Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 804

Possible Causes

(W17) REAR WIPER PARK SWITCH SENSE CIRCUIT OPEN

FRONT CONTROL MODULE

Diagnostic Test

1.

INTERMITTENT CONDITION

Turn the ignition on.

With the Scan Tool, clear all FCM DTC’s.

Turn the Rear Wipers on.

With the Scan Tool, read the Rear Wiper DTC’s.

Does the Scan Tool read: B230E-REAR WIPER PARK SWITCH INPUT CIRCUIT OPEN?

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 the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)

2.

(W17) REAR WIPER PARK SWITCH SENSE CIRCUIT OPEN

Turn the ignition off.

Disconnect the Rear Wiper Motor connector.

Disconnect the FCM C1 harness connector.

Measure the resistance of the (W17) Rear Wiper Park Switch Sense cir-
cuit.

Is the resistance above 5.0 ohms?

Yes

>> Repair the (W17) Rear Wiper Park Switch Sense circuit for

an open condition.

Perform the BODY VERIFICATION TEST — VER 1.

No

>> Replace the Front Control Module in accordance with the

service information.

Perform the BODY VERIFICATION TEST — VER 1.

8R - 36

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

LX

B231B-REAR WIPER MOTOR CONTROL CIRCUIT LOW

For a complete wiring diagram Refer to Section 8W.

LX

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

8R - 37

Possible Causes

(A1) FUSED B+ CIRCUIT OPEN

REAR WIPER RELAY

FRONT CONTROL MODULE

INTEGRATED POWER MODULE

Diagnostic Test

1.

(A1) FUSED B+ CIRCUIT OPEN

NOTE: Check all fuses and circuit breakers before proceeding with the diagnosis of this DTC.
Turn the ignition on.

Remove the Rear Wiper relay.

Measure the voltage at cavity 86 of the Rear Wiper relay.

Is the voltage above 10.0 volts?

Yes

>> Go To 2

No

>> Check the (A1) Fused B+ circuit for an open.

Perform the BODY VERIFICATION TEST — VER 1. (Refer to 8 - ELECTRICAL/ELECTRONIC CON-
TROL MODULES/FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)

2.

REAR WIPER RELAY

Turn the ignition off.

Replace the Rear Wiper relay with and known good relay.

Turn the ignition on.

With the Scan Tool, clear all FCM DTC’s.

Turn the Rear Wipers ON then OFF.

With the Scan Tool, read the FCM DTC’s.

Does the Scan Tool read: B231B-REAR WIPER MOTOR CON-
TROL CIRCUIT LOW?

Yes

>> Go To 3

No

>> Replace the Rear Wiper relay.

Perform the BODY VERIFICATION TEST — VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

8R - 38

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

LX

3.

INTEGRATED POWER MODULE

Turn the ignition off.

Disconnect the FCM from the IPM.

Turn the ignition on.

Measure the voltage on cavity 28 (Rear Wiper Relay Control) of the
IPM.

Is the voltage above 10.0 volts?

Yes

>> Replace the FCM in accordance with the service informa-

tion.

Perform the BODY VERIFICATION TEST — VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

No

>> Replace the IPM in accordance with the service information.

Perform the BODY VERIFICATION TEST — VER 1. (Refer
to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/
FRONT CONTROL MODULE - DIAGNOSIS AND TEST-
ING)

LX

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

8R - 39