Mitsubishi L200. Manual - part 666
IMMOBILIZER SYSTEM
CHASSIS ELECTRICAL
54A-31
DIAGNOSIS CODE PROCEDURES
Code No.B1702: Reception error of key ID
CAUTION
Whenever the ECU is replaced, ensure that the
input and output signal circuits are normal.
OPERATION
The key reminder switch (ignition key ring antenna)
supplies the ignition key with power, and the ignition
key sends the key ID to the ETACS-ECU. ETACS-
ECU receives the key ID with the key ring antenna,
and judges if the ignition key is the registered one.
TROUBLE JUDGMENT
• Diagnosis code No.B1702 is stored when there
are other ignition keys or anything that interferes
with the communication (things that generate
radio waves such as magnets and an air-cleaning
device that has a power plug) near the ignition
key that is going to start the engine.
• If the key ID is not sent to the ETACS-ECU even
when the ignition switch is turned to the ON posi-
tion, diagnosis code No.B1702 is stored.
NOTE: Diagnosis code No.B1702 is always set
along with MPI system diagnosis code No.P0513.
PROBABLE CAUSES
• Interference of the key ID
• Malfunction of the key ring antenna (antenna
wire)
*
NOTE:
*
: The code No. B1722 will be set if a trouble
occurs in the key ring antenna.
• Malfunction of ignition key
• Malfunction of ETACS-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check the diagnosis code No.B1722 is
set.
Q: Is the diagnosis code No.B1722 set?
YES :
Refer to
.
NO :
Go to Step 2
STEP 2. Check the ignition key inserted in the
key cylinder for interference.
Q: Are there other ignition keys or anything that
interferes with the communication (things that
generate radio waves such as magnets and an air-
cleaning device that has a power plug) near the
ignition key inserted in the key cylinder?
YES :
Move away or remove other ignition keys or
things that interfere with the communication
(things that generate radio waves such as
magnets and a air-cleaning device that has
a power plug) near the ignition key. Then,
go to step 4.
NO :
Go to Step 3
STEP 3. Check with the spare key that has
already been registered.
Check that the engine starts using the spare key that
has already been registered.
Q: Is diagnosis code No.B1702 set?
YES :
Replace the ETACS-ECU and register the
ID codes again (Refer to
). After
registering the ID codes, go to Step 4.
NO :
Replace the ignition key for which diagnosis
code No.B1702 is set, and register the ID
codes again (Refer to
). After
registering the ID codes, go to Step 4.
STEP 4. Check whether the diagnosis code is
reset.
(1) Turn the ignition switch to the "LOCK" (OFF)
position once, and then turn it to the ON position
again.
(2) On completion, check that diagnosis code
No.B1702 is not reset.
Q: Is diagnosis code No.B1702 set?
B1761
Chassis No. not recorded
B1766
Transponder registered for other vehicle
U1073
Bus off
Refer to ETACS
.
Code No.
Diagnosis contents
Reference page