change key battery GREAT WALL FLORID 2008 Service Manual

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not necessarily mean that engine start failure is due to a immobilizer system malfunction. The reasons for start-
ing engine failures are numerous, including factors like fuel, gas, fire, electricity, wires, etc. If the engine cannot
start, first check if the immobilizer system is working normally. This can be judged by looking at the flashing
theft deterrent indicator lamp which is located on the dashboard in front of the driver seat: Insert the key into the
lock cylinder and turn it to the "ON" position. If a legal key is used to start the engine, once the warning lamp is
connected to the ON end and the transponder is confirmed, the LED will remain unlit. Then when the ON end is
disconnected and the key is pulled out, the LED will shine for 0.25 s and darken for 4 s, as to act as a warning.
If an illegal key is used to start up the engine or there is something wrong with the system, the alarm indicator
lamp will shine for 0.25 s and darken for 4 s. If all is normal, then check the other parts of the engine. If abnor-
mal, first perform immobilizer system troubleshooting. A scanner can be used to judge if the immobilizer system
is working normally, but the precondition is that the scanner must be able to establish communication with the
theft deterrent controller.
1. If communication cannot be established, consider the following:
(a) Check whether the battery voltage is higher than 9 V
(b) Check whether the scanner plug is well contacted to the vehicle socket
(c) Use a multimeter to check whether the 7 pin of the OBD-II plug (diagnostic plug) is connected to the theft
deterrent controller's A7 pin
(d) Check whether the power supply of the theft deterrent controller is normal. (Use a multimeter to measure
whether the voltage of the theft deterrent controller's socket A1 pin and A2 pin is higher than 9 V)
(e) Then adopt the substitution method, which is to replace the theft deterrent controller to check if there is
anything wrong with the theft deterrent controller.
• If the failure is related to the theft deterrent controller, change it and initiate re-matching.
• If the failure has nothing to do with the theft deterrent controller, remove the electronic controller which
is connected to the alarm's K wire, such as the ABS controller, engine electrojet controller, airbag ECU
assembly, etc., as to ascertain if the present fault is caused by the wire harness connected with the theft
deterrent controller's K wire.
2. If communication can be established
Connect the scanner to the vehicle diagnostic port. Insert the key into the steering lock, and turn it to the "ON"
position, then select the scanner to check the immobilizer system's trou\
ble code.
3. Security system troubleshooting
Investigate the problem and perform troubleshooting according to the tro\
uble code on the scanner:
Trouble
code
Code
significanceFailure causeTroubleshooting methods
B1000Theft deterrent
controller
internal
malfunction
Theft deterrent coil open
circuit or short circuit. Theft
deterrent controller internal
malfunction.
Check whether the theft deterrent coil's connecting plug and 1.
the theft deterrent controller is well connected.
Check whether the theft deterrent coil's wire harness plug is sliding 2.
or touching each other.
R e m o v e t h e t h e f t d e t e r r e n t c o i l p l u g , a n d t h e n u s e a 3.
multimeter to check the resistance between the B1 and B2
pins. The normal resistance is about 5-30 Ω. If the resistance
is close to zero, that means the coil has been short circuited.
If the resistance is infinite, then it means the coil's circuit is
open. Measure the resistance between pins B1 and B3, and
B2 and B3, normally they are infinite. If the resistance gains
a certain value, then it means the coil is short circuited or
leaking electricity.
If there is nothing wrong with the coil, the next step is to 4.
check the theft deterrent controller. Adopt the substitution
approach, replace it with a non-matched new theft deterrent
controller or an theft deterrent controller which has been
reset (please refer to the immobilizer system component
replacement). Insert the key into the ignition lock and turn it
to the "ON" position and read the trouble code. If there is no
9000 failure, it means the replaced controller has an internal
malfunction, and the new replaced controller must be re-
matched.

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Trouble
code
Code
significanceFailure causeTroubleshooting methods
B3048The LED has
a short circuit
or open circuit
to the power
supply
The wire harness (A3
pin) connecting to the
immobilizer indicator
(LED) has short circuited to
the battery positive.
Check whether the theft deterrent controller's 8-core plug 1.
wire harness is touching each other.
Check whether the wire harness which connects the 8-core 2.
plug's A3 pin and the immobilizer indicator has short
circuited to the battery positive.
B3055Transponder
cannot
modulate
or without
transponder
No transponder inside the
key, transponder damage,
and the theft deterrent coil
damage will lead to theft
deterrent controller receiver
failure of the response
signal from the transponder.
Check whether there is transponder in the key.1.
Check whether the theft deterrent coil is correct as specified 2.
in Article 1.
Replace the transponder (please refer to immobilizer system 3.
component replacement).
B3056No key
message is
stored in the
theft deterrent
controller
The theft deterrent controller
hasn't been matched or
has no key duplicate, thus
there is no transponder
identification code stored
inside the theft deterrent
controller
Re-learn the keys.
B3057PIN is not
recognized
by the theft
deterrent
controller
The theft deterrent controller
is new or has been reset.
Set up the safety code and match the theft deterrent controller
again.
B3059No request
signal from
the electrojet
controller is
received
The theft deterrent
controller doesn't receive
the communication request
signal from the electrojet
controller.
Check whether the theft deterrent controller's 8-core plug is 1.
well connected.
Check whether the wire harness connecting the A5 pin (R 2.
wire) of the 8-core plug and electrojet is well connected, is
not short circuited, and is not poorly connected.
Replace the alarm (please refer to immobilizer system 3.
component replacement). Check whether the above failures
exists. If they do not, the fault most likely exists in the alarm.
Replace the electrojet (please refer to immobilizer system 4.
component replacement). Check whether the above failures
exists. If not, the fault most likely exists in the electrojet.
B3060Illegal key
message is
received
No transponder
identification code stored in
the theft deterrent controller.
Use the scanner to carry out the "learning keys" function.
B3061The
communication
with the key is
interrupted
The transponder
can not establish
communication with the
theft deterrent controller,
the communication
is interrupted, or the
communicating data is
incorrect. The electrojet
key is not identical to the
transponder's.
Check whether the theft deterrent coil is correct as specified 1.
in Article 1.
Check whether the transponder is new or not matching. 2.
Rematch it if it is not matched;
If the transponder has been matched, make sure to check 3.
whether the transponder has been changed, or the electrojet
changed or reset
• If the transponder has been changed, then it cannot be used
again, and must be replaced with a new one and then re-
matched
• If the transponder hasn't been changed and only the
electrojet has been reset, then it only needs to matched again.
• If the transponder has not been changed but the electrojet
has been changed, make sure the replacing electrojet
is new or has been reset. If the substituted electrojet is
matched but not yet reset, then it must be replaced with a
new or reset one and then re-matched.