Vehicle Speed Signal Circuit Troubleshooting - Honda Civic 2002-2003 Service Manual

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Vehicle Speed Signal Circuit Troubleshooting
Special Tools Required:
Test Harness 07LAJ-PT3020A
Before testing, inspect the No.4 (1 OAI and No.1 0 (7.5AI
fuses in the under-dash fuse/relay box.
1. Disconnect the 3P connector from the vehicle
speed sensor (VSSI (AI.
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2. Connect the test harness only to the engine wire
harness.
3. Connect the RED test harness clip (BI to the positive
probe of an ohmmeter. Cover the white (C) and
green (01 test harness leads with protective tape (EI.
4. Check for continuity between the RED test harness
clip and body ground.
Is there continuity?
YES-Go to step 5.
NO-Repair open in the BLK wire between the VSS
and G101 .•
5. Connect the WHT test harness clip (BI to the
positive probe of a voltmeter, and connect the RED
test harness clip (CI to the negative probe.
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6. Turn the ignition switch ON (III.
Is there battery voltage?
YES-Go to step 7.
NO-Repair open in the BLK/YEL wire between the
VSS and the under-dash fuse/relay box .•
7. Disconnect the WHT test harness clip (B).
8. Connect the GRN test harness clip (D) to the
positive probe of a voltmeter.
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eV.
Is there 5 V or more?
YES--Go to step 9.
NO-Repair short or open in the BLU/WHT or WHT/
GRN wire between the VSS and the cruise control
unit, or the ECM .•
(conl'd)
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