Mercedes-Benz Sprinter / Dodge Sprinter. Service manual — part 146
Symptom List:
P2242-ABS BRAKE MESSAGE PLAUSIBILITY 1
P2242-ABS BRAKE MESSAGE PLAUSIBILITY 2
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be P2242-ABS BRAKE MESSAGE
PLAUSIBILITY 1.
POSSIBLE CAUSES
CAB DTCS
CHECKING BRAKE SWITCH INPUT
CONTROLLER ANTILOCK BRAKE MODULE
TCM DTCS
VERIFY CAB COMMUNICATION
VERIFY TCM COMMUNICATION
TEST
ACTION
APPLICABILITY
1
NOTE: This DTC can be set if the vehicle operator depresses the brake pedal
and the accelerator at the same time (riding the brake pedal). Check with
vehicle operator for this type of driving behavior.
Turn the ignition on.
With the DRBIII
t attempt to communicate with the CAB.
NOTE: If there are other DTCs set with this DTC, refer to the Symptom List
and repair other stored ECM DTCs before diagnosing this DTC.
Is the CAB communicating with the DRB?
All
Yes
→ Go To 2
No
→ Refer to the appropriate symptom in the Body Diagnostic Infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition on.
With the DRBIII
t, read the CAB DTCs.
Are there any CAB DTCs?
All
Yes
→ Refer to symptom list for problems related to CAB.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition on.
With the DRBIII
t attempt to communicate with the TCM.
Is the TCM communicating with the DRB?
All
Yes
→ Go To 4
No
→ Refer to the appropriate symptom in the Body Diagnostic Infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
192
DRIVEABILITY - DIESEL
TEST
ACTION
APPLICABILITY
4
Turn the ignition on.
With the DRBIII
t, read the CAB DTCs.
Are there any CAB DTCs?
All
Yes
→ Refer to symptom list for problems related to TCM
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 5
5
Turn the ignition on.
With the DRBIII
t select TCM then Sensors. Read the Brake Switch input while
pressing and releasing the brake pedal several times.
With the DRBIII
t select CAB then Sensors. Read the Brake Switch input while
pressing and releasing the brake pedal several times.
Is the Brake Switch input operating correctly for both modules?
All
Yes
→ Replace and program the CAB in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Refer to the Service Information wiring to diagnose brake switch
problem.
Perform BODY VERIFICATION TEST - VER 1.
193
DRIVEABILITY - DIESEL
P2242-ABS BRAKE MESSAGE PLAUSIBILITY 1 —
Continued
Symptom:
P2244-INSTRUMENT CLUSTER MESSAGE PLAUSIBILITY
POSSIBLE CAUSES
ENGINE CONTROL MODULE
INSTRUMENT CLUSTER DTCS
VERIFY INSTRUMENT CLUSTER COMMUNICATION
INTERMITTENT CONDITION
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t attempt to communicate with the Instrument Cluster.
NOTE: If there are other DTCs set with this DTC, refer to the Symptom List
and repair other stored ECM DTCs before diagnosing this DTC.
Is the Instrument Cluster communicating with the DRB?
All
Yes
→ Go To 2
No
→ Refer to the appropriate symptom in the Body Diagnostic Infor-
mation.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition on.
With the DRBIII
t, read the Instrument Cluster DTCs.
Are there any Instrument Cluster DTCs?
All
Yes
→ Refer to symptom list for problems related to Instrument Cluster.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
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 DRBIII
t, erase the ECM DTCs.
Turn the ignition off then turn the ignition on and wait 60 seconds.
With the DRBIII
t, read the ECM DTCs.
Does the DRB display this DTC?
All
Yes
→ Replace and program the Engine Control Module in accordance
with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
194
DRIVEABILITY - DIESEL
TEST
ACTION
APPLICABILITY
4
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 BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
195
DRIVEABILITY - DIESEL
P2244-INSTRUMENT CLUSTER MESSAGE PLAUSIBILITY —
Continued
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