Chrysler Town, Dodge Caravan. Manual — part 817
Symptom:
TURN SIGNAL SWITCH INPUT OPEN
When Monitored and Set Condition:
TURN SIGNAL SWITCH INPUT OPEN
When Monitored:
Ignition on.
Set Condition:
When voltage is below 4.8 volts.
POSSIBLE CAUSES
INTERMITTENT CONDITION
MULTIFUNCTION SWITCH
TURN SIGNAL SWITCH MUX CIRCUIT OPEN
MULTIFUNCTION SWITCH MUX RETURN CIRCUIT OPEN
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all BCM DTC’s.
Actuate the turn signals.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Turn Signal Switch Input Open?
All
Yes
→ Go To 2
No
→ The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced,pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Multifunction Switch harness connector.
Connect a jumper wire between the Turn Signal Switch MUX circuit and the
Multifunction Switch MUX Return circuit in the Multifunction Switch connector.
Turn the ignition on.
With the DRBIII
t, read the Multifunction Switch voltage.
Is the display voltage below 0.5 volts?
All
Yes
→ Replace the Multifunction Switch.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
504
EXTERIOR LIGHTING
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the Body Control Module C5 harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance of the Turn Signal Switch MUX circuit from the Body Control
Module connector to the Multifunction Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Turn Signal Switch MUX circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
4
Turn the ignition off.
Disconnect the Body Control Module C4 harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance of the Multifunction Switch MUX Return circuit from the
Body Control Module connector to the Multifunction Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Multifunction Switch MUX Return circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
505
EXTERIOR LIGHTING
TURN SIGNAL SWITCH INPUT OPEN —
Continued
Symptom:
TURN SIGNAL SWITCH INPUT SHORT
When Monitored and Set Condition:
TURN SIGNAL SWITCH INPUT SHORT
When Monitored:
Ignition on.
Set Condition:
When Input voltage falls below 0.196 volts for 62.5 msec..
POSSIBLE CAUSES
INTERMITTENT CONDITION
MULTIFUNCTION SWITCH
TURN SIGNAL SWITCH MUX CIRCUIT SHORT TO GROUND
TURN SIGNAL SWITCH MUX SHORT TO MUX RETURN CIRCUIT.
MULTIFUNCTION SWITCH MUX RETURN CIRCUIT SHORT TO GROUND
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, clear all BCM DTC’s.
Actuate the Turn Signals on.
With the DRBIII
t, read the DTC information.
Does the DRBIII
t read: Turn Signal Switch Input Short?
All
Yes
→ Go To 2
No
→ The condition that caused the symptom is currently not present.
Inspect the related wiring for a possible intermittent condition.
Look for any chafed, pierced,pinched, or partially broken wires.
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition off.
Disconnect the Multifunction Switch harness connector.
Turn the ignition on.
With the DRBIII
t, read the Multifunction Switch voltage.
Is the voltage above 4.8 volts?
All
Yes
→ Replace the Multifunction Switch.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the Body Control Module harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance between the Turn Signal Switch MUX circuit and ground.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Turn Signal Switch MUX circuit for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
506
EXTERIOR LIGHTING
TEST
ACTION
APPLICABILITY
4
Turn the ignition off.
Disconnect the Body Control Module C5 harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance between the Multifunction Switch MUX Return circuit and
the Turn Signal Switch MUX circuit.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Turn Signal Switch MUX circuit for a short to the
Multifunction Switch MUX Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 5
5
Turn the ignition off.
Disconnect the Body Control Module C5 harness connector.
Disconnect the Multifunction Switch harness connector.
Measure the resistance between the Multifunction Switch MUX Return circuit and
ground.
Is the resistance below 5.0 ohms?
All
Yes
→ Repair the Multifunction Switch MUX Return circuit for a short
to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module.
Perform BODY VERIFICATION TEST - VER 1.
507
EXTERIOR LIGHTING
TURN SIGNAL SWITCH INPUT SHORT —
Continued
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