Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 101

Symptom:

*NO RESPONSE FROM ENGINE CONTROL MODULE

POSSIBLE CAUSES

CHECK POWERS AND GROUNDS TO THE ENGINE CONTROL MODULE

K-ECM CIRCUIT SHORTED TO GROUND

K-ECM CIRCUIT SHORTED TO VOLTAGE

K-ECM CIRCUIT OPEN

ENGINE CONTROL MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the Engine Control Module harness connectors.
Check each power and ground circuit to the module.
Were any problems found?

All

Yes

→ Refer to the wiring diagrams located in the service information to

help isolate an open or shorted condition. Repair as necessary.
Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 2

2

Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the DRBIII

t from the DLC.

Measure the resistance between ground and the K-ECM circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the K-ECM circuit for a short to ground.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 3

3

Turn the ignition off.
Disconnect the DRBIII

t from the DLC.

Disconnect the ECM harness connectors.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the K-ECM 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

Yes

→ Repair the K-ECM circuit for a short to voltage.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 4

12

COMMUNICATION

TEST

ACTION

APPLICABILITY

4

Turn the ignition off.
Disconnect the ECM harness connectors.
Disconnect the DRBIII

t from the DLC.

Measure the resistance of the K-ECM circuit between the ECM connector and the
DLC.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace and program the Engine Control Module in accordance

with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.

No

→ Repair the K-ECM circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

13

COMMUNICATION

*NO RESPONSE FROM ENGINE CONTROL MODULE —

Continued

Symptom:

*NO RESPONSE FROM SENTRY KEY REMOTE ENTRY MODULE

POSSIBLE CAUSES

CHECK POWERS AND GROUNDS TO THE SENTRY KEY REMOTE ENTRY MODULE

K-SKREEM CIRCUIT SHORTED TO GROUND

K-SKREEM CIRCUIT SHORTED TO VOLTAGE

K-SKREEM CIRCUIT OPEN

SENTRY KEY REMOTE ENTRY MODULE

TEST

ACTION

APPLICABILITY

1

Turn the ignition off.
Disconnect the SKREEM harness connector.
Check each power and ground circuit to the module.
Were any problems found?

All

Yes

→ Refer to the wiring diagrams located in the service information to

help isolate an open or shorted condition. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 2

2

Turn the ignition off.
Disconnect the SKREEM harness connector.
Disconnect the DRBIII

t from the DLC.

Measure the resistance between ground and the K-SKREEM circuit.
Is the resistance below 5.0 ohms?

All

Yes

→ Repair the K-SKREEM circuit for a short to ground.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 3

3

Turn the ignition off.
Disconnect the DRBIII

t from the DLC.

Disconnect the SKREEM harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, probe the K-SKREEM 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

Yes

→ Repair the K-SKREEM circuit for a short to voltage.

Perform BODY VERIFICATION TEST - VER 1.

No

→ Go To 4

14

COMMUNICATION

TEST

ACTION

APPLICABILITY

4

Turn the ignition off.
Disconnect the SKREEM harness connector.
Disconnect the DRBIII

t from the DLC.

Measure the resistance of the K-SKREEM circuit between the SKREEM connector
and the DLC.
Is the resistance below 5.0 ohms?

All

Yes

→ Replace and program the Sentry Key Remote Entry Module in

accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.

No

→ Repair the K-SKREEM circuit for an open.

Perform BODY VERIFICATION TEST - VER 1.

15

COMMUNICATION

*NO RESPONSE FROM SENTRY KEY REMOTE ENTRY MODULE —

Continued