Honda 2004 Odyssey Service Manual page 2052

Vehicle position wanders on the map
NOTE:
• Always check the connectors for poor connections or
loose terminals.
• Before troubleshooting, write down the customer's
radio station presets, and get the radio and
navigation system anti-theft codes.
• After troubleshooting, enter the radio and navigation
system anti-theft codes, and the radio station presets.
Vehicle Speed Pulse (VSP) Check
Before testing, inspect the No. 6 (15A) fuse in the driver's
under-dash fuse/relay box.
1. Start the engine.
2. Perform the Car Status test under ''Unit Check'' in
the System Diagnosis Menu (see page 22-376).
Is there vehicle speed pulse signal?
YES Replace the navigation unit.
NO Go to step 3.
3. Turn the ignition switch OFF.
4. Raise the front of the vehicle, and make sure it is
securely supported.
5. Put the vehicle in neutral with the ignition switch
ON (II).
6. Measure the voltage between body ground and
navigation unit connector C (8P) terminal No. 6.
NAVIGATION UNIT CONNECTOR C (8P)
Wire side of female terminals
VSP
7. Slowly rotate one wheel with the other wheel
blocked.
Does voltage pulse f rom 0 to approx. 5 V ?
YES Replace the navigation unit.
NO '02-04 models: Go to step 8.
'00-01 models: Go to step 9.
8. Check the speedometer and cruise control.
Does the speedometer and cruise control f unction
normally?
YES Repair open or short in the wire between the
PCM and the navigation unit.
NO Troubleshoot the VSS circuit.
9. Turn the ignition switch OFF.
10. Disconnect the 3P connector from the vehicle
speed pulse (VSP) sensor (A).
07LAJ-PT3020A
A
11. Connect the test harness only to the engine wire
harness.
12. Connect the RED test harness clip (B) to the positive
probe of an ohmmeter, and the negative probe to
body ground. Cover the white (C) and green (D) test
harness with protective tape (E).
B
C
D
E
(cont'd)
22-373