Mazda RX-8 Workshop Manual page 3422

Inspect both car-navigation unit
connector and wiring harness-side
connector terminals 1N and 1P for
poor connection (such as
damaged/pulled-out pins, corrosion).
Are all the pins normal?
4 Car-navigation unit connector (24-
pin) disconnected.
Measure the resistance between
terminal 1N and 1P at car-navigation
unit harness-side connector (24-pin)
while the audio control switch (Voice
recognition/hands-free switch, Mode
switch, Volume adjustment switch or
mute switch, Automatic band selector
switch) is selected.
Is the resistance within the specified?
5 Verify that the continuity between
terminal 1N and 1P (24-pin) at car-
navigation unit harness-side
connector while the audio control
switch (HF/TEL) is pressed.
Is there continuity?
Specification
50 ohms — 5 kilo-
ohms (Resistance
is changing
according to audio
switch pressed
position.)
If the car-navigation
No
unit connector is
wrong:
Replace the car-navigation
unit.
(See CENTER PANEL UNIT
REMOVAL/INSTALLATION).
(See CENTER PANEL UNIT
DISASSEMBLY/ASSEMBLY).
If the wiring harness-
side connector is
wrong:
Repair or replace the pins
and/or the connector.
YesGo to the next step.
No Inspect and repair the
following:
Audio control switch.
(See AUDIO CONTROL
SWITCH
Wiring harness between
car-navigation unit and
audio control switch for
open or short circuit).
YesTroubleshooting completed. (The system is
normal.)
Inspect and repair the following:
No
audio control switch
(See AUDIO CONTROL
SWITCH
Wiring harness between
car-navigation unit and
INSPECTION).
INSPECTION).