2006 MERCEDES-BENZ SPRINTER ECU

Symptom:
REAR OR SLIDING DOOR JAMB SWITCH CIRCUIT SHORT TO
GROUND
When Monitored and Set Condition:
REAR OR SLIDING DOOR JAMB SWITCH CIRCUIT SHORT TO GROUND
When Monitored: Whenever the battery voltage is above 10.0 volts and the Security
System Module is connected.
Set Condition: If a rear or sliding door jamb switch is closed or the rear courtesy lamps
control circuit is grounded for over 30 minutes, this code will set.
POSSIBLE CAUSES
DTC PRESENT
SLIDING DOOR JAMB SWITCH SHORTED
REAR DOOR JAMB SWITCH SHORTED
SECURITY SYSTEM MODULE SHORTED
REAR COURTESY LAMPS CONTROL SHORT TO GROUND
TEST ACTION APPLICABILITY
1NOTE: Ensure the courtesy lamp switches operate properly before proceed-
ing.
NOTE: If this code is active, the rear courtesy lamps will remain on with all
the doors closed.
With the DRBIIIt, record and erase DTC's.
Cycle the ignition switch from ON to OFF to ON.
With the DRBIIIt, read DTC's.
Open and close the sliding and rear doors several times while observing the DRBIIIt.
Wait 10 seconds.
Does the DRBIIItdisplay REAR OR SLIDING DOOR JAMB SWITCH CIRCUIT
SHORT TO GROUND?All
Ye s!Go To 2
No!The conditions that caused this code to set are not present at this
time. Using the wiring diagram/schematic as a guide, inspect the
wiring and connectors for an intermittent condition.
Perform BODY VERIFICATION TEST - VER 1.
2 Turn the ignition off.
Disconnect the Right and then the Left (if equipped) Sliding Door Jamb Switch
connector.
Observe the courtesy lamps.
Did the courtesy lamps go off when one of the switches was disconnected?All
Ye s!Replace the Sliding Door Jamb Switch.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 3
229
VEHICLE THEFT/SECURITY

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Rear Door Jamb Switch connector.
Ensure the sliding door(s) are closed or the switches are disconnected.
Observe the courtesy lamps.
Did the courtesy lamps go off?All
Ye s!Replace the Rear Door Jamb Switch.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 4
4 Turn the ignition off.
Disconnect the Security System Module C1 connector.
Ensure the sliding and rear doors are closed or the switches are disconnected.
Observe the courtesy lamps.
Did the courtesy lamps go off?All
Ye s!Replace the Security System Module in accordance with service
information.
Perform BODY VERIFICATION TEST - VER 1.
No!Repair the Rear Courtesy Lamps Control circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
230
VEHICLE THEFT/SECURITY
REAR OR SLIDING DOOR JAMB SWITCH CIRCUIT SHORT TO GROUND
Ð
Continued

Symptom:
RKE INTERFACE CIRCUIT FAILURE - SSM
When Monitored and Set Condition:
RKE INTERFACE CIRCUIT 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
Central Timer Module, this code will set.
POSSIBLE CAUSES
DTC PRESENT
SECURITY SYSTEM MODULE SHORTED
RKE INTERFACE WIRE SHORTED
RKE INTERFACE WIRE OPEN
CENTRAL TIMER MODULE FAILURE
TEST ACTION APPLICABILITY
1 With the DRBIIIt, record and erase DTC's.
Cycle the ignition switch from ON to OFF to ON.
With the DRBIIIt, read DTC's.
Remove the ignition key.
Using the RKE transmitter, operate the Door Locks several times while observing the
DRBIIIt.
Wait 10 seconds.
Does the DRBIIItdisplay RKE INTERFACE CIRCUIT FAILURE?All
Ye s!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 Security System Module C2 connector.
Measure the resistance between ground and the RKE Interface circuit.
Is the resistance between 5500.0 (5.5K) and 6500.0 (6.5K) ohms?All
Ye s!Replace the Security System Module.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 3
231
VEHICLE THEFT/SECURITY

TEST ACTION APPLICABILITY
3 Disconnect the Central Timer Module C1 connector.
Disconnect the Security System Module C2 connector.
Measure the resistance between ground and the RKE Interface circuit.
Is the resistance below 20000.0 ohms?All
Ye s!Repair the RKE Interface circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No!Go To 4
4 Disconnect the Central Timer Module C1 connector.
Disconnect the Security System Module C2 connector.
Measure the resistance of the RKE Interface circuit between the SSM C2 connector
and the CTM C1 connector..
Is the resistance below 5.0 ohms?All
Ye s!Replace the Central Timer Module.
Perform BODY VERIFICATION TEST - VER 1.
No!Repair the RKE Interface circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
232
VEHICLE THEFT/SECURITY
RKE INTERFACE CIRCUIT FAILURE - SSM ÐContinued

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 DRBIIIt, record and erase DTC's.
Cycle the ignition switch from ON to OFF to ON.
With the DRBIIIt, read DTC's.
Using the RKE transmitter, operate the Door Locks several times while observing the
DRBIIIt.
Wait 10 seconds.
Does the DRBIIItdisplay SECURITY SYSTEM INTERFACE CIRCUIT FAILURE?All
Ye s!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
Ye s!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
Ye s!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
Ye s!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 ÐContinued

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 DRBIIIt, 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 DRBIIIt, read DTC's.
Does the DRBIIItdisplay the same DTC?All
Ye s!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
Ye s!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
Ye s!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
Ye s!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
Ye s!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
Ye s!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 ÐContinued