Daewoo Matiz (2003 year). Manual - part 207

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 9

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8B – 10 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

SYSTEM CHECK

D1AB301B

Caution: Use only the scan tool to check the airbag
modules and the sensing and diagnostic module
(SDM). Never measure the resistance of an airbag
module with an ohmmeter. An ohmmeter’s battery
can deploy the airbag and cause injury.

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.

Caution: Do not attempt to repair the supplemental
inflatable restraints (SIR) wiring harness. An SIR re-
pair can create a high-resistance connection which
can keep the airbags from deploying when needed,
resulting in injury.

Circuit Description

When the ignition switch is turned ON, the SDM is able
to send serial data from the terminal 9 of the SDM to the
terminal J (13) of the assembly line diagnostic link.

Diagnostic System Check

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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. Check the warning lamp.
Does the warning lamp turn off after 4 seconds?

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–

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System OK

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Go to Step 2

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1. Connect the scan tool cable to the DLC.
2. Connect the scan tool power cable to the cigar

lighter socket.

3. Select the airbag main menu on the scan tool.
4. Select “Fail Code View & Clear “ from the

displayed menu of the diagnostic test codes
(DTC).

Are there any active fault codes?

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–

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Go to the DTC

table for the

fault indicated

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Go to Step 3

SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR) 8B – 11

Diagnostic System Check (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. Check fuse F2.
Is the fuse F2 blown?

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–

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Go to Step 4

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Go to Step 5

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1. Replace fuse F2.
Is the repair complete?

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–

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System OK

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–

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1. Disconnect the electrical connector C208.
2. Check for a short to ground between fuse F2 and

terminal 2 of connector C208.

Is wiring harness shorted to ground?

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–

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Go to Step 6

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Go to Step 7

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Repair a short to ground between fuse F2 and
terminal 2 of connector C208.
Is the repair complete?

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–

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System OK

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–

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1. Disconnect the SDM electrical connector.
2. Check for a short to ground between terminal 2

and terminal 5 of SDM connector.

Is wiring harness shorted to ground?

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–

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Go to Step 15

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Go to Step 8

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Use an ohmmeter to check for continuity between
terminal A (4) of the DLC and ground G201.
Does the ohmmeter show the specified value?

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≈

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Go to Step 9

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Go to Step 10

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Repair the open DLC ground circuit.
Is the repair complete?

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–

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System OK

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–

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1. Turn the ignition ON.
2. Check the voltage at the cigar lighter positive

terminal.

Does the voltmeter show the specified value?

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11–14V

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Go to Step 12

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Go to Step 11

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Repair the power supply for the cigar lighter socket.
Is the repair complete?

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–

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System OK

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–

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Check for a short to ground of open circuit between
terminal J (13) of the DLC and terminal 4 of
connector 208.
Is wiring harness shorted to ground or open?

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–

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Go to Step 13

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Go to Step 14

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Repair a short to ground or open circuit between
terminal J (13) of the DLC and terminal 4 of
connector C208.
Is the repair complete?

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–

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System OK

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–

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Check for a short to ground or open between
terminal 4 of connector C208 and terminal 9 of the
SDM connector.
Is wiring harness shorted to ground or open?

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–

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Go to Step 15

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Go to Step 16

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Replace the SDM waring harness.
Is the repair complete?

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–

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System OK

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–

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Replace the SDM.
Is the repair complete?

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–

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System OK

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–

8B – 12 SUPPLEMENTAL INFLATABLE RESTRAINTS (SIR)

FAULT CODES

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Fault Codes