2006 MERCEDES-BENZ SPRINTER Service Manual

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Page 337 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
4 Turn the ignition off.
Disconnect the Brake Pressure Sensor harness connector.
Disconnect the CAB harness connector.
Measure the resistance of the Brake Pressure Sensor sig

Page 338 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual Symptom:
BRAKE SWITCH CIRCUIT
When Monitored and Set Condition:
BRAKE SWITCH CIRCUIT
When Monitored: Ignition On - Continuously
Set Condition: When the brake lamp switch and brake switch outputs are b

Page 339 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
2NOTE: This DTC will set if the Brake Switch, the Brake Lamp Switch, or
both switches are inoperative. It will be necessary to verify the functional-
ity of each switch.
NOTE

Page 340 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
6 Turn the ignition off.
Disconnect the appropriate brake switch harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fused Igni

TEST ACTION APPLICABILITY
6 Turn the ignition off.
Disconnect the appropriate brake switch harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fused Ignition Switch
Output circuit at the harness connector.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Is the test light illuminated and bright?All
Ye s!Go To 7
No!Repair the Fused Ignition Switch Output circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
7 Turn the ignition off.
Disconnect the CAB harness connector.
Disconnect the appropriate brake switch harness connector.
Turn the ignition on.
Measure the voltage of the output circuit at the brake switch harness connector.
NOTE: Measurement is taken at the Brake Switch Output circuit or the
Brake Lamp Output circuit as determined by the previously performed
switch test.
Is there any voltage present?All
Ye s!Repair the affected circuit for a short to voltage.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 8
8 Turn the ignition off.
Disconnect the CAB harness connector.
Disconnect the appropriate brake switch harness connector.
Measure the resistance between ground and switch output circuit at the switch
connector.
NOTE: Measurement is taken at the Brake Switch Output circuit or the
Brake Lamp Output circuit as determined by the previously performed
switch test.
Is the resistance below 5.0 ohms?All
Ye s!Repair the affected circuit for a short to ground.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 9
9 Turn the ignition off.
Disconnect the CAB harness connector.
Disconnect the appropriate brake switch harness connector.
Measure the resistance of the output circuit between the switch harness connector
and the CAB harness connector.
NOTE: Measurement is taken at the Brake Switch Output circuit or the
Brake Lamp Output circuit as determined by the previously performed
switch test.
Is the resistance above 5.0 ohms?All
Ye s!Repair the affected circuit for an open.
Perform ABS VERIFICATION TEST - VER 1.
No!Go To 10
19
BRAKES (CAB)
BRAKE SWITCH CIRCUIT ÐContinued

Page 341 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
10 Turn the ignition off.
Disconnect the CAB harness connector.
Disconnect the C1 Brake Switch and C2 Brake Lamp Switch harness connectors.
Measure the resistance between the

Page 342 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual Symptom:
CAB CHECK SUM
When Monitored and Set Condition:
CAB CHECK SUM
When Monitored: Ignition On - Once
Set Condition: When the sum of all storage bytes are not equal to the original sum stored.
POS

Page 343 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual TEST ACTION APPLICABILITY
3 Turn the ignition off.
Disconnect the CAB harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Fused Optional Equipment
Relay

Page 344 of 2305

MERCEDES-BENZ SPRINTER 2006 Service Manual Symptom:
CAB OPTION
When Monitored and Set Condition:
CAB OPTION
When Monitored: Ignition On - Once
Set Condition: When the vehicle line information transmitted does not match the
expected values.
POS

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