Inspection Procedure

CHECK IT OPERATION AGAIN
1. Turn the ignition switch from OFF to ON, and check that the malfunction is cleared.
  Standard: Malfunction disappear.
NOTE: Even if the system works correctly, the following conditions may be seen, vehicle position mark turns, or the map turns unwillingly. (It is because by turning the IG switch to ACC or ON during turning, navigation system, stores based on the angular speed) In that case, turn the IG switch from OFF to ACC or ON to return the correct function.
1. OK: NORMAL
2. NG: Go to Next Step
NAVIGATION CHECK MODE (VEHICLE SIGNAL CHECK)
1. Perform vehicle signal check of navigation check mode.
  1. Start up the diagnosis system and read of SPD signal in vehicle sensors.
  Standard: Input signal is normal (SPD).
1. OK: CHECK AND REPLACE NAVIGATION RECEIVER ASSY
2. NG: Go to Next Step
INSPECT NAVIGATION RECEIVER ASSY (SPD,E)

Fig 1: Measuring Voltage Between Terminal SPD & E Of Navigation Receiver Assy
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Remove the navigation receiver assy with connectors being connected.
2. Check voltage.
  1. Shift the shift lever to neutral.
  2. Jack up one of the front wheel.
  3. Turn the ignition switch to ON.
  4. Measure voltage between terminals SPD and E of navigation receiver assy when the front wheel are turned slowly.
  Standard: Voltage is generated intermittently.
  
  Fig 2: Identifying Navigation Receiver Assy Terminals Voltage Graph
  Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
3. Check continuity.
  1. Check that the continuity exists between terminal E of navigation receiver assy and body ground.
  Standard: Continuity exists.
1. OK: CHECK AND REPLACE NAVIGATION RECEIVER ASSY
2. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR