Vehicle Speed Pulse (VSP) Check

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Honda Odyssey, 2003 Honda Odyssey, 2002 Honda Odyssey, 2001 Honda Odyssey, and 2000 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

Before testing, inspect the No. 6 (15A) fuse in the driver's under-dash fuse/relay box.

Start the engine.
Perform the Car Status test under "Unit Check" in the System Diagnosis Menu (see System Diagnosis Test ).
1. Is there vehicle speed pulse signal?
  1. YES: Replace the navigation unit.
  2. NO: Go to step 3.
Turn the ignition switch OFF.
Raise the front of the vehicle, and make sure it is securely supported.
Put the vehicle in neutral with the ignition switch ON (II).
Measure the voltage between body ground and navigation unit connector C (8P) terminal No. 6.

Fig 1: Measuring Voltage Between Body Ground & Navigation Unit Connector C (8P) Terminal No. 6
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Slowly rotate one wheel with the other wheel blocked.
1. Does voltage pulse from 0 to approx. 5 V?
  1. YES: Replace the navigation unit.
  2. NO:
    1. 2002-04 models: Go to step 8.
    2. 2000-01 models: Go to step 9 .
Check the speedometer and cruise control.
1. Does the speedometer and cruise control function normally?
  1. YES: Repair open or short in the wire between the PCM and the navigation unit.
  2. NO: Troubleshoot the VSS circuit.
Turn the ignition switch OFF.
Disconnect the 3P connector from the vehicle speed pulse (VSP) sensor (A).

Fig 2: Disconnecting 3P Connector From Vehicle Speed Pulse (VSP) Sensor
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Connect the test harness only to the engine wire harness.
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).
Check for continuity between the RED test harness clip and body ground.
1. Is there continuity?
  1. YES: Go to step 14.
  2. NO: Repair open in the BLK wire between the VSP and G101.
Connect the WHT test harness clip (A) to the positive probe of a voltmeter, and connect the RED test harness clip (B) to the negative probe.

Fig 3: Connecting WHT Test Harness Clip
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Turn the ignition switch ON (II).
1. Is there battery voltage?
  1. YES: Go to step 16.
  2. NO: Repair open in the BLK/YEL wire between the VSP and the driver's under-dash fuse/relay box.
Turn the ignition switch OFF.
Disconnect the navigation unit connector C (8P) from the navigation unit.
Disconnect the WHT and RED test harness clips.
Connect the GRN test harness clip (A) to the positive probe of the ohmmeter.
Check for continuity between the GRN test harness clip and body ground.
1. Is there continuity ?
  1. YES: Repair short in the BLU/WHT wire between the VSP and the navigation unit.
  2. NO: Go to step 21.
Reconnect the navigation unit connector C (8P).
Turn the ignition switch ON (II).
Connect the GRN test harness dip (A) to the positive probe of a voltmeter, and connect the RED test harness clip (B) to negative probe.
1. Is there 5 V?
  1. YES: Replace the VSP.
  2. NO: Repair open in the BLU/WHT wire between the VSP and the navigation unit.