Mazda RX-8 Workshop Manual page 3249

Diagnostic procedure
STEP
1 INSPECT KEYLESS CONTROL MODULE POWER SUPPLY
FUSES
Are the keyless control module power supply
fuses normal?
2 INSPECT DOOR SWITCH INSTALLATION
Are the door switches installed securely?
*3 INSPECT IF MALFUNCTION IS IN WIRING HARNESS
(NO CONTINUITY BETWEEN FUSE BLOCK AND
KEYLESS CONTROL MODULE) OR ELSEWHERE
Turn the ignition switch to the ON position.
Measure the voltage at the following keyless
control module terminals:
Is the voltage B+?
*4 INSPECT IF MALFUNCTION IS IN WIRING HARNESS
(SHORT TO B+ BETWEEN FUSE BLOCK AND KEYLESS
CONTROL MODULE, OR BETWEEN KEYLESS CONTROL
MODULE AND GROUND) OR ELSEWHERE
Turn the ignition switch to the LOCK position.
Disconnect the keyless control module
connector.
Measure the voltage at the following keyless
Malfunction in wiring harness between keyless control
module and ground
INSPECTION
IG1 signal (terminal 2B)
B+ signal (terminal 2A)
ACTION
YesGo to the next step.
No Inspect for a short to ground in
circuit of blown fuse. Repair or
replace if necessary.
Install an appropriate amperage
fuse.
YesGo to the next step.
No Install the door switches securely,
then go back to Step 5 of KEYLESS
ENTRY SYSTEM PRELIMINARY
INSPECTION.
YesGo to the next step.
No Repair the wiring harness between
the fuse block and keyless control
module, then go to Step 8.
YesRepair the malfunctioning wiring
harness, then go to Step 8.
No Go to the next step.