Mercedes-Benz Sprinter / Dodge Sprinter. Manual — part 139

Symptom List:

P2110-BOOST PRESSURE SERVO MOTOR CIRCUIT SHORT CIR-
CUIT
P2112-BOOST PRESSURE SERVO MOTOR CIRCUIT EXCESSIVE
CURRENT
P2526-BOOST PRESSURE SERVO MOTOR SHORT TO VOLTAGE

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be P2110-BOOST PRESSURE
SERVO MOTOR CIRCUIT SHORT CIRCUIT.

When Monitored and Set Condition:

P2110-BOOST PRESSURE SERVO MOTOR CIRCUIT SHORT CIRCUIT

When Monitored:

With the ignition on.

Set Condition:

The ECM detects a short to battery on the Boost Pressure Servo Motor

Control circuit.

POSSIBLE CAUSES

INTERMITTENT CONDITION

BOOST PRESSURE SERVO MOTOR

BOOST PRESSURE SERVO MOTOR CONTROL SHORT TO VOLTAGE

ENGINE CONTROL MODULE - INTERNAL

ENGINE CONTROL MODULE - INTERNAL SHORT TO VOLTAGE

TEST

ACTION

APPLICABILITY

1

NOTE: If DTC P1611, P2306 or P2332 is present with this DTC, diagnose
DTCs P1611, P2306 or P2332 before diagnosing this DTC.
NOTE: If the ECM detects and stores a DTC, the ECM also stores the
engine/vehicle operating conditions under which the DTC was set. Some of
these conditions are displayed on the DRB at the same time the DTC is
displayed.
NOTE: Before erasing stored DTCs, record these conditions. Attempting to
duplicate these conditions may assist when checking for an active DTC.
Turn the ignition on.
With the DRB, erase ECM DTCs.
Test drive the vehicle and monitor the DRB for ECM DTCs.
Did this DTC set again?

All

Yes

→ Go To 2

No

→ Go To 5

164

DRIVEABILITY - DIESEL

TEST

ACTION

APPLICABILITY

2

Turn the ignition off.
Disconnect the Boost Pressure Servo Motor harness connector.
Turn the ignition on.
With the DRB, erase ECM DTCs.
Monitor the DRB for ECM DTCs.
Does the DRB display BOOST PRESSURE SERVO MOTOR OPEN CIRCUIT?

All

Yes

→ Replace the Boost Pressure Servo Motor.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Go To 3

3

Turn the ignition off.
Disconnect the Boost Pressure Servo Motor harness connector.
Turn the ignition on.
Measure the voltage of the Boost Pressure Servo Motor Control circuit.
Is the voltage below 0.5 volt?

All

Yes

→ Replace and program the Engine Control Module in accordance

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

No

→ Go To 4

4

Turn the ignition off.
Disconnect the Boost Pressure Servo Motor harness connector.
Disconnect the ECM harness connectors.
Remove the Engine Control Relay.
Connect a jumper wire between cavity 30 and cavity 87 of the Engine Control Relay
connector.
Turn the ignition on.
Measure the voltage of the Boost Pressure Servo Motor Control circuit.
Is the voltage below 0.5 volt?

All

Yes

→ Replace and program the Engine Control Module in accordance

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

No

→ Repair the Boost Pressure Servo Motor Control circuit for a short

to voltage.
Perform ROAD TEST VERIFICATION - VER-2.

165

DRIVEABILITY - DIESEL

P2110-BOOST PRESSURE SERVO MOTOR CIRCUIT SHORT CIRCUIT —

Continued

TEST

ACTION

APPLICABILITY

5

WARNING: WHEN THE ENGINE IS OPERATING, DO NOT STAND IN A
DIRECT LINE WITH THE FAN. DO NOT PUT YOUR HANDS NEAR THE
PULLEYS, BELTS OR FAN. DO NOT WEAR LOOSE CLOTHING.
NOTE: The conditions that set the DTC are not present at this time. The
following list may help in identifying the intermittent condition.
With the engine running at normal operating temperature, monitor the DRB
parameters related to the DTC while wiggling the wiring harness. Look for param-
eter values to change and/or a DTC to set.
Review the DTC When Monitored and Set Conditions. If possible, try to duplicate the
conditions under which the DTC was set.
Refer to any Technical Service Bulletins (TSB) that may apply.
Visually inspect the related wiring harness. Look for any chafed, pierced, pinched, or
partially broken wires.
Visually inspect the related wiring harness connectors. Look for broken, bent, pushed
out, or corroded terminals.
Were any of the above conditions present?

All

Yes

→ Repair as necessary.

Perform ROAD TEST VERIFICATION - VER-2.

No

→ Test Complete.

166

DRIVEABILITY - DIESEL

P2110-BOOST PRESSURE SERVO MOTOR CIRCUIT SHORT CIRCUIT —

Continued

Symptom List:

P2111-BOOST PRESSURE SERVO MOTOR CIRCUIT SHORT TO
GROUND
P2112-BOOST PRESSURE SERVO MOTOR CIRCUIT OPEN CIR-
CUIT
P2510-BOOST PRESSURE SERVO MOTOR SHORT TO GROUND
P2526-BOOST PRESSURE SERVO MOTOR OPEN CIRCUIT
P2526-BOOST PRESSURE SERVO MOTOR SHORT TO GROUND

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be P2111-BOOST PRESSURE
SERVO MOTOR CIRCUIT SHORT TO GROUND.

When Monitored and Set Condition:

P2111-BOOST PRESSURE SERVO MOTOR CIRCUIT SHORT TO GROUND

When Monitored:

With the ignition on.

Set Condition:

The ECM detects a short to battery on the Boost Pressure Servo Motor

Control circuit.

P2112-BOOST PRESSURE SERVO MOTOR CIRCUIT OPEN CIRCUIT

When Monitored:

With the ignition on.

Set Condition:

The ECM detects an open or short to ground on the Boost Pressure Servo

Motor Control circuit.

POSSIBLE CAUSES

CHECKING THE ENGINE CONTROL RELAY SYSTEM

INTERMITTENT CONDITION

12 VOLT SUPPLY CIRCUIT OPEN

BOOST PRESSURE SERVO MOTOR CONTROL CIRCUIT SHORTED TO GROUND

BOOST PRESSURE SERVO MOTOR CONTROL CKT OPEN

BOOST PRESSURE SERVO MOTOR

ENGINE CONTROL MODULE

167

DRIVEABILITY - DIESEL