2006 MERCEDES-BENZ SPRINTER ESP

Symptom:
*NO RESPONSE FROM TRANSMISSION CONTROL MODULE
POSSIBLE CAUSES
CHECK POWERS AND GROUNDS TO THE TRANSMISSION CONTROL MODULE
K-TCM CIRCUIT SHORTED TO GROUND
K-TCM CIRCUIT SHORTED TO VOLTAGE
K-TCM CIRCUIT OPEN
TRANSMISSION CONTROL MODULE
TEST ACTION APPLICABILITY
1 Turn the ignition off.
Disconnect the Transmission Control Module harness connectors.
Check each power and ground circuit to the module.
Were any problems found?All
Ye s!Refer to the wiring diagrams located in the service information to
help isolate an open or shorted condition. Repair as necessary.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 2
2 Turn the ignition off.
Disconnect the TCM harness connectors.
Disconnect the DRBIIItfrom the DLC.
Measure the resistance between ground and the K-TCM circuit.
Is the resistance below 5.0 ohms?All
Ye s!Repair the K-TCM circuit for a short to ground.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 3
3 Turn the ignition off.
Disconnect the DRBIIItfrom the DLC.
Disconnect the TCM harness connectors.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the K-TCM circuit.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?All
Ye s!Repair the K-TCM circuit for a short to voltage.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Go To 4
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COMMUNICATION

TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the TCM harness connectors.
Disconnect the DRBIIItfrom the DLC.
Measure the resistance of the K-TCM circuit between the TCM connector and the
DLC.
Is the resistance below 5.0 ohms?All
Ye s!Replace the Transmission Control Module in accordance with the
Service Information.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
No!Repair the K-TCM circuit for an open.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.
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COMMUNICATION
*NO RESPONSE FROM TRANSMISSION CONTROL MODULE ÐContinued

Symptom:
CAN BUS CIRCUIT
POSSIBLE CAUSES
CAN COMMUNICATION FAILURE
CAN BUS (+) OR (-) OPEN
SHIFT LEVER ASSEMBLY
TEST ACTION APPLICABILITY
1 With the DRBIIIt, read the stored and active DTCs for all modules on the CAN bus.
Are other modules reporting CAN bus DTCs?All
Ye s!Refer to the reporting category and perform the appropriate
symptom. If the ECM is reporting a CAN bus failure, refer to its
respective test first.
No!Go To 2
2 Turn the ignition off to the lock position.
Disconnect the ECM harness connector.
Disconnect the SLA harness connector.
Measure the resistance of both the CAN bus (+) and CAN bus (-) circuits from the
ECM harness connector to the SLA harness connector.
Is the resistance above 5.0 ohms and/or either circuit?All
Ye s!Repair the CAN bus (+) and/or (-) circuits for an open.
No!Replace the Shift Lever Assembly per the Service Information.
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SHIFT LEVER ASSEMBLY