Opel Frontera UE. Manual - part 601

RESTRAINT CONTROL SYSTEM

9J1–49

DTC 53  Deployment Commanded With Deployment Loop Fault Or Energy 
Reserves Out Of Range

D09RX002

Circuit Description:

The Sensing and Diagnostic Module (SDM) contains a 
sensing drive which converts vehicle velocity changes 
to an electrical  signal.  The electrical signal generated 
is processed by the SDM and then compared to a value  
stored in memory.  When the generated signal exceeds 
the stored value, the SDM will cause  current to flow 
through the air bag assembly deploying the air bags. 
Diagnostic Trouble Code (DTC) 53 is set  accompanying 
with DTC 51 when a deployment occurs while an air bag 
assembly circuit fault  is present that could possible 
result in a no deployment situation in one or both air bag  
assemblies.

DTC Will Set When:

The SDM detects a frontal crash, up to 30 degrees off 

the centerline of the vehicle, of  sufficient force to 
warrant deployment of the air bags and an inflator circuit 
fault is  present.

Action Taken:

SDM turns “ON" the “AIR BAG" warning lamp records 
“Crash Data", and sets a diagnostic trouble  code.

DTC Will Clear When:

The SDM is replaced.  If DTC 53 is set, one or more 
DTCs will be set in addition to DTC 53.   Malfunction(s) 
setting DTC(s) (other than DTC 71) must be repaired so 
that DTC(s) will  not be set when a new SDM is 
installed.

9J1–50

RESTRAINT CONTROL SYSTEM

DTC Chart Test Description:

Number(s) below refer to step number(s) on the 
diagnostic chart:
2. If air bag assembly has not deployed, Diagnostic 

Trouble Code (DTC) 53 may have falsely set.

3. If DTC 53 has set with no signs of frontal impact, the 

diagnostic trouble code has  falsely set.

RESTRAINT CONTROL SYSTEM

9J1–51

DTC 53 Deployment Commanded With Deployment Loop Fault Or Energy Reserves Out Of 
Range

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.

Step

Action

Yes

No

1

Was the “SRS Diagnostic System Check" performed?

Go to Step 2

Go to the “SRS 

Diagnostic System 

Check."

2

Ignition switch “OFF."
Have air bag assemblies deployed?

Replace 

components 

and perform 

inspections as 

directed in 

“repairs and 

inspections 

required after 

an accident" in 

this section.

Clear 

diagnostic 

trouble codes.

Repeat the 

“SRS 

Diagnostic 

System Check."

Go to Step 3

3

Inspect front of vehicle and undercarriage for signs of impact.
Were signs of impact found?

Replace 

components 

and perform 

inspections as 

directed in 

“repairs and 

inspections 

required after 

an accident" in 

this section.

Clear 

diagnostic 

trouble codes.

Repeat the 

“SRS 

Diagnostic 

System Check."

Ignition switch 

“OFF."

Replace SDM.

Reconnect all 

SRS system 

components, 

ensure all 

components 

are properly 

mounted.

Repeat the 

“SRS 

Diagnostic 

System Check."

9J1–52

RESTRAINT CONTROL SYSTEM

DTC 61  Warning Lamp Circuit Failure

D09RX002

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 Sensing and 
Diagnostic Module (SDM) responds by flashing the “AIR 
BAG"  warning lamp seven times.  The SDM monitors 
the lamp driver output by comparing the output  state at 
“Supplemental Restraint System (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.