AutoHex Online Help: Hyundai ACCENT(LC) 2003 Fault Code: b1378

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B1378 Side Airbag Front-Driver Resistance too High

AutoHex Online Help: Hyundai ACCENT(LC) 2003

CIRCUIT INSPECTION (DUAL STAGE AIRBAG)

DTC	B1378 DSAB Resistance too high (R = 4.2?) B1379 DSAB Resistance too low (R = 1.0?) B1382 PSAB Resistance too high (R = 4.2?) B1383 PSAB Resistance too low (R = 1.0?)

CIRCUIT DESCRIPTION

DTC Detecting Condition	Trouble Area
Too high or low resistane between SAB high (+) wiring harness and SAB low (-) wiring harness of squib. SAB malfunction SRSCM malfunction	SAB squib SRSCM Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

Preparation

Disconnect the negative (-) terminal cable from the battery, and wait at least 30 seconds.

Remove the DAB module.

Disconnect the connectors of the PAB, left and right side airbags, belt pretensioners and satellite sensors.

Disconnect the SRSCM connector.

warning

Place the DAB with the front surface facing upward.

Check the SAB resistance.

[PREPARATION]

Release the airbag activation prevention mechanism on the SRSCM side of the airbag squib side. Connect the dummy (0957A-38200) and dummy adapter (0957A-38300) to the SAB connector of the SRSCM connector side.

warning

Before checking the resistance, you have to insert the shorting bar insert plastic that is attached to the diagnosis checker into the SRSCM connector.

[CHECK]

Measure the resistance between the SAB high (+) and the SAB low (-).

1.8? = R = 2.8?

Check the SAB squib.

Turn the ignition switch to LOCK.

Disconnect the negative (-) terminal cable from the battery, and wait for 30 seconds.

Connect the SAB connector.

Connect the negative (-) terminal cable to the battery, and wait for 30 seconds.

Turn the ignition switch to ON, and wait for at least 30 seconds.

Clear the malfunction code stored in the memory with the Hi-Scan Pro.

Turn the ignition switch to LOCK, and wait for 30 seconds.

Turn the ignition switch to ON, and wait for 30 seconds.

Using Hi-Scan Pro, check the DTC.

There is no DTC.

[HINT]

Codes other than these may be output at this time, but they are not relevant to this procedure.

CIRCUIT INSPECTION

DTC	B1111	Battery voltage too high
DTC	B1112	Battery voltage too low

CIRCUIT DESCRIPTION

INSPECTION PROCEDURE

Preparation.

Disconnect the negative (-) terminal cable from the battery, and wait at least 30 seconds.

Remove the DAB module.

Disconnect connectors of PAB and belt pretensioners.

Disconnect connectors of SRSCM.

caution

Store the DAB with the front surface facing upward.

Check source voltage.

Connect negative (-) terminal cable to battery.

Turn ignition switch ON.

Does SRS warning light turn off ?

[PREPARATION]

Turn ignition switch to LOCK.

Connect the DAB module.

Connect PAB connector and belt pretensioner .

Connect SRSCM connector.

Turn ignition switch ON.

[CHECK]

Check that SRS warning light goes off.

CIRCUIT INSPECTION

DTC	B1348	DAB Short to ground
	B1354	PAB Short to ground
	B1363	Driver BPT Short to ground
	B1369	Passenger BPT Short to ground

CIRCUIT DESCRIPTION

DTC Detecting Condition	Trouble Area
Short circuit in squib wire harness (to ground) Squib malfunction Clock spring malfunction SRSCM malfunction	DAB squib PAB squib BPT squib Clock spring SRSCM Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

Preparation (See step "1" on page RT-19).

Check DAB squib circuit.

Resistance : 8

Check PAB squib circuit.

Resistance : 8

Check BPT squib circuit.

Resistance : 8

Check SRSCM.

[PREPARATION]

Connector to SRSCM.

Using a service wire, connect DAB high and DAB low on the clock spring side of connector between clock spring and DAB.

Using a service wire, connect PAB high and low on SRSCM side of connector between SRSCM and PAB.

Connect BPT using the same method.

Connect negative (-) terminal cable to battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

Check DAB squib.

[PREPARATION]

Turn ignition switch to LOCK.

Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.

Connect DAB connector.

Connect negative (-) terminal cable to the battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

Check PAB squib.

[PREPARATION]

Turn ignition switch to LOCK.

Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.

Connect SAB connector.

Connect negative (-) terminal cable from the battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

DTC has no output.

Check BPT squib.

[PREPARATION]

Turn ignition swich to LOCK.

Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.

Connect BPT connector.

Connect negative (-) terminal cable from the battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

DTC is not output.

Check clock spring circuit.

Resistance : 8

CIRCUIT INSPECTION

DTC	B1349	DAB Short to battery
	B1355	PAB Short to battery
	B1364	BPT (Driver) short to battery
	B1370	BPT (Passenger) short to battery

CIRCUIT DESCRIPTION

DTC Detecting Condition	Trouble Area
Short circuit in squib wire harness (to B+) Squib malfunction Spiral cable malfunction SRSCM malfunction	DAB squib PAB squib BPT squib Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

Preparation (See step "1" on page RT-19).

Check DAB squib circuit.

Check PAB squib circuit.

Voltage : 0 V

Check BPT squib circuit.

Voltage : 0 V

Check SRSCM.

[PREPARATION]

Connect connector to SRSCM.

Using a service wire, connect DAB high and low on the clock spring side of connector between clock spring and DAB.

Using a service wire, connect PAB high and low on SRSCM side of connector between SRSCM and PAB.

Using a service wire, connect BPT high and low on SRSCM side connector between SRSCM and BPT.

Connect negative (-) terminal cable to battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

DTC is not output.

Check DAB squib.

[PREPARATION]

Turn ignition switch to LOCK.

Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.

Connect DAB connector.

Connect negative (-) terminal cable to the battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

DTC is not output.

Check PAB squib.

[PREPARATION]

Turn ignition switch to LOCK.

Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.

Connect PAB connector.

Connect negative (-) terminal cable to the battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

DTC is not output.

Check BPT squib.

[PREPARATION]

Turn ignition switch to LOCK.

Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.

Connect BPT connector.

Connect negative (-) terminal cable from the battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

DTC is not output.

Check Clock spring.

[PREPARATION]

Turn ignition switch to LOCK.

Disconnect connector between SRSCM and clock spring.

Voltage : 0 V

CIRCUIT INSPECTION

DTC	B1346	DAB resistance too high (R > 6.7 O)
DTC	B1347	DAB resistance too low (R < 1.06 O)

CIRCUIT DESCRIPTION

DTC Detecting Condition	Trouble Area
Too high or low resistane between DAB high (+) wiring harness and DAB low (-) wiring harness of squib. DAB malfunction Clock spring malfunction SRSCM malfunction	DAB squib Clock spring SRSCM Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

Preparation (See step "1" on page RT-22).

Check DAB resistance.

1.8 O < R < 3.4 O

Check DAB squib.

[PREPARATION]

Turn ignition switch to LOCK.

Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.

Connect DAB connector.

Connect negative (-) terminal cable to the battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

DTC is not output.

Check Clock spring.

1.8 O < R < 3.4 O

CIRCUIT INSPECTION

DTC	B1352	PAB resistance too low (R > 5.4 O)
DTC	B1347	PAB resistance too low (R < 0.4 O)

CIRCUIT DESCRIPTION

DTC Detecting Condition	Trouble Area
Too high or low resistane between DAB high (+) wiring harness and DAB low (-) wiring harness of squib. DAB malfunction Clock spring malfunction SRSCM malfunction	DAB squib SRSCM Wire harness

WIRING DIAGRAM

INSPECTION PROCEDURE

Preparation (See step "1" on page RT-22).

Check PAB resistance.

1.6 O < R < 2.8 O

Check PAB squib.

[PREPARATION]

Turn ignition swich to LOCK.

Disconnect negative (-) terminal cable from the battery, and wait at least 30 seconds.

Connect PAB connector.

Connect negative (-) terminal cable to the battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

DTC is not output.

CIRCUIT INSPECTION

DTC	B1407	PPD Communication error
DTC	B1406	PPD Defect

CIRCUIT DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

Preparation (See step "1" on page RT-19).

Check PPD circuit (Communication error).

OK : Continuity

Check PPD interface unit.

Check continuity of PPD interface unit as high (+) and low (-).

Check PPD sensor (Defect or not).

R = 50 kO for W = 15kg

R > 50 kO for W = 0.6kg

Check PPD squib.

[PREPARATION]

Connect connector to SRSCM.

Connect negative (-) terminal cable to battery, and wait at least 30 seconds.

[CHECK]

Turn ignition switch to ON, and wait at least 30 seconds.

Clear malfunction code stored in memory with Hi-scan.

Turn ignition switch to LOCK, and wait at least 30 seconds.

Turn ignition switch to ON, and wait at least 30 seconds.

Using Hi-scan, check DTC.

DTC is not output.

CIRCUIT INSPECTION

DTC

B2500

Warning lamp failure

CIRCUIT DESCRIPTION

INSPECTION PROCEDURE

Check the fuse.

[PREPARATION]

Remove fuse No. 21 and 22 from the junction block.

Inspect the state of the fuses.

Replace if necessary.

Check SRS warning lamp circuit.

[PREPARATION]

Connect negative (-) terminal cable to the battery.

Turn ignition switch to ON.

[CHECK]

Measure voltage of harness side connector of SRSCM.

Voltage : 10-16.5 V

Check SRS SRI (Service Reminder Indicator).

OK : SRS SRI ON

CIRCUIT INSPECTION

DTC	B1620	Internal fault
	B1650	Crash recorded
	B1651	Crash recorded driver side airbag
	B1652	Crash recorded passnger side airbag
	B1661	ECU mismatching

CIRCUIT DESCRIPTION

Functional readiness of the firing circuit activation transistors.

Adequacy of deployment energy reserves.

Safing sensor integrity : detection of faulty closure.

Plausibility of accelerometer signal.

Operation of SRSCM components.