Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 558

TEST

ACTION

APPLICABILITY

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

Yes

→ Repair as necessary

Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

No

→ Test Complete.

114

TRANSMISSION - NAG1

TCC SOLENOID CIRCUIT —

Continued

Symptom:

TCC STUCK ON

When Monitored and Set Condition:

TCC STUCK ON

When Monitored:

No Input Speed Sensor N2 - N3, CAN C Bus, PCM/ECM, CAN Engine,

No CAN Engine Torque and/or Shift in progress DTCs present. Must be in a valid forward
gear.

Set Condition:

Engine RPM - Turbine Speed is greater than 30 RPM when the Engine

torque is less than 100 NM for 1.0 second

POSSIBLE CAUSES

TCC SOLENOID CONTROL CIRCUIT SHORT TO GROUND

TCC SOLENOID CONTROL CIRCUIT SHORT TO OTHER CIRCUITS

INTERNAL TRANSMISSION

TCM - TCC STUCK ON

TEST

ACTION

APPLICABILITY

1

NOTE: Low fluid level can be the cause of many transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the service information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIII

t, read the engine DTCs. Check and repair all engine DTCs prior to

performing transmission symptom diagnostics.
With the DRBIII

t, read and record all Transmission DTCs.

NOTE: Check connectors - Clean/repair as necessary. Poor pin to terminal
connections can set DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Most DTCs set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
Note: Verify flash level of transmission controller. Some problems are
corrected by software upgrades to the transmission controller.
NOTE: Check for any Technical Service Bulletins that may apply.
Perform this procedure prior to Symptom diagnosis.

All

Continue

Go To

2

115

TRANSMISSION - NAG1

TEST

ACTION

APPLICABILITY

2

Turn the ignition off to the lock position.
Disconnect the Transmission Solenoid Assembly harness connector.
Start the engine.
With the brakes firmly applied, shift the gear selector into Drive.
Did the engine stall or stumble?

All

Yes

→ Repair the internal transmission. Pay particular attention to the

components related to the TCC. Refer to the Service Information
for the proper repair procedure.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

No

→ Go To 3

3

Turn the ignition off to the lock position.
Disconnect the TCM C2 harness connector.
Disconnect the Transmission Solenoid Assembly harness connector.
Measure the resistance between ground and the TCC Solenoid Control circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the TCC Solenoid Control circuit for a short to ground.

Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

No

→ Go To 4

4

Turn the ignition off to the lock position.
Disconnect the TCM C2 harness connector.
Disconnect the Transmission Solenoid harness connector.
Measure the resistance of the TCC Solenoid Control circuit to all other circuits in the
Transmission Solenoid harness connector.
Is the resistance below 5.0 ohms on any circuit?

All

Yes

→ Repair the TCC Solenoid Control circuit for a short to other

circuits.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

No

→ Replace the Transmission Control Module.

Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

116

TRANSMISSION - NAG1

TCC STUCK ON —

Continued

Symptom:

TRANS TEMP SENSOR - P/N SWITCH CIRCUIT

When Monitored and Set Condition:

TRANS TEMP SENSOR - P/N SWITCH CIRCUIT

When Monitored:

Always monitored with system active at each ignition cycle.

Set Condition:

Temp sensor is open while in forward gears (1-5), temp sensor, open Trans

temp circuit, P/N Switch.

POSSIBLE CAUSES

SHIFTER ADJUSTMENT

SENSOR GROUND CIRCUIT OPEN

TEMP SENSOR - P/N SWITCH CIRCUIT OPEN

TEMP SENSOR - P/N SWITCH CIRCUIT SHORT TO GROUND

SENSOR GROUND CIRCUIT SHORT TO OTHER CIRCUITS

TEMP SENSOR- P/N SWITCH CIRCUIT SHORT TO OTHER CIRCUITS

TEMP SENSOR - P/N SWITCH

TCM - TEMP SENSOR - P/N SWITCH

TEST

ACTION

APPLICABILITY

1

NOTE: Low fluid level can be the cause of many transmission problems. If
the fluid level is low locate and repair the leak then check and adjust the
fluid level per the service information.
NOTE: Always perform diagnostics with a fully charged battery to avoid
false symptoms.
With the DRBIII

t, read the engine DTCs. Check and repair all engine DTCs prior to

performing transmission symptom diagnostics.
With the DRBIII

t, read and record all Transmission DTCs.

NOTE: Check connectors - Clean/repair as necessary. Poor pin to terminal
connections can set DTCs.
Using the wiring diagram/schematic as a guide, inspect the wiring and connectors.
Repair as necessary.
Most DTCs set on start up but some must be set by driving the vehicle such that all
diagnostic monitors have run.
Note: Verify flash level of transmission controller. Some problems are
corrected by software upgrades to the transmission controller.
NOTE: Check for any Technical Service Bulletins that may apply.
Perform this procedure prior to Symptom diagnosis.

All

Continue

Go To

2

117

TRANSMISSION - NAG1