Daewoo Matiz (2003 year). Manual — part 220

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 61

DTC 25 – Warning Lamp Failure

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Step

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Action

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Value(s)

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Yes

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Turn the ignition ON.
Is the warning lamp constantly ON?

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–

ÁÁÁÁÁÁÁ

Go to Step 2

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Go to Step 9

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Make sure the SDM connector is attached correctly.
Does the warning lamp turn OFF?

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–

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Go to

Diagnostic

System Check

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Go to Step 3

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1. Check for indications of the diagnostic trouble

code (DTC) other than the code 25.

2. Go to the appropriate DTC charts and repair each

additional problem.

3. Do the diagnostic system check.
Does the scan tool still indicate the code 25?

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–

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Go to Step 4

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System OK

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Check for a short to ground between the SDM and
the warning lamp using the following method:
1. Turn the ignition OFF.
2. Disconnect the connector C208.
3. Connect one ohmmeter lead to ground.
4. Touch the other ohmmeter lead to the terminal 3

of the connector C208 on the instrument harness
side.

Refer to ‘‘Diagnostic Illustration 14’’ in this
section.

Does the ohmmeter indicate the specified value?

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∞

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Go to Step 6

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Go to Step 5

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Repair the short to ground in the instrument
harness.
Is the repair complete?

ÁÁÁÁÁ

–

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Go to

Diagnostic

System Check

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–

ÁÁÁÁ

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1. The connector C208 remains disconnected.
2. One lead of the ohmmeter remains connected to

ground.

3. Move the ohmmeter lead at the connector C208

to the SDM side of the connector.

Refer to ‘‘Diagnostic Illustration 13’’ in this
section.

Does the ohmmeter indicate the specified value?

ÁÁÁÁÁ

∞

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Go to Step 7

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Go to Step 8

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Replace the SDM.
Is the repair complete?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

Go to

Diagnostic

System Check

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–

ÁÁÁÁ

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1. Disconnect the negative battery cable.
2. Replace the SIR wiring harness.
3. Do the diagnostic system check.
Does the code 25 still show?

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–

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Go to Step 5

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System OK

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

Check the fuse F1.
Is the fuse F1 blown?

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–

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Go to Step 10

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Go to Step 11

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1. With the connector C208 temporarily

disconnected, check for a short to ground
between the fuse F1 and the warning lamp.

2. Make a repair, if needed.
3. Replace the fuse F1.
Is the repair complete?

ÁÁÁÁÁ

–

ÁÁÁÁÁÁÁ

Go to

Diagnostic

System Check

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–

8B – 62 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

DTC 25 – Warning Lamp Failure (Cont’d)

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Step

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Action

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Value(s)

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Yes

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1. Turn the ignition ON.
2. Using a multimeter, check the voltage at the fuse

F1.

Does the multimeter show the specified value?

ÁÁÁÁÁ

11–14 v

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Go to Step 13

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Go to Step 12

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Repair the open power supply circuit for the fuse F1.
Is the repair complete?

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–

ÁÁÁÁÁÁÁ

Go to

Diagnostic

System Check

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–

ÁÁÁÁ

ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Disconnect the connector C208.
2. Turn the ignition ON.
3. Using a multimeter, check the voltage on the

instrument harness side of the terminal 3 of the
connector C208.

Does the multimeter show the specified value?

ÁÁÁÁÁ

11–14 v

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Go to Step 15

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Go to Step 14

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1. Check the warning lamp bulb.
2. Replace the warning lamp bulb, if needed.
3. If the bulb is good, repair the open circuit between

the fuse F1 and the terminal 3 of the connector
C208.

Is the repair complete?

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–

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Go to

Diagnostic

System Check

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–

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1. Disconnect the negative battery terminal.
2. Wait at least 1 minute before proceeding.
3. Replace the SIR wiring harness.
Is the repair complete?

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–

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System OK

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–

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 63

DIAGNOSTIC TROUBLE CODE (DTC) 31

SDM INTERNAL FAULT

Circuit Description

When the ignition switch is turned ON, the sensing and
diagnostic module (SDM) will perform tests to diagnose
malfunctions within itself.

DTC 31 Will Set When

The SDM does not pass the internal tests.

Test Description

Caution: Before testing, disconnect the negative
battery cable. Wait 1 minute for the SDM capacitor
to discharge. The capacitor supplies reserve power
to deploy the airbags, even if the battery is discon-
nected. Unintentional deployment of the airbags
can cause injury.

DTC 31 – SDM Internal Fault

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Step

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Action

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Value(s)

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Yes

ÁÁÁÁÁÁ

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Disconnect the negative battery cable.
2. Replace the SDM.
Is the repair complete?

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–

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Go to

Diagnostic

System Check

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–

DIAGNOSTIC TROUBLE CODE (DTC) 32

SDM CRASH RECORDED

Circuit Description

When the ignition switch is turned ON, the sensing and
diagnostic module (SDM) will perform tests to diagnose
any malfunctions within itself.

DTC 32 Will Set When

The SDM has previously detected a crash.

Test Description

DTC 32 – SDM Crash Recorded

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Step

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Action

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Value(s)

ÁÁÁÁÁÁÁ

Yes

ÁÁÁÁÁÁ

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ÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁÁ

1. Disconnect the negative battery cable.
2. Replace the SDM.
Is the repair complete?

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–

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Go to

Diagnostic

System Check

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–

D110B303

Caution: Do not use these illustrations to trouble-
shoot without consulting the diagnostic trouble
code (DTC) charts. The DTC charts give additional
safety precautions and detailed instructions for
each test. Failure to follow the proper precautions
can result in injury from unintended airbag deploy-
ment.

DIAGNOSTIC ILLUSTRATION 1

Checking the continuity between the terminal 9 of the
sensing and diagnostic module and the terminal J (13) of
the assembly line diagnostic link.

8B – 64 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

D110B304

DIAGNOSTIC ILLUSTRATION 2

Checking the continuity on the instrument harness side
between the terminal J (13) of the assembly line diag-
nostic link and the terminal 4 of the connector C208.

D110B305

DIAGNOSTIC ILLUSTRATION 3

Measuring the wiring harness for the continuity of the
driver side airbag module circuit.

D110B306

DIAGNOSTIC ILLUSTRATION 4

Checking the continuity of the driver airbag circuit on the
sensing and diagnostic module (SDM) side of the clock
spring connector.

D110B307

DIAGNOSTIC ILLUSTRATION 5

Checking the driver airbag circuit for a short to ground
with the sensing and diagnostic module disconnected.

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Daewoo Matiz (2003 year). Manual — part 220

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