Suzuki sq-416-420-625 Service Manual page 606

8G-18 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
DTC13 NO TRANSPONDER CODE TRANSMITTED OR COIL ANTENNA
OPENED/SHORTED
(a)
1
DESCRIPTION:
Immobilizer Control Module energizes the coil antenna when the ignition switch is ON and reads Transponder code
from the ignition key. When Immobilizer Control Module cannot read Transponder code from the ignition key even
when the coil antenna is energized, this DTC is set.
INSPECTION:
STEP
1 Does ignition key being used have built-in trans-
ponder? (See Fig. 1)
2 1) Disconnect coil antenna coupler with ignition
switch turned OFF.
2) Is there continuity between coil antenna cou-
pler terminals A and B?
(See Fig. 2)
3 Measure resistance between terminals of coil an-
tenna coupler and body ground. (See Fig. 3)
Is it X (infinity) f ?
4 1) With coil antenna coupler disconnected, dis-
connect Immobilizer Control Module coupler.
2) Measure resistance between coil antenna ter-
minals of Immobilizer Control Module coupler.
(See Fig. 4)
Is it X (infinity) f ?
5 Measure resistance between terminal A1 of Im-
mobilizer Control Module coupler and body
ground.
(See Fig. 5)
Is it X (infinity) f ?
6 Measure resistance between terminal A2 of Im-
mobilizer Control Module coupler and body
ground. (See Fig. 6)
Is it X (infinity) f ?
7 1) Connect coil antenna coupler.
2) Is there continuity between Immobilizer Con-
trol Module coupler terminals A1 and A2?
(See Fig. 7)
2
5
(f)
ACTION
3
(k)
(I)
YES
Go to Step 2. Replace ignition key with built-in trans-
ponder and follow "DIAGNOSTIC
FLOW TABLE" again.
Go to Step 3. Coil antenna open.
Go to Step 4. Coil antenna shorted to ground.
Go to Step 5. "(k)" wire shorted to "(l)"wire.
Go to Step 6. "(k)" wire shorted to ground.
Go to Step 7. "(I)" wire shorted to ground.
D "(k)" or "(I)" wire open.
Go to Step 8.
D Poor coil antenna-to-coupler.
4
1. Main fuse
2. Main relay
3. Immobilizer
Control Module
4. Coil antenna
5. To ECM / PCM
NO