No Response From Central Timer Module - Mercedes-Benz Sprinter 2003 Manual

COMMUNICATION
Symptom:

*NO RESPONSE FROM CENTRAL TIMER MODULE

CHECK POWERS AND GROUNDS TO THE CENTRAL TIMER MODULE
SECURITY SYSTEM MODULE
K-CTM, SSM CIRCUIT SHORTED TO GROUND
SECURITY SYSTEM MODULE
K-CTM, SSM CIRCUIT SHORTED TO VOLTAGE
K-CTM, SSM CIRCUIT OPEN
CENTRAL TIMER MODULE
TEST
1 Turn the ignition off.
Disconnect the Central Timer Module harness connectors.
Check each power and ground circuit to the module.
Were any problems found?
Yes → Refer to the wiring diagrams located in the service information to
→ Go To 2
No
2 Turn the ignition off.
Disconnect the CTM harness connectors.
Disconnect the DRBIII from the DLC.
Measure the resistance between ground and the K-CTM, SSM circuit.
Is the resistance below 5.0 ohms?
Yes → Go To 3
→ Go To 4
No
3 Turn the ignition off.
Disconnect the Security System Module harness connector.
Measure the resistance between ground and the K-CTM, SSM circuit.
Is the resistance below 5.0 ohms?
Yes → Repair the K-CTM, SSM circuit for a short to ground.
→ Replace the Security System Module in accordance with the
No
POSSIBLE CAUSES
ACTION
help isolate an open or shorted condition. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
service information.
Perform BODY VERIFICATION TEST - VER 1.
108
APPLICABILITY
All
All
All