2006 MERCEDES-BENZ SPRINTER lock

TEST ACTION APPLICABILITY
3 Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Sensor Supply circuit to all other circuits in the
Transmission Solenoid harness connector.
Is the resistance below 5.0 ohms between any other circuit?All
Ye s!Repair the Sensor Supply circuit for a short to other circuit-s.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 4
4 Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Sensor Supply circuit to chassis ground in the
Transmission Solenoid Assembly harness connector.
Is the resistance below 5.0 ohms?All
Ye s!Repair the Sensor Supply Voltage circuit for a short to ground.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Replace the Transmission Control Module.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
5 The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wires while checking for shorts and open circuits.
NOTE: Check for any Technical Service Bulletins that may apply.
Were there any problems found?All
Ye s!Repair as necessary
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Test Complete.
96
TRANSMISSION - NAG1
SENSOR SUPPLY VOLTAGE ÐContinued

TEST ACTION APPLICABILITY
4 Turn the ignition off to the lock position.
Disconnect the Shift Lever harness connector.
Measure the resistance between the CAN C Bus (+) circuit and the CAN C Bus (-)
circuit in the Shift Lever harness connector.
Is the resistance 60 ohms,   3.0 ohms?All
Ye s!Replace the Shift Lever Assembly per the service information.
No!Repair the CAN Bus (+) or the CAN Bus (-) circuit for an open.
98
TRANSMISSION - NAG1
SHIFT LEVER POSITION INVALID ÐContinued

TEST ACTION APPLICABILITY
2 Ignition on, engine not running.
With the DRBIIIt, erase DTCs.
With the DRBIIIt, perform the Solenoid Test.
With the DRBIIIt, read DTCs.
Did the DTC, SHIFT PRESSURE SOLENOID CIRCUIT, reset?All
Ye s!Go To 3
No!Go To 7
3 Turn the ignition off to the lock position.
Disconnect the Transmission Control Module C2 harness connector.
Disconnect the Transmission Solenoid Assembly harness connector
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Shift Pressure Solenoid Control circuit from the TCM
C2 harness connector to the Transmission Solenoid Assembly harness connector.
Is the resistance above 5.0 ohms?All
Ye s!Repair the Shift Pressure Solenoid Control circuit for an open.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 4
4 Turn the ignition off to the lock position.
Disconnect the Transmission Control Module C2 harness connector.
Disconnect the Transmission Solenoid Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Shift Pressure Solenoid Control
circuit.
Is the resistance below 5.0 ohms?All
Ye s!Repair the Shift Pressure Solenoid Control circuit for a short to
ground.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 5
5 Turn the ignition off to the lock position.
Disconnect the Transmission Control Module C2 harness connector.
Disconnect the Transmission Solenoid Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Shift Pressure Solenoid Control circuit to all other
circuits in the Transmission Solenoid harness connector.
Is the resistance below 5.0 ohms between any other circuit?All
Ye s!Repair the Shift Pressure Solenoid Control circuit for a short to
other circuits.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 6
100
TRANSMISSION - NAG1
SHIFT PRESSURE SOLENOID CIRCUIT ÐContinued

TEST ACTION APPLICABILITY
6 Turn the ignition off to the lock position.
Disconnect the Transmission Control Module C2 harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between the Shift Pressure Solenoid Control circuit and the
Solenoid Supply Voltage circuit in the Transmission Control Module C2 harness
connector.
Is the resistance between 4.0 and 8.0 ohms?All
Ye s!Replace the Transmission Control Module.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Replace the Shift Pressure Solenoid.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
7 The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wires while checking for shorts and open circuits.
NOTE: Check for any Technical Service Bulletins that may apply.
Were there any problems found?All
Ye s!Repair as necessary
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Test Complete.
101
TRANSMISSION - NAG1
SHIFT PRESSURE SOLENOID CIRCUIT ÐContinued

TEST ACTION APPLICABILITY
3 Turn the ignition off to the lock position.
Disconnect the Transmission Control Module C2 harness connector.
Disconnect the Transmission Solenoid Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Solenoid Supply circuit to all other circuits in the
Transmission Solenoid harness connector.
Is the resistance below 5.0 ohms between any other circuit?All
Ye s!Repair the Solenoid Supply circuit for a short to other circuits.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 4
4 Turn the ignition off to the lock position.
Disconnect the Transmission Control Module C2 harness connector.
Disconnect the Transmission Solenoid Assembly harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Solenoid Supply circuit to chassis ground in the
Transmission Solenoid harness connector.
Is the resistance below 5.0 ohms?All
Ye s!Repair the Solenoid Supply Voltage circuit for a short to ground or
high resistance.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 5
5 Turn the ignition off to the lock position.
Disconnect the Transmission Control Module C2 harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between all Solenoid Control circuits and chassis ground in
the Transmission Control Module C2 harness connector.
Is the resistance below 5.0 ohms?All
Ye s!Replace the Solenoid that is shorted to ground.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Replace the Transmission Control Module.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
6 The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wires while checking for shorts and open circuits.
NOTE: Check for any Technical Service Bulletins that may apply.
Were there any problems found?All
Ye s!Repair as necessary
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Test Complete.
104
TRANSMISSION - NAG1
SOLENOID SUPPLY VOLTAGE ÐContinued

TEST ACTION APPLICABILITY
3 Turn the ignition off to the lock position.
Remove the TCM harness connector.
Disconnect the Solenoid harness connector.
Check the resistance between the Solenoid Supply circuit and all other circuits in the
TCM harness connector.
Is the resistance below 5.0 ohms between Solenoid Supply and any other circuit?All
Ye s!Repair the Solenoid Supply circuit short to other circuits.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!The TCM has an internal error. Replace the Transmission Control
Module.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
106
TRANSMISSION - NAG1
SOLENOID SUPPLY/WATCHDOG ÐContinued

TEST ACTION APPLICABILITY
3 With the DRBIIIt, read the Engine DTC's.
Are there any Engine Charging System DTC's present?All
Ye s!Refer to the Charging category and perform the appropriate
symptom.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 4
4 Turn the ignition off to the lock position.
Disconnect the TCM C1 harness connector.
Check connectors - Clean/repair as necessary.
Start the engine.
Increase the Engine Speed to 1500 RPM.
Measure the voltage of the Transmission Relay Output circuit in the TCM C1
harness connector.
Is the voltage below 16.9 volts?All
Ye s!Go To 5
No!Refer the Charging category and perform the symptom, Charging
System with No DTCs present.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
5 If there are no possible causes remaining, view repair. All
Repair
Replace the TCM.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
108
TRANSMISSION - NAG1
SYSTEM OVERVOLTAGE ÐContinued

TEST ACTION APPLICABILITY
3 Turn the ignition off to the lock position.
Disconnect the TCM C1 harness connector.
Start the engine.
Increase the Engine Speed to 1500 RPM.
Measure the voltage of the Transmission Relay Output circuit in the TCM C1
harness connector.
Is the voltage below 9.0 volts?All
Ye s!Repair the Transmission Relay Output circuit for an open or high
resistance.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Replace the Transmission Control Module.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
11 0
TRANSMISSION - NAG1
SYSTEM UNDERVOLTAGE ÐContinued