Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 561

TEST

ACTION

APPLICABILITY

2

With the DRBIII

t, read Transmission DTCs.

Are there any Improper Gear and/or Improper Ratio DTCs present?

All

Yes

→ Refer to the Transmission category and perform the appropriate

symptom.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

No

→ Go To 3

3

Verify the correct axle gear ratio and make sure there are no mechanical problems.
Refer to the Service Information for the proper procedures.
Were there any problems found?

All

Yes

→ Refer to the Service Information for proper repair procedures.

Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

No

→ Go To 4

4

Determine if the Transmission is mechanically slipping.
Is the transmission slipping?

All

Yes

→ Repair internal transmission as necessary. Refer to the Service

Information for the proper repair procedure.
Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

No

→ Replace the Transmission Control Module.

Perform NAG1 TRANSMISSION VERIFICATION TEST - VER 1.

126

TRANSMISSION - NAG1

TRANSMISSION SLIPPING —

Continued

Verification Tests

NAG1 TRANSMISSION VERIFICATION TEST - VER 1

APPLICABILITY

1. Reconnect any disconnected components.
2. Connect the DRBIII

t to the Data Link Connector.

3. With the DRBIII

t, erase ABS DTCs.

4. With the DRBIII

t, erase ECM DTCs.

5. With the DRBIII

t, erase Transmission DTCs.

6. With the DRBIII

t, display Transmission Temperature. Start and run the engine until the

Transmission Temperature is HOT, above 43° C (110° F).
7. Check the Transmission fluid and adjust if necessary. Refer to the Service Information for the
proper Fluid Fill procedure.
8. NOTE: If internal repairs were performed and the shift quality is still poor, it may
be necessary to check the internal repair. Also check for any TSBs and/or Controller
Flash updates that may apply.
9. ROAD TEST PROCEDURE
10. Road test the vehicle. Make fifteen to twenty 1-2, 2-3, 3-4 and 4-5 upshifts.
11. Perform these shifts from a standing start to 72 km/h (45 MPH) with a constant throttle
opening of 20 to 25 degrees.
12. With speeds below 40 km/h (25 MPH), make five to eight wide open throttle kickdowns to
1st gear. Allow at least 5 seconds each in 2nd and 3rd gear between each kickdown.
13. With the DRBIII

t, read Transmission DTCs.

Were there any Diagnostic Trouble Codes set?

All

Yes

→ Repair is not complete, refer to appropriate symptom.

No

→ Repair is complete.

127

VERIFICATION TESTS

NOTES

128

8.0

COMPONENT LOCATIONS

8.1

ENGINE CONTROL MODULE

8.2

TRANSMISSION CONTROL MODULE

8.3

TRANSMISSION SOLENOID ASSEMBLY

C

O

M

P

O
N

E

N

T

L

O

C
A

T

I

O
N

S

129

COMPONENT LOCATIONS