Opel Frontera UBS. Manual - part 2934

9J1–39

RESTRAINT CONTROL SYSTEM

DTC 61  Warning Lamp Circuit Failure

D09RW014

Circuit Description:

When the ignition switch is turned “ON”, battery voltage is
applied to the “AIR BAG” warning lamp and to the “Ignition
1” input terminal “12”.  The SDM responds by turning on
the “AIR BAG” warning lamp 3.5 seconds.  The SDM
monitors the lamp driver output by comparing the output
state at “SRS Warning Lamp” terminal “7” to the
microprocessor commanded state.  When “Ignition 1” is in
the specified value, and the output state does not match
the commanded state of the lamp driver for 500
milliseconds, DTC 61 is set.

DTC Will Set When:

“Ignition 1” voltage is in the specified value and the output
state at the “SRS Warning Lamp” terminal does not match

the commanded state of the lamp driver for 500
milliseconds.  This test is run every 100 milliseconds
during “Continuous Monitoring” tests and once per each
ignition cycle at the beginning.

Action Taken:

SDM attempts to turn “ON” the “AIR BAG” warning lamp
and sets a diagnostic trouble code.

DTC Will Clear When:

The ignition switch is turned “OFF.”

Diagnostic Aids:

Refer to Charts B and C to diagnose warning lamp circuit
malfunctions.

RESTRAINT CONTROL SYSTEM

9J1–40

DTC 61 Warning Lamp Circuit Failure 

Step

Action

Yes

No

1

Was the “SRS Diagnostic System Check” performed?

Go to Step 2

Go to the “SRS

Diagnostic

System Check”

2

1. Malfunctions within the “AIR BAG” warning lamp circuitry will

set this diagnostic trouble code.

2. These malfunctions are addressed in the “SRS Diagnostic

System Check” via Chart B and Chart C. 

3. Failure to properly perform the “SRS Diagnostic System

Check” may result in misdiagnosis.

4. Ignition switch “ON.”
5. Clear SRS diagnostic trouble codes.

IS DTC 61 set?

Ignition switch

“OFF” 

Go to Chart A

Repeat the “SRS

Diagnostic

System Check”

9J1–41

RESTRAINT CONTROL SYSTEM

DTC 71  Internal SDM Fault

D09RW014

Circuit Description:

DTC 71 is an indication of a potential internal SDM
malfunction and will set if any of the following conditions
are detected:
1) Deployment or microprocessor energy reserve failure.
2) EEPROM failure.
3) ROM failure.
4) RAM failure.
5) Calibration check sum failure.
6) Deployment switch faults.
7) Accelerometer fault.
8) Arming sensor fault.
9) Diagnostic current faults.
10) DTC 19
11) DTC 25
12) DTC 51
13) DTC 53

DTC Will Set When:

Any of the above indicated malfunctions are detected by
the SDM.  The malfunctions described above are tested
mainly during “Continuous Monitoring” and some ones
run each ignition cycle.

Action Taken:

SDM turns “ON” the “AIR BAG” warning lamp and sets a
diagnostic trouble code.

DTC Will Clear When:

A scan tool “Clear Codes” commanded is received by the
SDM.  Some of the indicated malfunctions will only allow
the “AIR BAG” warning lamp to go out.
But when DTC 19, 25, 51, 53 are also set, SDM is
replaced.

RESTRAINT CONTROL SYSTEM

9J1–42

DTC 71 Internal SDM Fault 

WARNING: DURING SERVICE PROCEDURES. BE VERY CAREFUL WHEN HANDLING A SENSING AND
DIAGNOSTIC MODULE (SDM). NEVER STRIKE OR JAR THE SDM.  NEVER POWER UP THE SRS WHEN THE
SDM IS NOT RIGIDLY ATTACHED TO THE VEHICLE. ALL SDM AND MOUNTING BRACKET FASTENERS MUST
BE CAREFULLY TORQUED AND THE ARROW MUST BE POINTING TOWARD THE FRONT OF THE VEHICLE
TO ENSURE PROPER OPERATION OF THE SRS. THE SDM COULD BE ACTIVATED WHEN POWERED WHILE
NOT RIGIDLY ATTACHED TO THE VEHICLE WHICH COULD CAUSE DEPLOYMENT AND RESULT IN
PERSONAL INJURY.

CAUTION: When DTC 19 or 25 has been set, it is necessary to replace the SDM.  Setting DTC 19 and 25 or 51
or 53 will also cause DTC 71 to set.  When a scan tool “CLEAR CODES” command is issued and the
malfunction is no longer present, DTC 51 or 53 and DTC 71 will remain current.  Ensure that the short to voltage
condition DTC 19, 25 is repaired prior to installing a replacement SDM to avoid damaging the SDM. 

Step

Action

Yes

No

1

Was the “SRS Diagnostic System Check” performed?

Go to Step 2

Go to the “SRS

Diagnostic

System Check”

2

Note SRS “Diagnostic System Check.”

IS DTC 19 OR 25 OR 51 OR 53 ALSO SET (CURRENT OR
HISTORY)? (REFER TO NOTICE ABOVE.)

Go to DTC 19 if

DTC 19 is set

Go to DTC 25 if

DTC 25 is set

Go to DTC 51 if

DTC 51 is set

Go to DTC 53 if

DTC 53 is set

Ignition switch

“OFF”

Replace SDM

Repeat the “SRS

Diagnostic

System Check”