Mercedes-Benz Sprinter / Dodge Sprinter. Manual - part 118

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 SHORT TO
VOLTAGE

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be P1482-GLOW PLUG MODULE -
COMMUNICATION ERROR.

POSSIBLE CAUSES

ENGINE CONTROL MODULE

GLOW PLUG CONTROL SIGNAL CIRCUIT OPEN

GLOW PLUG CONTROL SIGNAL CIRCUIT SHORTED TO GROUND

GLOW PLUG CONTROL SIGNAL CIRCUIT SHORTED TO VOLTAGE

GLOW PLUG MODULE

INTERMITTENT CONDITION

TEST

ACTION

APPLICABILITY

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.
Perform several engine run cycles, turning the ignition off for at least 20 seconds
between each engine run cycle.
Turn the ignition on.
With the DRB, read ECM DTCs.
Did this DTC set again?

All

Yes

→ Go To 2

→ Go To 6

Turn the ignition off.
Disconnect the Glow Plug Module harness connectors.
Disconnect the ECM harness connectors.
Measure the resistance of the Glow Plug Control Signal circuit.
Measure the resistance of the Glow Plug Module Control circuit.
Is the resistance below 10.0 ohms?

All

Yes

→ Go To 3

→ Repair the Glow Plug Control Signal circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

DRIVEABILITY - DIESEL

TEST

ACTION

APPLICABILITY

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

Yes

→ Go To 4

→ Repair the Glow Plug Control Signal circuit for a short to ground.

Perform ROAD TEST VERIFICATION - VER-2.

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

Yes

→ Go To 5

→ Repair the Glow Plug Control Signal circuit for a short to voltage.

Perform ROAD TEST VERIFICATION - VER-2.

Turn the ignition off.
Replace the Glow Plug Module in accordance with the Service Information.
Turn the ignition on.
With the DRBIII

t, erase ECM DTCs.

Perform several engine run cycles, turning the ignition off for at least 20 seconds
between each engine run cycle.
With the DRBIII

t, read the ECM DTCs.

Did this DTC set again?

All

Yes

→ Replace and program the Engine Control Module in accordance

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

→ Test Complete.

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.

→ Test Complete.

DRIVEABILITY - DIESEL

P1482-GLOW PLUG MODULE - COMMUNICATION ERROR —

Continued

Symptom List:

P1482-GLOW PLUG MODULE - EXCESS CURRENT
P2133-GLOW PLUG #1 CIRCUIT EXCESSIVE CURRENT
P2133-GLOW PLUG #1 CIRCUIT OPEN CIRCUIT
P2133-GLOW PLUG #1 CIRCUIT SHORT TO GROUND
P2133-GLOW PLUG #1 CIRCUIT SHORT TO VOLTAGE
P2134-GLOW PLUG #2 CIRCUIT EXCESSIVE CURRENT
P2134-GLOW PLUG #2 CIRCUIT OPEN CIRCUIT
P2134-GLOW PLUG #2 CIRCUIT SHORT TO GROUND
P2134-GLOW PLUG #2 CIRCUIT SHORT TO VOLTAGE
P2135-GLOW PLUG #3 CIRCUIT EXCESSIVE CURRENT
P2135-GLOW PLUG #3 CIRCUIT OPEN CIRCUIT
P2135-GLOW PLUG #3 CIRCUIT SHORT TO GROUND
P2135-GLOW PLUG #3 CIRCUIT SHORT TO VOLTAGE
P2136-GLOW PLUG #4 CIRCUIT EXCESSIVE CURRENT
P2136-GLOW PLUG #4 CIRCUIT OPEN CIRCUIT
P2136-GLOW PLUG #4 CIRCUIT SHORT TO GROUND
P2136-GLOW PLUG #4 CIRCUIT SHORT TO VOLTAGE
P2137-GLOW PLUG #5 CIRCUIT EXCESSIVE CURRENT
P2137-GLOW PLUG #5 CIRCUIT OPEN CIRCUIT
P2137-GLOW PLUG #5 CIRCUIT SHORT TO GROUND
P2137-GLOW PLUG #5 CIRCUIT SHORT TO VOLTAGE

Test Note:

All symptoms listed above are diagnosed using the same tests.

The title for the tests will be P1482-GLOW PLUG MODULE -
EXCESS CURRENT.

POSSIBLE CAUSES

GLOW PLUG

GLOW PLUG CONTROL CIRCUIT OPEN

GLOW PLUG CONTROL CIRCUIT SHORTED TO GROUND

GLOW PLUG CONTROL CIRCUIT SHORTED TO VOLTAGE

GLOW PLUG MODULE

INTERMITTENT CONDITION

DRIVEABILITY - DIESEL

TEST

ACTION

APPLICABILITY

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.
Perform several ignition cycles leaving the ignition on for at least 10 seconds then off
for 10 seconds.
With the DRBIII

t, read the ECM DTCs.

Did this DTC set again?

All

Yes

→ Go To 2

→ Go To 6

Turn the ignition off.
Disconnect each Glow Plug harness connector.
Disconnect the Glow Plug Module harness connector.
Measure the resistance of each Glow Plug Control circuit.
Is the resistance below 10.0 ohms for each circuit?

All

Yes

→ Go To 3

→ Repair the appropriate Glow Plug Control circuit for an open.

Perform ROAD TEST VERIFICATION - VER-2.

Turn the ignition off.
Disconnect each Glow Plug harness connector.
Disconnect the Glow Plug Module harness connector.
Measure the resistance between ground and each Glow Plug Control circuit.
Is the resistance below 1000.0 ohms for any of the measurements?

All

Yes

→ Repair the appropriate Glow Plug Control circuit for a short to

ground.
Perform ROAD TEST VERIFICATION - VER-2.

→ Go To 4

Turn the ignition off.
Disconnect each Glow Plug harness connector.
Disconnect the Glow Plug Module harness connector.
Turn the ignition on.
Measure the voltage of each Glow Plug Control circuit.
Is the voltage below 1.0 volt for each circuit?

All

Yes

→ Go To 5

→ Repair the appropriate Glow Plug Control circuit for a short to

voltage
Perform ROAD TEST VERIFICATION - VER-2.

DRIVEABILITY - DIESEL

P1482-GLOW PLUG MODULE - EXCESS CURRENT —

Continued

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