Chrysler 300/300 Touring/300C, Dodge Magnum. Manual — part 810

B232C-RAIN SENSOR OPTICAL PATH 4 PERFORMANCE

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the ignition on.

•

Set Condition:
Each optical track (received value) is monitored once a second while the rain sensor is active (WK Intermittent
1-5, LX intermittent 1-6) and compared to a small value. The optical track value must be below this value for
4 minutes (checked once per second) before this DTC will be set. Once the DTC is set, the optical track must
be above the threshold for 4 minutes (checked once per second) before the DTC is cleared.

Possible Causes

RAIN SENSING MODULE

Diagnostic Test

REPLACE THE RAIN SENSOR MODULE

NOTE: Check the contact surface of the RSM to the windshield for Delamination (this will resemble air bub-
bles in the contact area). If Delamination is present, replace the windshield in accordance with the service
information.
With the scan tool read RSM DTCs.

Does the scan tool read: B232C-RAIN SENSOR OPTICAL PATH 4 PERFORMANCE?

Yes

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

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

>> Test complete.

8R - 60

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

U0019–CAN B BUS (RSM)

For a complete wiring diagram Refer to Section 8W.

•

When Monitored:
With the ignition on.

•

Set Condition:
If the Can B Bus (+) or B Bus (–) circuit is open, shorted to voltage, or shorted to ground.

Possible Causes

CAN B BUS DTCs IN FRONT CONTROL MODULE

(D55) CAN B BUS (+) CIRCUIT OPEN

(D54) CAN B BUS (–) CIRCUIT OPEN

RAIN SENSOR MODULE

Diagnostic Test

CHECK FOR ACTIVE DTC U0019–CAN B BUS

Turn the ignition on.

With the scan tool, record and erase any Rain Sensor Module DTCs.

Turn the ignition off, wait 30 seconds then turn the ignition on.

With the scan tool, read DTCs.

Is DTC U0019–CAN B BUS active?

Yes

>> Go To 2

>> The condition that caused this code to set is not present at this time. Check for an intermittent condition

by inspecting the related wiring harness for chaffed, pierced, pinched, and partially broken wires. Also
inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated termi-
nals.

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

CHECK FOR ACTIVE CAN B BUS RELATED DTCS IN THE FRONT CONTROL MODULE

With the scan tool, read Front Control Module DTCs

Does the scan tool display any active CAN B BUS related DTCs?

Yes

>> Diagnose and repair the DTC(s). (Refer to 8 - ELECTRICAL/ELECTRONIC CONTROL MODULES/

FRONT CONTROL MODULE - DIAGNOSIS AND TESTING)

>> Go to 3

CHECK (D55) CAN B BUS (+) CIRCUIT FOR AN OPEN

Turn the ignition off.

Disconnect the negative battery cable.

Disconnect the Rain Sensor Module harness connector.

Disconnect the Front Control Module C1 harness connector.

Measure the resistance of the (D55) Can B Bus (+) circuit between the Front Control Module C1 harness connector
and the Rain Sensor Module harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Go To 4

>> Repair the Can B Bus (+) circuit for an open.

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

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

8R - 61

CHECK THE (D54) CAN B BUS (–) CIRCUIT FOR AN OPEN

Measure the resistance of the (D54) Can B Bus (–) circuit between the Front Control Module C1 harness connector
and the Rain Sensor Module harness connector.

Is the resistance below 5.0 ohms?

Yes

>> Replace the Rain Sensor Module in accordance with the service information.

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

>> Repair the Can B Bus (–) circuit for an open.

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

8R - 62

WIPERS/WASHERS - ELECTRICAL DIAGNOSTICS

WIPERS/WASHERS - SERVICE INFORMATION

TABLE OF CONTENTS

page

WIPERS/WASHERS - SERVICE INFORMATION