Mercedes-Benz Sprinter / Dodge Sprinter. Service manual — part 533
Symptom:
BACKUP LAMP CKT SHORT TO GROUND
POSSIBLE CAUSES
BACKUP LAMP CIRCUIT SHORT TO GROUND
SHIFT LEVER ASSEMBLY
TEST
ACTION
APPLICABILITY
1
Turn the ignition off to the lock position.
Disconnect the Shift Lever Assembly harness connector.
Isolate the Backup Lamp circuit, remove the Backup Lamp bulbs.
NOTE: Check Backup Lamp bulbs and socket for a short or corrosion.
Measure the resistance between ground and the Backup Lamp circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Backup Lamp circuit for a short to ground.
No
→ Replace the Shift Lever Assembly per the Service Information.
14
SHIFT LEVER ASSEMBLY
Symptom:
BACKUP LAMP CKT SHORT TO VOLTAGE OR OPEN
POSSIBLE CAUSES
BACKUP LAMP CIRCUIT OPEN
BACKUP LAMP CIRCUIT SHORT TO VOLTAGE
SHIFT LEVER ASSEMBLY
TEST
ACTION
APPLICABILITY
1
Start the engine.
While back probing, measure the voltage of the Backup Lamp circuit.
Is the voltage above 0.5 volts?
All
Yes
→ Go To 2
No
→ Go To 3
2
Turn the ignition off to the lock position.
Disconnect the Shift Lever Assembly harness connector.
Start the engine.
Measure the voltage of the Backup Lamp circuit in the Shift Lever Assembly harness
connector.
Is the voltage above 0.5 volts?
All
Yes
→ Repair the Backup Lamp circuit for a short to voltage.
No
→ Replace the Shift Lever Assembly per the Service Information.
3
Turn the ignition off to the lock position.
Disconnect the Shift Lever Assembly harness connector.
Remove the Backup Lamp bulb(s).
Connect a jumper wire between Shift Lever Assembly circuit and B(+).
Using a 12-volt test light connected to 12-volts, check the Backup Lamp circuit in the
Backup Lamp socket(s).
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?
All
Yes
→ Replace the Shift Lever Assembly per the Service Information.
No
→ Repair the Backup Lamp circuit for an open.
15
SHIFT LEVER ASSEMBLY
Symptom:
BACKUP LAMP SUPPLY CIRCUIT OPEN
POSSIBLE CAUSES
FUSED IGNITION SWITCH OUTPUT OPEN
SHIFT LEVER ASSEMBLY
TEST
ACTION
APPLICABILITY
1
Turn the ignition off to the lock position.
Disconnect the Shift Lever Assembly harness connector.
Start the engine.
Using a 12-volt test light connected to ground, check the Fused Ignition Switch
Output circuit.
NOTE: The test light must illuminate brightly. Compare the brightness to
that of a direct connection to the battery.
Does the test light illuminate brightly?
All
Yes
→ Replace the Shift Lever Assembly per the Service Information.
No
→ Repair the Fused Ignition Switch Output circuit for an open. If
the fuse is open, make sure to check for a short to ground.
16
SHIFT LEVER ASSEMBLY
Symptom:
CAN BUS CIRCUIT
POSSIBLE CAUSES
CAN COMMUNICATION FAILURE
CAN BUS (+) OR (-) OPEN
SHIFT LEVER ASSEMBLY
TEST
ACTION
APPLICABILITY
1
With the DRBIII
t, read the stored and active DTCs for all modules on the CAN bus.
Are other modules reporting CAN bus DTCs?
All
Yes
→ Refer to the reporting category and perform the appropriate
symptom. If the ECM is reporting a CAN bus failure, refer to its
respective test first.
No
→ Go To 2
2
Turn the ignition off to the lock position.
Disconnect the ECM harness connector.
Disconnect the SLA harness connector.
Measure the resistance of both the CAN bus (+) and CAN bus (-) circuits from the
ECM harness connector to the SLA harness connector.
Is the resistance above 5.0 ohms and/or either circuit?
All
Yes
→ Repair the CAN bus (+) and/or (-) circuits for an open.
No
→ Replace the Shift Lever Assembly per the Service Information.
17
SHIFT LEVER ASSEMBLY
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