2006 MERCEDES-BENZ SPRINTER Service Manual

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Page 497 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
1NOTE: 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 E

TEST ACTION APPLICABILITY
1NOTE: 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.
NOTE: The APP Sensor is a device that contains 2 separate potentiometer
type sensors. Each sensor has its own 5-volt supply circuit, sensor ground
circuit and signal circuit. The APP Sensor no longer incorporates a low-idle
switch.
NOTE: The APP Sensor 2 signal should always be approximately 1/2 the
voltage of the APP Sensor 1 signal.
Turn the ignition on.
Using a voltmeter, backprobe the APP Sensor 1 and APP Sensor 2 Signal circuits at
the APP Sensor harness connector with the accelerator pedal in the at rest position.
Is the voltage between 0.28 and 0.37 volt for sensor 1 and 0.10 and 0.19 volt for sensor
2?All
Ye s!Go To 2
No!Go To 5
2 Turn the ignition on.
Fully depress the accelerator pedal.
Using a voltmeter backprobe the APP Sensor harness connector and read the voltage
for APP Sensor 1 and APP Sensor 2 Signal circuits.
Is the voltage between 4.45 and 4.75 volts for #1 and 2.15 and 2.45 volts for #2?All
Ye s!Go To 3
No!Go To 5
3 Turn the ignition on.
With the DRB, read the APP Sensor 1 and APP Sensor 2 percentages (%).
With the accelerator pedal in the idle position, slowly depress the accelerator pedal
until the pedal is fully depressed.
NOTE: The percentage readings for APP Sensors 1 and 2 should increase
smoothly as the pedal is depressed.
NOTE: This test can also performed using a voltmeter by back probing each
APP Sensor Signal circuit at the APP Sensor harness connector and
observing the voltmeter for a smooth voltage change through the entire
pedal travel.
Does the percentage (voltage) increase smoothly for both readings with the acceler-
ator pedal travel?All
Ye s!Go To 4
No!Replace the Accelerator Pedal Position Sensor in accordance with
the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
74
DRIVEABILITY - DIESEL
P1222-ACC PEDAL POSITION SENSOR 1 CKT PLAUSIBILITY ÐContinued

Page 498 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
4WARNING: 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: Th

TEST ACTION APPLICABILITY
4WARNING: 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 and 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 by slowly pressing and releasing the
accelerator pedal several times.
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
Ye s!Repair as necessary.
Perform ROAD TEST VERIFICATION - VER-2.
No!Test Complete.
5NOTE: Perform the rest of this diagnostic procedure on the individual APP
Sensor Potentiometer (1 or 2) that did not display the correct voltages in the
previous test.
Turn the ignition off.
Disconnect the APP Sensor harness connector.
Turn the ignition on.
Measure the voltage of the 5-Volt Supply circuit in the APP Sensor harness connector.
Is the voltage between 4.7 and 5.3 volts?All
Ye s!Go To 6
No!Go To 14
6 Turn the ignition off.
Disconnect the APP Sensor harness connector.
Connect a jumper wire between APP Sensor Signal circuit and the 5-volt supply
circuit at the APP Sensor harness connector .
With the DRB, read the PEDAL OUTPUT VOLTS.
Does the DRB display between 4.0 and 5.5 volts?All
Ye s!Go To 7
No!Go To 10
7 Turn the ignition off.
Disconnect the APP Sensor 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 APP Sensor Ground circuit.
Is the voltage above 1.0 volt?All
Ye s!Repair the App Sensor Ground circuit for a short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
No!Go To 8
75
DRIVEABILITY - DIESEL
P1222-ACC PEDAL POSITION SENSOR 1 CKT PLAUSIBILITY ÐContinued

Page 499 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
8 Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Measure the resistance of the Sensor Ground circuit between the A

Page 500 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
13 Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the Engine Control Relay.
Connect a jumper wire between c

Page 501 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
17 Turn the ignition off.
Disconnect the APP Sensor harness connector.
Disconnect the ECM harness connectors.
Remove the Engine Control Relay.
Connect a jumper wire between c

Page 502 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual Symptom:
P1480-GLOW PLUG INDICATOR ERROR
When Monitored and Set Condition:
P1480-GLOW PLUG INDICATOR ERROR
When Monitored: Witth the ignition on.
Set Condition: the ECM recieves a glow plug inidcator

Page 503 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual Symptom List:
P1482-GLOW PLUG MODULE - COMMUNICATION ERROR
P2537-GLOW PLUG CONTROL CIRCUIT PREGLOW FAULT
P2537-GLOW PLUG CONTROL CIRCUIT PREGLOW SHORT TO
GROUND
P2537-GLOW PLUG CONTROL CIRCUIT PREGLOW

Page 504 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Glow Plug Module harness connectors.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Glow Plug Co

TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the Glow Plug Module harness connectors.
Disconnect the ECM harness connectors.
Measure the resistance between ground and the Glow Plug Control Signal circuit.
Is the resistance above 1000 ohms?All
Ye s!Go To 4
No!Repair the Glow Plug Control Signal circuit for a short to ground.
Perform ROAD TEST VERIFICATION - VER-2.
4 Turn the ignition off.
Disconnect the Glow Plug Module harness connectors.
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.
Measure the voltage of the Glow Plug Control Signal circuit.
Is the voltage below 1.0 volt?All
Ye s!Go To 5
No!Repair the Glow Plug Control Signal circuit for a short to voltage.
Perform ROAD TEST VERIFICATION - VER-2.
5 Turn the ignition off.
Replace the Glow Plug Module in accordance with the Service Information.
Turn the ignition on.
With the DRBIIIt, erase ECM DTCs.
Perform several engine run cycles, turning the ignition off for at least 20 seconds
between each engine run cycle.
With the DRBIIIt, read the ECM DTCs.
Did this DTC set again?All
Ye s!Replace and program the Engine Control Module in accordance
with the Service Information.
Perform ROAD TEST VERIFICATION - VER-2.
No!Test Complete.
6WARNING: 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
Ye s!Repair as necessary.
Perform ROAD TEST VERIFICATION - VER-2.
No!Test Complete.
81
DRIVEABILITY - DIESEL
P1482-GLOW PLUG MODULE - COMMUNICATION ERROR ÐContinued

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