Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 59
Symptom:
SECURITY SYSTEM INTERFACE FAILURE - SSM
When Monitored and Set Condition:
SECURITY SYSTEM INTERFACE FAILURE - SSM
When Monitored:
Whenever the battery voltage is above 10.0 volts and the Security
System Module is connected.
Set Condition:
If the Security System Module senses a poor or no connection to the Sentry
Key Remote Entry Module, this code will set.
POSSIBLE CAUSES
DTC PRESENT
SENTRY KEY REMOTE MODULE MODULE SHORTED
SECURITY SYSTEM INTERFACE WIRE SHORTED
SECURITY SYSTEM INTERFACE WIRE OPEN
SECURITY SYSTEM MODULE FAILURE
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, record and erase DTC’s.
Cycle the ignition switch from ON to OFF to ON.
With the DRBIII
t, read DTC’s.
Using the RKE transmitter, operate the Door Locks several times while observing the
DRBIII
t.
Wait 10 seconds.
Does the DRBIII
t display SECURITY SYSTEM INTERFACE CIRCUIT FAILURE?
All
Yes
→ Go To 2
No
→ Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition. Using the
RKE transmitter, operate the door locks several times and re-
check for any DTC’s.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the SENTRY KEY REMOTE ENTRY MODULE connector.
Measure the resistance between ground and the Security System Interface circuit.
Is the resistance between 5200.0 (5.2K) and 6800.0 (6.8K) ohms?
All
Yes
→ Replace the Sentry Key Remote Entry Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
233
VEHICLE THEFT/SECURITY
TEST
ACTION
APPLICABILITY
3
Disconnect the Sentry Key Remote Entry Module connector.
Disconnect the Security System Module C2 connector.
Measure the resistance between ground and the Security System Interface circuit.
Is the resistance below 20000.0 ohms?
All
Yes
→ Repair the Security System Interface circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Disconnect the Sentry Key Remoter Entry connector.
Disconnect the Security System Module C2 connector.
Measure the resistance of the Security System circuit between the SSM C2 connector
and the CTM C1 connector..
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Security System Module.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Security System Interface circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
234
VEHICLE THEFT/SECURITY
SECURITY SYSTEM INTERFACE FAILURE - SSM —
Continued
Symptom:
SIREN CIRCUIT OPEN/SHORTED TO GROUND
When Monitored and Set Condition:
SIREN CIRCUIT OPEN/SHORTED TO GROUND
When Monitored:
Whenever the battery voltage is above 10.0 volts and the Security
System Module is connected.
Set Condition:
The Security System Module detects the incorrect voltage on the Siren
Signal Control circuit.
POSSIBLE CAUSES
DTC PRESENT
FUSE 2 IN FUSE BLOCK 3
FUSED B(+) WIRE OPEN
GROUND CIRCUIT OPEN
SIREN SIGNAL CONTROL WIRE SHORTED
SIREN SIGNAL CONTROL WIRE OPEN
SIREN
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, record and erase DTC’s.
Remove the ignition key.
Close and lock all doors and set the Vehicle Theft Security System.
Wait 1 minute.
Disarm the Vehicle Theft System.
With the DRBIII
t, read DTC’s.
Does the DRBIII
t display the same DTC?
All
Yes
→ Go To 2
No
→ Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2
Check Fuse 2 in Fuse Block 3.
Is the fuse open?
All
Yes
→ Check for a short to ground and replace the fuse.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Disconnect the Siren connector.
Measure the voltage of the Fused B(+) circuit.
Is the voltage above 10.0 volts?
All
Yes
→ Go To 4
No
→ Repair the Fused B(+) circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
235
VEHICLE THEFT/SECURITY
TEST
ACTION
APPLICABILITY
4
Disconnect the Siren connector.
Measure the resistance of the Ground circuit at the Siren connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 5
No
→ Repair the Ground circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
5
Disconnect the Siren connector.
Disconnect the Security System Module C2 connector.
Measure the resistance between ground and the Siren Signal Control circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Siren Signal Control circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 6
6
Disconnect the Siren connector.
Disconnect the Security System Module C2 connector.
Measure the resistance of the Siren Signal Control circuit between the SSM C2
connector and the Siren connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Replace the Siren.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Repair the Siren Signal Control circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
236
VEHICLE THEFT/SECURITY
SIREN CIRCUIT OPEN/SHORTED TO GROUND —
Continued
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