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8G-16 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
1. Main fuse
2. Main relay
3. ECM / PCM
4. Immobilizer indicator lamp
(Vehicle not equipped with
monitor coupler) For G16 / J20 engine For H25 engine
G16 / J20 Engine
H25 Engine
TABLE C IMMOBILIZER INDICATOR LAMP CHECK
(IMMOBILIZER INDICATOR LAMP REMAINS ON AFTER ENGINE
STARTS)
STEPACTIONYESNO
11) With ignition switch OFF, disconnect
couplers from ECM / PCM.
Does immobilizer indicator lamp turn ON
at ignition switch ON?ª(p)º wire shorted to
ground circuit.Substitute a known-good ECM /
PCM and recheck.
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8G-18 IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED)
12
3
4
1. Main fuse
2. Main relay
3. Immobilizer
Control Module
4. Coil antenna
5. To ECM / PCM 5 (a)
(f)(k)
(I)
DTC13 NO TRANSPONDER CODE TRANSMITTED OR COIL ANTENNA
OPENED/SHORTED
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:
STEPACTIONYESNO
1Does ignition key being used have built-in trans-
ponder? (See Fig. 1)Go to Step 2.Replace ignition key with built-in trans-
ponder and follow ªDIAGNOSTIC
FLOW TABLEº again.
21) 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)Go to Step 3.Coil antenna open.
3Measure resistance between terminals of coil an-
tenna coupler and body ground. (See Fig. 3)
Is it (infinity) ?Go to Step 4.Coil antenna shorted to ground.
41) 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 (infinity) ?Go to Step 5.ª(k)º wire shorted to ª(l)ºwire.
5Measure resistance between terminal A1 of Im-
mobilizer Control Module coupler and body
ground.
(See Fig. 5)
Is it (infinity) ?Go to Step 6.ª(k)º wire shorted to ground.
6Measure resistance between terminal A2 of Im-
mobilizer Control Module coupler and body
ground. (See Fig. 6)
Is it (infinity) ?Go to Step 7.ª(I)º wire shorted to ground.
71) Connect coil antenna coupler.
2) Is there continuity between Immobilizer Con-
trol Module coupler terminals A1 and A2?
(See Fig. 7)Go to Step 8.ª(k)º or ª(I)º wire open.
Poor coil antenna-to-coupler.
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IMMOBILIZER CONTROL SYSTEM (IF EQUIPPED) 8G-21
12
3
1. Main fuse
2. Ignition switch
3. Immobilizer
Control Module (g)
A4
DTC22 IGNITION SWITCH CIRCUIT OPEN / SHORT
DESCRIPTION:
Immobilizer Control Module monitors ignition signal when the ignition switch is ON. This DTC is set when no ignition
signal input is detected by Immobilizer Control Module.
INSPECTION:
STEPACTIONYESNO
1Check voltage between Immobilizer
Control Module coupler terminal A4
and body ground with ignition
switch turned ON.
(See Fig.1)
Is it 10 ± 14V?Poor A4 terminal connection.
If connection is OK, substitute a
known-good Immobilizer Control
Module and recheck.
NOTE:
After replacing with a know-good
Immobilizer Control Module,
register ECM/Immobilizer Control
Module code in ECM / PCM and
Transponder code and ECM/
Immobilizer Control Module code
in Immobilizer Control Module by
performing procedure described
in ªProcedure after Immobilizer
Control Module Replacementº
section.ª(g)º wire open or short.
Fig. 1 for Step 1
1
A4
1. Immobilizer Control Module
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WIRE HARNESS COLOR
B : Black
B/W : Black/White
Bl : Blue
Bl/B : Blue/Black
Bl/R : Blue/Red
Br : BrownG : Green
Gr : Gray
G/R : Green/Red
Lg : Lightgreen
P : Pink
V : VioletY : Yellow
Y / G : Yellow/Green
Y/R : Yellow/Red
W : White
W/B : White/Black
1. From main fuse
2. Ignition switch
3. ªIG
.COIL METERº fuse in J/B
4. ªAIR BAGº warning lamp in combination meter
5. ªAIR BAGº fuse in ªAIR BAGº fuse box
6. Connection detection pin
7. To ECM (or PCM), ICM (if equipped) and ABS
controller (if equipped)
8. To data link connector (DLC)
9. ªAIR BAGº monitor coupler
10. SDM
11. Contact coil assembly
12. Driver air bag (inflator) module
13. Driver seat belt pretensioner (if equipped)
14. Passenger air bag (inflator) module
15. Passenger seat belt pretensioner (if equipped)
16. Pretensioner harness (if equipped)
17. Ground for air bag system
TERMINAL
A1
A2
A3
A4
A5
A6
A7
A8
A9
A10
A13 A11
A12
A14
A15
A16
Passenger air bag (inflator) moduleLow
High
CIRCUIT
Data link connector (DLC)
Low
High
Low
High
Low
High ªAIR BAGº warning lamp
Driver air bag (inflator) module
Diagnosis switch
±±±±±±±±±
Ground
Passenger pretensioner
Driver pretensioner
Ignition switch (power source)±±±±±±±±±
±±±±±±±±±
CONNECTOR ªAº (SDM connector) TERMINAL ARRANGEMENT OF SDM
(VIEWED FROM HARNESS SIDE)
L1
L2Connection detection pin
: Shorting bar
: Air bag harness
ªAº ªHº : Connector
AIR BAG SYSTEM 10B-5
SYSTEM WIRING DIAGRAM
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7. SDM
7-1. ªAIR BAGº warning lamp driver circuit 4. ªAIR BAGº warning lamp in combination meter
5. ªAIR BAGº fuse in ªAIR BAGº fuse box
6. Connection detection pin 1. From main fuse
2. Ignition switch
3. ªIG
.COIL METERº fuse in J/B: Air bag harness
10B-16 AIR BAG SYSTEM
TABLE A ± ªAIR BAGº WARNING LAMP COMES ªONº STEADY (Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
STEPACTIONYESNO
11) Ignition switch OFF.
2) Remove and inspect ªAIR BAGº fuse.
3) Is fuse good?Go to step 2.ªBI/Rº wire short to ground.
After repair, replace
ªAIR BAGº fuse.
21) Disconnect SDM.
2) Check proper connection to SDM at
terminal ªA16º.
3) If OK then check voltage between ªA16º
terminal of SDM connector and body
ground with ignition switch ON.
4) Is it 8 V or more?Go to step 3.ªBI/Rº wire (between
ªAIR BAGº fuse and SDM
connector) open ªBI/Bº wire
(between ignition switch and
ªAIR BAGº fuse) open or short
to ground.
31) Disconnect 16p connector from
combination meter, referring to Section
8C.
2) Check resistance between ªA5º terminal
of SDM connector and body ground.
3) Is resistance 1 k or more?Substitute a known-
good SDM and
recheck.ªBIº wire (between combina-
tion meter and SDM connec-
tor) short to ground.
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7. SDM
7-1. ªAIR BAGº warning lamp driver circuit 4. ªAIR BAGº warning lamp in combination meter
5. ªAIR BAGº fuse in ªAIR BAGº fuse box
6. Connection detection pin 1. From main fuse
2. Ignition switch
3. ªIG
.COIL METERº fuse in J/B: Air bag harness
10B-18 AIR BAG SYSTEM
TABLE B ± ªAIR BAGº WARNING LAMP DOES NOT COME ªONº (Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
STEPACTIONYESNO
11) Set parking brake.
2) Note combination meter as ignition switch
is turned ON.
3) Does the ªBRAKEº indicator (warning lamp)
come ON?Go to step 2.ªB/Wº wire, ªIG.COIL
METERº fuse or J/B
(between ignition
switch and combination
meter) open or short to
ground.
21) With ignition switch OFF, disconnect SDM.
2) Check electrical connection check
mechanism (connection detection pin).
3) Is it in good condition?Go to step 3.Repair electrical
connection check
mechanism.
31) Disconnect SDM.
2) Check proper connection to SDM at
terminal ªA5º.
3) If OK then check voltage from ªA5º terminal of
SDM connector to body ground with ignition
switch ON.
4) Is it 9 V or more?Substitute a known-good
SDM and recheck.Go to step 4 on the
next page.
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1. From main fuse
2. Ignition switch
3. ªIG
.COIL METERº fuse in J/B
4. ªAIR BAGº warning lamp in combination meter7. Connection detection pin
8. SDM
8-1. ªAIR BAGº warning lamp driver circuit -5. ªAIR BAGº fuse in ªAIR BAGº fuse box
-6. ªAIR BAGº monitor coupler
6-1. Diagnosis switch terminal : Air bag harness
6±1 6
10B-20 AIR BAG SYSTEM
TABLE C ± ªAIR BAGº WARNING LAMP FLASHES (Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
STEPACTIONYESNO
11) Check ªAIR BAGº monitor coupler.
2) Is it connected diagnosis switch terminal and
ground terminal in ªAIR BAGº monitor coupler
by service wire?Remove service wire.Go to step 2.
21) With ignition switch OFF, disconnect SDM.
2) Measure resistance between ªA8º terminal of
SDM connector and body ground.
3) Is resistance 1 k or more?Substitute a known-good
SDM and recheck.Repair short from ªVº
wire circuit to ground.
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1. From main fuse
2. Ignition switch
3. ªIG
.COIL METERº fuse in J/B
4. ªAIR BAGº warning lamp in combination lamp
5. ªAIR BAGº fuse in ªAIR BAGº fuse box6. DLC
7. To, ICM (if equipped)
8. Connection detection pin
9. SDM
9-1. ªAIR BAGº warning lamp driver circuit : Air bag harness
10B-22 AIR BAG SYSTEM
TABLE D ± SDM CANNOT COMMUNICATE THROUGH THE SERIAL DATA CIRCUIT
(Page 1 of 2)
CAUTION:
When measurements are requested in this chart use specified digital multimeter with correct terminal
adapter from special tool (Connector test adapter kit).
When a check for proper connection is requested refer to ªIntermittent and Poor Connectionsº in this
section.
When an open in air bag wire harness, damaged wire harness, connector or terminal is found, replace
wire harness, connectors and terminals as an assembly.
STEPACTIONYESNO
11) Make sure that scan tool (Tech 1) is free
from malfunction and correct cartridge for
air bag system is used.
2) Ignition switch OFF.
3) Check proper connection of scan tool
(Tech 1) to DLC.
4) Is connection in good condition?Go to step 2 on
next page.Properly connect scan
tool to DLC.
