between the VSA modulator-control unit (No. 47) and body ground (G303).
21. Check for continuity between steering angle sensor 5P connector terminal No. 1 and body ground.
Is there continuity?
YES - Go to step 22.
NO - Repair open in the wire between the steering angle sensor (No. 1) and body ground (G401).
22. Reconnect the VSA modulator-control unit 47P connector.
23. Connect the HDS.
24. Turn the ignition switch ON (II), and read the HDS.
Does the HDS identify the vehicle?
YES - Replace the steering angle sensor.
NO - Go to step 25.
25. Substitute a known-good ECM.
26. Turn the ignition switch ON (II), and read the HDS.
Does the HDS identify the vehicle?
YES - System is OK at this time. Replace the original ECM.
NO - Replace the VSA modulator-control unit.
NOTE: Information marked with an asterisk (*) applies to the CAN Line.
1. Turn the ignition switch OFF.
2. Jump the SCS line with the HDS.
3. Disconnect ECM connector E (31P).
4. Disconnect HDS from the DLC.
5. Measure resistance between ECM connector terminals E11 and E24*.
Is there about 108 - 132 Ohm?
YES - Go to step 16.
NO - Go to step 6.
6. Disconnect the VSA modulator-control unit 47P connector.
7. Disconnect the steering angle sensor 5P connector.
8. Check for continuity between ECM connector terminal E11 and E24*.
Is there continuity?
YES - Repair short in the wires between the ECM connector terminals E11 and E24*.
NO - Go to step 9.
9. Connect ECM connector terminal E11 to body ground with a jumper wire.
10. Check for continuity between VSA modulator-control unit 47P connector terminal No. 11 and body ground.
Is there continuity?
YES - Go to step 11.
NO - Repair open in the wire between the ECM (E11) and the VSA modulator-control unit.
11. Check for continuity between steering angle sensor 5P connector terminal No. 4 and body ground.
Is there continuity?
YES - Go to step 12.
NO - Repair open in the wire between the ECM (E11) and the steering angle sensor.
12. Remove the jumper wire from ECM connector E (31P).
13. Connect ECM connector terminal E24 to body ground with a jumper wire.
14. Check for continuity between VSA modulator-control unit 47P connector terminal No. 15 and body ground.
Is there continuity?
YES - Go to step 15.
NO - Repair open in the wire between the ECM (E24) and the VSA modulator-control unit.
15. Check for continuity between steering angle sensor 5P connector terminal No. 2 and body ground.
Is there continuity?
YES - Replace the VSA modulator-control unit.
NO - Repair open in the wire between the ECM (E24) and the steering angle sensor.
16. Disconnect the VSA modulator-control unit47P connector.
17. Disconnect the steering angle sensor 5P connector.
18. Check for continuity between ECM connector terminal E11 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM connector terminals E11 and the VSA modulator-control unit, the steering angle sensor, or the DLC.
NO - Go to step 19.
19. Check for continuity between ECM connector terminal E24 and body ground.
Is there continuity?
YES - Repair short in the wire between the ECM connector terminal E24 and the VSA modulator-control unit, the steering angle sensor, or the DLC.
NO - Go to step 20.
20. Check for continuity between VSA modulator-control unit 47P connector terminal No. 47 and body ground.
Is there continuity?
YES - Go to step 21.
NO - Repair open in the wire between the VSA modulator-control unit (No. 47) and body ground (G303).
21. Check for continuity between steering angle sensor 5P connector terminal No. 1 and body ground.
Is there continuity?
YES - Go to step 22.
NO - Repair open in the wire between the steering angle sensor (No. 1) and body ground (G401).
22. Reconnect the VSA modulator-control unit 47P connector.
23. Connect the HDS.
24. Turn the ignition switch ON (II), and read the HDS.
Does the HDS identify the vehicle?
YES - Replace the steering angle sensor.
NO - Go to step 25.
25. Substitute a known-good ECM.
26. Turn the ignition switch ON (II), and read the HDS.
Does the HDS identify the vehicle?
YES - System is OK at this time. Replace the original ECM.
NO - Replace the VSA modulator-control unit.
Factory Service Tools
Use the Manual With the Right Hardware
Pair factory procedures with proven DIY tools so the instructions are easier to execute.
Disclosure: Verified tool recommendations may earn an affiliate commission at no cost to you.
When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.