DIAGNOSIS
TSB Revision
KEYLESS OPERATION SYSTEM (KOS)
42B-71
STEP 2. Check the wiring harness between KOS-ECU
connector C-102 (terminal Nos. 6, 17 and 40) and outside
transmission antenna assembly (driver's side) connector
D-131 (terminal Nos. 3, 2 and 1).
• Check the communication, power supply, and ground wires
for open circuit.
NOTE: Also check intermediate connectors C-22 and C-32 for
loose, corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connectors C-22 and
C-32 is damaged, repair or replace the damaged component(s)
as described in GROUP 00E, Harness Connector Inspection
P.00E-2
.
Q: Is the wiring harness between KOS-ECU connector
C-102 (terminal Nos. 6, 17 and 40) and outside
transmission antenna assembly (driver's side)
connector D-131 (terminal Nos. 3, 2 and 1) in good
condition?
YES : Go to Step 3.
NO : The wiring harness may be damaged or the
connector(s) may have loose, corroded or damaged
terminals, or terminals pushed back in the connector.
Repair the wiring harness as necessary.
STEP 3. Keyless operation system communication test
Check that the communication with the outside transmission
antenna assembly (driver's side) is normal (Refer to Antenna
Test
P.42B-197
).
Antennas to be checked
Driver side antenna (exterior)
OK: Normal is displayed.
Q: Is the check result normal?
YES : Go to Step 4.
NO : Replace the outside transmission antenna assembly
(driver's side).
STEP 4. Check whether the diagnostic trouble code is
reset.
(1) Erase the diagnostic trouble code.
(2) Turn the ignition switch from the LOCK (OFF) position to the
ON position.
(3) Check if the diagnostic trouble code is set.
Q: Is the diagnostic trouble code set?
YES : Replace KOS-ECU and register the ID codes (Refer
to
P.42B-188
).
NO : Intermittent malfunction is suspected (Refer to
GROUP 00, How to Use Troubleshooting/Inspection
Service Points
− How to cope with Intermittent
Malfunction
P.00-15
).