Mercedes-Benz Sprinter / Dodge Sprinter. Manual - part 61

TEST

ACTION

APPLICABILITY

Turn the ignition off.
NOTE: The Rain Sensor Module (RSM) is mounted above the accelerator
pedal assembly.
Disconnect the Rain Sensor Module harness connector.
Turn the ignition on.
Using a 12-volt test light connected to ground, check the Battery Supply circuit at the
Rain Sensor Module harness connector cavity A-1.
Does the test light illuminate brightly?

All

Yes

→ Go To 9

→ Repair the open 12 Volt Power Supply circuit.

Turn the ignition off.
Disconnect the Rain Sensor Module harness connector.
Using a 12-volt test light connected to 12 volts, check the Ground circuit at the Rain
Sensor Module harness connector cavity C-1.
Does the test light illuminate brightly?

All

Yes

→ Go To 10

→ Repair the open Ground circuit.

Turn the ignition off.
Disconnect the Rain Sensor Module harness connector.
Turn the ignition on.
Refer to the Wiper/Washer Switch Voltage Chart in Charts and Graphs to verify
correct wiper switch voltage signals to the Rain Sensor Module when the wiper
switch is adjusted to each of the four positions.
Do voltage readings at the RSM connector correspond correctly to voltages specified
in the chart?

All

Yes

→ Go To 11

→ Refer to the Rain Sensor/Wiper System Schematic in Charts and

Graphs to diagnose base wiper system problem with the circuit(s)
that did not have the correct corresponding voltage to the chart.

Turn the ignition off.
Disconnect the wiper motor harness connector.
Using a 12-volt test light connected to 12-volts, check the Ground circuit at the Wiper
Motor harness connector.
Does the test light illuminate brightly?

All

Yes

→ Go To 12

→ Repair the Wiper Motor Ground circuit for an open.

241

WINDSHIELD WIPER & WASHER

CHECKING THE RAIN SENSOR/WIPER OPERATION —

Continued

TEST

ACTION

APPLICABILITY

NOTE: Ensure the Rain Sensor Module harness connector is reconnected.
Turn the ignition off.
Disconnect the wiper motor harness connector.
Connect a voltmeter between ground and the wiper motor harness connector cavity
2 (harness side).
Turn the ignition on.
While observing the voltmeter, move the wiper switch to the OFF, INTERMITTENT,
LOW and HIGH positions.
Does the voltmeter display above 10.0 volts for each of the wiper switch positions?

All

Yes

→ Go To 13

→ Repair circuit between Wiper Motor harness connector cavity 2

and Rain Sensor Module harness connector cavity C-2 for an
open, short to ground or short to voltage. If ok, Replace the Rain
Sensor Module.

Turn the ignition off.
Disconnect the wiper motor harness connector.
Connect a voltmeter between ground and the wiper motor harness connector cavity
5 (harness side).
Move the wiper switch to the OFF position.
Turn the ignition on.
While observing the voltmeter, move the wiper switch from the OFF position to the
INTERMITTENT position only.
Does the voltmeter display above 10.0 volts for both of the wiper switch positions?

All

Yes

→ Go To 14

→ Repair circuit between Wiper Motor harness connector cavity 5

and Rain Sensor Module harness connector cavity B-8 for an
open, short to ground or short to voltage. If ok, Replace the Rain
Sensor Module.

Turn the ignition off.
Disconnect the wiper motor harness connector.
Connect a voltmeter between ground and the wiper motor harness connector cavity
5 (harness side).
Move the wiper switch to the OFF position.
Turn the ignition on.
NOTE: The voltmeter should display above 10.0 volts for approximately 20
seconds then switch to 0.0 volts.
Does the voltmeter display above 10.0 volts then switch to 0.0 volts after 20 seconds?

All

Yes

→ Go To 15

→ Repair circuit between Wiper Motor harness connector cavity 5

and Rain Sensor Module harness connector cavity B-8 for an
open, short to ground or short to voltage. If ok, Replace the Rain
Sensor Module.

242

WINDSHIELD WIPER & WASHER

CHECKING THE RAIN SENSOR/WIPER OPERATION —

Continued

TEST

ACTION

APPLICABILITY

Turn the ignition off.
Disconnect the wiper motor harness connector.
Connect a voltmeter between ground and the wiper motor harness connector cavity
6 (harness side).
Turn the ignition on.
While observing the voltmeter, move the wiper switch to the OFF, INTERMITTENT
and LOW positions.
Does the voltmeter display below 1.0 volt for each of the wiper switch positions?

All

Yes

→ Go To 16

→ Repair circuit between Wiper Motor harness connector cavity 6

and Rain Sensor Module harness connector cavity A-8 for an open,
short to ground or short to voltage. If ok, Replace the Rain Sensor
Module.

Turn the ignition off.
Disconnect the wiper motor harness connector.
Connect a voltmeter between ground and the wiper motor harness connector cavity
6 (harness side).
Move the wiper switch to the HIGH position.
Turn the ignition on.
NOTE: The voltmeter should display above 10.0 volts for approximately 20
seconds then switch to 0.0 volts.
Does the voltmeter display above 10.0 volts then switch to 0.0 volts after 20 seconds?

All

Yes

→ Replace the Wiper Motor in accordance with the Service Informa-

tion.

→ Repair circuit between Wiper Motor harness connector cavity 6

and Rain Sensor Module harness connector cavity A-8 for an open,
short to ground or short to voltage. If ok, Replace the Rain Sensor
Module.

243

WINDSHIELD WIPER & WASHER

CHECKING THE RAIN SENSOR/WIPER OPERATION —

Continued

Verification Tests

ABS VERIFICATION TEST - VER 1

APPLICABILITY

1. Turn the ignition off.
2. Connect all previously disconnected components and connectors.
3. Ensure all accessories are turned off and the battery is fully charged.
4. Ensure that the Ignition is on, and with the DRBIII, erase all Diagnostic Trouble Codes from
ALL modules. Start the engine and allow it to run for 2 minutes and fully operate the system
that was malfunctioning.
5. Turn the ignition off and wait 5 seconds. Turn the ignition on and using the DRBIII, read
DTC’s from ALL modules.
6. If any Diagnostic Trouble Codes are present, return to Symptom list and troubleshoot new
or recurring symptom.
7. NOTE: If the CAB/HCU was replaced, ensure the CAB has been initialized
8. NOTE: If the SKREEM or ECM was replaced, refer to the service information for
proper programming procedures.
9. NOTE: For Sensor Circuit/Signal and Pump Motor faults, the CAB must sense all 4
wheels at 12 km/h (8 mph) before it will extinguish the ABS Indicator.
10. If there are no DTC’s present after turning ignition on, road test the vehicle for at least 5
minutes. Perform several antilock braking stops.
11. CAUTION: Ensure braking capability is available before road testing.
12. Again, with the DRBIII

t read DTC’s. If any DTC’s are present, return to Symptom list.

13. If there are no Diagnostic Trouble Codes (DTC’s) present, and the customer’s concern can
no longer be duplicated, the repair is complete.
Are any DTC’s present or is the original concern still present?

All

Yes

→ Repair is not complete, refer to appropriate symptom.

→ Repair is complete.

AIRBAG VERIFICATION TEST - VER 1

APPLICABILITY

1. Remove any special tools or jumper wires and reconnect all previously disconnected
components - except the Battery.
2. WARNING: TO AVOID PERSONAL INJURY OR DEATH, TURN THE IGNITION ON,
THEN RECONNECT THE BATTERY.
3. Connect the DRBIII

t to the Data Link Connector - use the most current software available.

4. Use the DRBIII

t and erase the stored codes in all airbag system modules.

5. Turn the ignition off, and wait 15 seconds, then turn the ignition on.
6. Wait one minute, and read active codes and if there are none present read the stored codes.
7. Note: If equipped with Airbag On - Off switch, read the DTC’s in all switch positions.
8. Note: Read the DTC’s in all airbag system related modules.
9. If the DRBIII

t shows any active or stored codes, return to the Symptom list and follow path

specified for that trouble code. If no active or stored codes are present, the repair is complete.
Are any DTC’s present or is the original condition still present?

All

YES

Repair is not complete, refer to appropriate symptom list.

Repair is complete.

244

VERIFICATION TESTS

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