Chrysler Town, Dodge Caravan. Manual — part 940
Symptom:
REAR WIPER OUTPUT SHORT TO GROUND
When Monitored and Set Condition:
REAR WIPER OUTPUT SHORT TO GROUND
When Monitored:
Ignition ON
Set Condition:
POSSIBLE CAUSES
REAR WIPER MOTOR FUNCTION
INTERMITTENT WIRING AND CONNECTORS
REAR WIPER MOTOR CONTROL CIRCUIT SHORT TO GROUND
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Ignition on, engine not running.
Turn on the Rear Wiper.
Does the Rear Wiper Function?
All
Yes
→ Go To 2
No
→ Go To 3
2
Turn the ignition on.
With the DRBIII
t, erase all BCM and FCM DTCs.
Turn the ignition off.
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
3
Turn the ignition off to the lock position.
Disconnect the Body Control Module harness connector.
Disconnect the Rear Wiper Motor harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance between ground and the Rear Wiper Motor Control circuit.
Is the resistance less than 5.0 ohms?
All
Yes
→ Repair the Rear Wiper Motor Control Circuit for a short to
ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
996
WINDSHIELD WIPER & WASHER
TEST
ACTION
APPLICABILITY
4
Turn the ignition off to the lock position.
Disconnect the Body Control Module harness connector.
Connect a 20A Fused jumper wire between B+ and the Rear Wiper Motor Signal
circuit in the Body Control Module connector harness.
NOTE: An internal short in the Wiper Motor may cause the fuse to open.
Does the Wiper Motor function?
All
Yes
→ Replace the Body Control Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Rear Wiper Motor in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
997
WINDSHIELD WIPER & WASHER
REAR WIPER OUTPUT SHORT TO GROUND —
Continued
Symptom:
REAR WIPER SWITCH MUX INPUT OPEN
When Monitored and Set Condition:
REAR WIPER SWITCH MUX INPUT OPEN
When Monitored:
Ignition ON
Set Condition:
A Sensor voltage is over 4.76 volts for more than .125 seconds.
POSSIBLE CAUSES
INTERMITTENT WIRING AND CONNECTORS
REAR WIPER SWITCH MUX CIRCUIT OPEN
REAR WIPER SWITCH MUX RETURN CIRCUIT OPEN
REAR WIPER SWITCH OPEN
BODY CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRB, select Body, Body Control Module and read the R Wiper Switch Sensor
voltage.
Does the DRB display a Switch voltage greater than 4.5 volts?
All
Yes
→ Go To 2
No
→ Go To 5
2
Turn the ignition off.
Disconnect the Rear Wiper Switch harness connector.
Connect a jumper wire between the Rear Wiper Switch MUX circuit and the Rear
Wiper Switch MUX Return circuit in the Rear Wiper Switch harness connector.
Turn the ignition on.
With the DRB, select Body, Body Controller and read the Rear Wiper SW volts.
Does the DRB R Wiper Switch Sensor voltage read less than 0.3 Volts?
All
Yes
→ Replace the Rear Wiper Switch in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off to the lock position.
Disconnect the Body Control Module harness connector.
Disconnect the Rear Wiper Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Rear Wiper Switch MUX circuit from the Body Control
Module connector to the Rear Wiper Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Rear Wiper Switch MUX circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
998
WINDSHIELD WIPER & WASHER
TEST
ACTION
APPLICABILITY
4
Turn the ignition off to the lock position.
Disconnect the Body Control Module harness connector.
Disconnect the Rear Wiper Switch harness connector.
Note: Check connectors - Clean/repair as necessary.
Measure the resistance of the Rear Wiper Switch MUX Return circuit from the Body
Control Module connector to the Rear Wiper Switch harness connector.
Is the resistance above 5.0 ohms?
All
Yes
→ Repair the Rear Wiper Switch MUX Return circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Body Control Module in accordance with the Service
Information.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition on.
With the DRBIII
t, erase all BCM and FCM DTCs.
Turn the ignition off.
The conditions necessary to set this DTC are not present at this time.
Using the schematics as a guide, inspect the wiring and connectors specific to this
circuit.
Wiggle the wiring while checking for shorts and open circuits.
Were there any problems found?
All
Yes
→ Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
999
WINDSHIELD WIPER & WASHER
REAR WIPER SWITCH MUX INPUT OPEN —
Continued
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