Content .. 586 587 588 589 ..

Frelander 2. Manual - part 588

Item

Part Number

Description

Battery

Rain sensor

RH steering column multi-function switch

ATC module

Instrument cluster

Windshield and rear screen washer pump

AJB

Rear screen wiper motor

Windshield wiper motor

Headlamp washer pump

CJB

BJB

PRINCIPLES OF OPERATION

The wiper and washer system can operate in a number of different ways when the vehicle is in power mode 4 through 8.
Requests from the RH steering column multi-function switch are transmitted over the LIN bus to the CJB, which is the main
controller for the system.

Windshield Wiper Slow Wipe

On receiving a request for slow windshield wiper operation the CJB will energize relay 11 in the BJB. When energized, relay
11 provides a feed to the switch contacts of relay 8, which is also located in the CJB. Relay 8 is the fast/slow wipe relay.
When slow wipe has been requested relay 8 remains de-energized, allowing a feed to flow across the relay switch contacts
to the windshield wiper motor slow speed brush contacts.

Windshield Wiper Fast Wipe

On receiving a request for fast windshield wiper operation the CJB will energize relay 11 and relay 8 in the BJB. W hen
energized, relay 11 provides a feed to the switch contacts of relay 8. The energized relay 8 provides a feed to the
windshield wiper motor fast speed brush contacts.

Windshield Wiper Intermittent Wipe

On receiving a request for intermittent windshield wiper operation, the CJB will energize relay 11 in the BJB to operate the
wipers at slow speed. Software contained within the CJB interprets the time delay requested and controls operation of
relay 11 accordingly.

The intermittent wiper setting broadcast on the LIN bus to the CJB equates to the following time delays.

LIN Bus Signal

Time Delay (seconds)

15.5

9.5

3.5

In the event of a LIN bus failure between the CJB and the RH steering column multi-function switch, the CJB will default to
'Limp Home' mode (see below).

Windshield Wiper Automatic Wipe

On receiving a request for automatic windshield wiper operation, the CJB interprets LIN bus messages received from the
rain sensor. The rain sensor provides LIN bus messages with values ranging from 0 to 7. A signal value of 0 is interpreted
by the CJB as there being no water on the windshield.

A signal value from 1 to 5 is interpreted by the CJB as there being a small amount of water hitting the windshield. In this
instance, the CJB initiates a slow wipe routine as detailed in the 'W indshield Wiper Slow Wipe' section above.

A signal value from 6 to 7 is interpreted by the CJB as there being a large amount of water hitting the windshield. In this
instance, the CJB initiates a fast wipe routine as detailed in the 'Windshield W iper Fast Wipe' section above.

Rain sensor sensitivity can be adjusted by turning the rotary control on the RH steering column multi-function switch to
the required position. Six different sensitivity settings are available, which are broadcast over the LIN bus to the CJB.

• NOTE: The CJB will only change a fast wipe routine to a slow wipe routine if the rain sensor value is lower than 4.

Windshield Wiper Flick Wipe

On receiving a request for flick wipe operation the CJB will operate the windshield wipers as described in the 'Slow W ipe'
section above until the request is removed.

Windshield Wiper Park

The windshield wiper park switch is integral with the windshield wiper motor. The park switch ensures the windshield
wipers return to the park position if the windshield wiper request is cancelled mid-stroke.

The CJB is connected to one side of the park switch. The park switch contacts are open when the wipers are in any position
except the park position. While the switch contacts are open, the CJB continues to energize relays 11 and 8 in the BJB,
even if a LIN bus signal has been received from the RH steering column multi-function switch requested the wipers are
stopped.

When the wipers reach the park position, the park switch contacts close and a ground path is created. When the CJB
registers this ground path its software logic determines the wipers are in the park position and de-energizes relays 11 and
8 in the BJB.

Windshield Wiper Limp Home Mode

In the event of a LIN bus failure between the CJB and the RH steering column multi-function switch when the windshield
wipers are active, the CJB will enter limp home mode. In limp home mode, the CJB will only power the windshield wipers
at slow speed.

Windshield Wiper Service Position

The windshield wipers can be parked on the windshield to aid the fitment of new wiper blades. For more information, refer

to the 'Owners Handbook'.

Rear Screen Wiper

On receiving a request for rear screen wiper operation the CJB will energize relay RA2 in the AJB. W hen energized, relay
RA2 provides a feed to the rear screen wiper motor. The rear screen wiper operates intermittently, with a delay between
wipes of approximately 6 seconds. The CJB controls operation of relay RA2, and consequently rear screen wiper motor
operation, accordingly.

The CJB also provides a feed to the rear screen wiper motor park switch. The park switch is integral with the rear screen
wiper motor and ensures the wiper returns to the park position if the rear wiper request is cancelled mid-stroke. The park
switch contacts are closed when the rear wiper is in any position except the park position. This allows the CJB to return
the rear wiper to the park position when relay RA2 is de-energized.

The CJB will also power the rear screen wiper motor if reverse gear is selected while the windshield wiper function is
active. On vehicles fitted with an automatic transmission, the reverse gear signal originates in the Transmission Control
Module (TCM). The TCM broadcasts a reverse gear signal over the high speed CAN bus to the CJB, which responds by
operating the rear wiper.

On vehicles fitted with a manual transmission, the reverse gear signal originates at the reverse gear switch. The reverse
gear switch is hardwired to the CJB.

Windshield Washers

On receiving a request for windshield washer operation the CJB will energize the front washer control relay. This allows a
battery voltage feed to flow to the washer pump. A ground path for the pump is provided by the de-energized rear washer
control relay. Both washer control relays are integral with the CJB.

When windshield washer operation is requested, the windshield washers will operate. The CJB will delay wiper operation
for 100 ms after the washer switch is pressed. If the switch is pressed for less than 100 ms, the CJB will not operate the
wipers.

The CJB will power the windshield wipers for as long as washer operation is requested, although the washers will time out
after 10 seconds. After the washer switch has been released, the CJB will operate the windshield wipers through 2 more
wipe cycles.

Rear Screen Washer

On receiving a request for rear screen washer operation the CJB will energize the rear washer control relay. This allows a
battery voltage feed to flow to the washer pump. A ground path for the pump is provided by the de-energized front washer
control relay. Reversing the polarity of the pump (see 'Windshield Washers' above) allows washer fluid to be directed to
the rear screen washer jet rather than the windshield washer jets. The rear screen washer jet is incorporated into the high
mounted stop lamp.

The rear screen washer will operate for up to 10 seconds if continuously requested. When rear screen washer operation is
requested, the rear screen wiper will operate continuously until the switch is released. After the switch has been released,
or following 10 seconds of continuous operation, the CJB will operate the rear screen wiper through 2 or 3 more wipe
cycles.

Headlamp Washers

When the vehicle enters ignition mode 4 (accessory) to 7 (engine running) the first windshield wash request greater than
100 ms will operate a headlamp power wash sequence. The CJB will then start a 10 minute timer. If 5 requests for
windshield washer operation are made within this 10 minute window, the CJB will power the headlamp washers upon
receiving the fifth request. When this occurs, the 10 minute timer is reset to 0.

If the CJB receives no windshield washer requests during a 10 minute window, the headlamp washers will operate on the
first request received after the 10 minute window has elapsed. Again, once the headlamp washers have been operational,
the CJB resets the timer to 0.

The headlamp washers will only operate when the headlamps are on. The CJB receives a 'lights on' signal from the light
control module over the LIN bus.

When headlamp washer operation is required, the CJB energizes relay 9 in the BJB, allowing a battery voltage feed to
power the headlamp washer pump. A ground path for the washer pump is provided by the de-energized relay 12, which is
also located in the BJB. This sequence of events provides washer fluid to the headlamp 1 washer jets.

After this sequence the power supply to the pump is reversed. The CJB does this by de-energizing relay 9 and energizing
relay 12. This allows the pump to provide washer fluid to the headlamp 2 washer jets. The sequence of events runs as
follows:

Power to headlamp 1 washer - 500 ms
Delay to power headlamp 2 washer - 100 ms
Power to headlamp 2 washer - 500 ms
Delay (soak time) to power 1 headlamp washer - 700 ms
Power to 1 headlamp washer - 500 ms
Delay to power 2 headlamp washer - 100 ms
Power to 2 headlamp washer - 500 ms

If there is less than 1 liter (0.26 US gallon) of washer fluid in the washer fluid reservoir, the CJB will suspend headlamp
washer operation. The fluid level switch is hardwired to the CJB, which also transmits a low fluid signal to the instrument
cluster over the medium speed CAN bus. For additional information, refer to:

Instrument Cluster

(413-01 Instrument Cluster, Description and Operation),

Information and Message Center

(413-08 Information and Message Center, Description and Operation).

Wipers and Washers - Wipers and Washers

Diagnosis and Testing

Principles of Operation

For a detailed description of the wiper and washer systems, refer to the relevant Description and Operation section in the
workshop manual.
REFER to:

W ipers and W ashers

(501-16 Wipers and Washers, Description and Operation).

Inspection and Verification

CAUTION: Diagnosis by substitution from a donor vehicle is NOT acceptable. Substitution of control modules does

not guarantee confirmation of a fault, and may also cause additional faults in the vehicle being tested and/or the donor
vehicle.

1. Verify the customer concern.

2. Visually inspect for obvious signs of mechanical or electrical damage.

Visual Inspection

Mechanical

Electrical

W iper blades
W iper pivot arm shaft
W asher reservoir
Hose(s)
W asher jet(s)

Fuses/relays (refer to electrical guide)
Wiring harness
Correct engagement of electrical connectors
Loose or corroded connections

3. If an obvious cause for an observed or reported concern is found, correct the cause (if possible) before

proceeding to the next step.

4. If the cause is not visually evident, check for Diagnostic Trouble Codes (DTCs) and refer to the DTC Index.

DTC Index

• NOTE: If the control module or a component is suspect and the vehicle remains under manufacturer warranty, refer to the
Warranty Policy and Procedures manual (section B1.2), or determine if any prior approval programme is in operation, prior
to the installation of a new module/component.

• NOTE: Generic scan tools may not read the codes listed, or may read only five digit codes. Match the five digits from the
scan tool to the first five digits of the seven digit code listed to identify the fault (the last two digits give extra
information read by the manufacturer-approved diagnostic system).

• NOTE: When performing voltage or resistance tests, always use a digital multimeter (DMM) accurate to three decimal
places and with a current calibration certificate. W hen testing resistance, always take the resistance of the DMM leads into
account.

• NOTE: Check and rectify basic faults before beginning diagnostic routines involving pinpoint tests.

• NOTE: If DTCs are recorded and, after performing the pinpoint tests, a fault is not present, an intermittent concern may
be the cause. Always check for loose connections and corroded terminals.

DTC

Description

Possible Cause

Action

B109512 W iper On/Off Relay - circuit

short to power

Wiper On/Off relay circuit -
short to power

Refer to electrical circuit diagrams and
check wiper On/Off relay circuit for short to
power

B109514 W iper On/Off Relay - circuit

short to ground or open

Wiper On/Off relay circuit -
short to ground, open circuit

Refer to electrical circuit diagrams and
check wiper On/Off relay circuit for short to
ground, open circuit

B109612 W iper High/Low Relay - circuit

short to power

Wiper High/Low relay circuit -
short to power

Refer to electrical circuit diagrams and
check wiper High/Low relay circuit for short
to power

B109614 W iper High/Low Relay - circuit

short to ground or open

Wiper High/Low relay circuit -
short to ground, open circuit

Refer to electrical circuit diagrams and
check wiper High/Low relay circuit for short
to ground, open circuit

B10AD04 Rain Sensor - System Internal

Failure

Internal sensor failure

Install a new rain sensor.
REFER to:

Rain Sensor

(501-16 W ipers and

Washers, Removal and Installation).

B10AD09 Rain Sensor - Component

Failures

Rain sensor incorrectly
installed
Rain sensor internal failure

Check for correct installation of rain
sensor. Install a new sensor as required.
REFER to:

Rain Sensor

(501-16 W ipers and

Washers, Removal and Installation).

B113188 W iper Motor Module - Bus off

Lost communications with
wiper motor module

Carry out diagnostic strategy associated
with this DTC using manufacturer approved
diagnostic system

B1C8212 Headlamp Washer Relay Coil

Circuit - circuit short to power

Headlamp washer relay control
circuit - short to power

Refer to electrical circuit diagrams and
check headlamp washer relay control circuit
for short to power

Content .. 586 587 588 589 ..