CI-222 Vehicle Speed Signal

Condition:

Speedometer:

- The combined instrument panel registers a vehicle speed signal (input signal) exceeding 2,000 Hz, corresponding to approx. 280 km/h (174 mph).

Possible Source:
- Lose connections in signal cable/connectors.
- Signal cable insulation damaged.
- The signal cable is too close to a source of interference.
- High contact resistance.

Fault Symptom(s):
- Speedometer reading too small or maximum reading.

Start fault-tracing with step 1, below.

1) Checking Other Diagnostic Trouble Codes (DTCs):

Ignition On:

- Ignition on.

- Read off diagnostic trouble codes (DTCs) in combined instrument panel.
- Is diagnostic trouble code (DTC) CI - 221 stored?

Yes: Go to step 2, below.
No: Go to step 3, below.

2) Diagnostic Trouble Code (DTC) CI-221 Stored:
Fault-trace according to "CI - 211, D+ Signal". CI-211 D+ Signal

3) Status Check:

Engine Running:

- Start engine.

- Test drive the car at speeds above 20 km/h (12 mph), or lift up the front suspension and remove both front wheels.

WARNING: Test drive cars with AWD at a speed above 20 km/h (12 mph), or lift up the front and rear suspension and remove all wheels.

NOTE:
- When the rear wheels are stationary and the front wheels rotate, diagnostic trouble codes (DTCs) may be stored in the ABS system. Erase any diagnostic trouble codes (DTCs) stored in the ABS system after fault-tracing.
- Ensure that the front wheels are not rotating when the gear selector is moved.

- Go into scrolling values.

- Read off speed.
- Is the speed displayed within its permitted range?

Yes: Go to step 8, below.
No: Go to step 4, below.

4) Checking Cables and Terminals:

- Check combined instrument panel connector A, connector 24/130 and ABS control module connector for loose connections.
- Check cable between combined instrument panel # A3 and ABS control module # 6 for an intermittent open-circuit, an intermittent short-circuit to ground and an intermittent short- circuit to supply voltage.
- To perform above stated checks, Permanent Fault
- Was a fault detected in cables and terminals?

Yes: Go to step 6, below.
No: Go to step 5, below.

5) Checking for Interference:
- Check that the signal cable is not too close to sources of interferences such as electric motors, ignition cables and cell phone cables.
- Then continue with step 6, below.

6) Verification:

Note: After carrying out the repair check that the fault has been remedied.

- Ignition off.

Connect Connector:

- Reconnect connectors, reinstall components.

Engine Running:

- Start engine.

- Read off speed.
- Is the speed displayed within its permitted range?

Yes: The fault is corrected.
No: Go to step 7, below.

7) Fault-Tracing Information:
- The verification result shows that the fault persists.
- Do you want to quit fault-tracing?

Yes: The fault is not corrected!
No: Go back to step 1, above.

8) Faulty Signal, Intermittent Fault:

- Check combined instrument panel connector A, connector 24/130 and ABS control module connector for loose connections. Also, check cable between combined instrument panel # A3 and ABS control module # 6 for an intermittent open-circuit, an intermittent short-circuit to ground and an intermittent short-circuit to supply voltage.
- To perform above stated checks, Intermittent Fault
- Then continue with step 9, below.

9) Fault-Tracing Information:
- For intermittent faults fault-tracing is not followed by a verification because the fault is not present at this moment.
- Do you want to repeat fault-tracing?

Yes: Go to step 1, above.
No: Operation done