Honda Fit/Jazz - Vehicle Speed Signal Circuit Troubleshooting
Vehicle Speed Signal Circuit Troubleshooting
Special Tools Required:
Test Harness( 07LAJ-PT30200)
M/T
Before testing, inspect the No. 3 (7.5A) fuses in the under-dash fuse/relay box.
1. | Disconnect the 3P connector from the vehicle speed sensor (VSS) (A).
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2. | Connect the test harness only to the engine wire harness.
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3. | Connect the RED test harness clip (B) to the positive prove of an ohmmeter. Cover the white (C) and green (D) test harness with protective tape (E).
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4. | Check for continuity between the RED test harness clip and body ground.
Is there continuity?
YES - Go to 5.
NO - Repair open in the BLK wire between the VSS and G101.n
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5. | Connect the WHT test harness clip (B) to the positive probe of a voltmeter, and connect the RED test harness clip (C) to the negative probe.
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6. | Turn the ignition switch ON (II).
Is there battery voltage?
YES - Go to 7.
NO - Repair open in the BLK/YEL wire between the VSS and the under-dash fuse/relay box.n
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7. | Disconnect the WHT test harness clip (B).
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8. | Connect the GRN test harness clip (D) to the positive probe of a voltmeter.
Is there 5 V or more?
YES - Go to 9.
NO - Repair short in the BLU/WHT wire between the VSS and the cruise control unit, or the ECM.n
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9. | Turn the ignition switch OFF.
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10. | Connect the other test harness connector (A) to the VSS (B).
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11. | Raise the front of the vehicle, and make sure it is securely supported.
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12. | Put the vehicle in neutral with the ignition switch ON (II).
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13. | Slowly rotate one wheel with the other wheel blocked.
Does voltage pulse from 0 to about 5 V or more?
YES - Go to 14.
NO - Replace the VSS.n
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14. | Disconnect the 40P connector ‘‘C'' from the gauge assembly.
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15. | Touch a probe to the BLU/YEL BLU/WHT wire, and connect it to body ground through a voltmeter.
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16. | Slowly rotate one wheel with the other wheel blocked.
Does the voltmeter indicate pulsing voltage?
YES - Replace the speedometer assembly.n
NO - Repair open in the BLU/YEL BLU/WHT wire between the VSS and the speedometer.n
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CVT
Before testing:
1. | Raise the vehicle, and make sure it is securely supported.
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2. | Disconnect the 40P connector ‘‘C'' from the gauge assembly.
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3. | Connect the C15 terminal to the positive probe of a voltmeter, and connect the negative probe to body ground. To prevent damage to the gauge assembly, lay the gauge assembly on a shop rag.
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4. | Put the vehicle in neutral with the ignition switch ON (II).
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5. | Slowly rotate (over 3 km/h (2 mph)) one wheel with the other wheel blocked.
Does voltage pulse from 0 to about 5 V or more?
YES - Replace the gauge assembly.n
NO - Turn the ignition switch OFF, and go to 6.
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6. | Connect the No. 9 terminal of the PCM 31P connector E to the positive probe of a voltmeter, and connect the negative probe to body ground.
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7. | Put the vehicle in neutral with the ignition switch ON (II).
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8. | Slowly rotate (over 3 km/h (2 mph)) on wheel with the other wheel blocked.
Does voltage pulse from 0 to about 5 V or more?
YES - Repair open in the BLU/YEL wire between the gauge assembly and the PCM.n
NO - Turn the ignition switch OFF, and go to 9.
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9. | Disconnect the 31P connector E from the PCM.
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10. | Check for continuity between No. 25 terminal and body ground.
Is there continuity?
YES - Repair short to ground in the BLU/YEL wire between the PCM and the gauge assembly.n
NO - Check for these problems:
- Bent, loose or corroded terminals.
- A faulty PCM.n
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Honda Fit/Jazz 02-05 Workshop Manual
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