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Dodge Viper SRT-10 (ZB). Manual - part 280

3.9.3

SYSTEM REVISIONS

The 2005 ZB HVAC System remains mostly car-

ryover from 2004.

3.9.4

SYSTEM DIAGNOSTICS

Fault detection is through active and stored Diag-
nostic Trouble Codes (DTCs)

•

DTCs are displayed by the DRBIII

•

Active DTCs are those which currently exist in
the system. The condition causing the fault must
be repaired in order to clear this type of DTC.

•

Stored DTCs are those which occurred in the
system since the A/C-Heater Control Module re-
ceived the last ‘‘clear diagnostic info’’ message.

A/C Performance Testing:

•

The A/C system uses a cycling clutch switch for
freeze protection. Refer to the ZB/SRT-10 Service
Manual for A/C Performance Testing procedures.

The HVAC Door Recalibration function:

•

is actuated with the DRBIII

•

monitors for door span faults.

•

faults display on the DRBIII

t as test messages

only after running the test.

•

faults will not display on the DRBIII

t as Diag-

nostic Trouble Codes.

•

will cause the EBL mode switch status indicator
to flash while the test is running.

If the test fails, the status indicator will continue
to flash until either the test returns passed or the
ignition key is cycled. It will also prevent the A/C
mode switch status indicator from indicating A/C
operating status. However, the A/C mode switch
will continue to function in this state.

The Actuator Circuit Test:

•

is actuated with the DRBIII

•

monitors for shorted actuator circuits.

•

allows service to easily diagnose and troubleshoot
up to three simultaneous shorts.

•

supplements the continuous diagnostics on the
actuator drive system.

•

faults display on the DRBIII

t as test messages

only after running the test.

•

faults will not display on the DRBIII

t as Diag-

nostic Trouble Codes.

When Performing The Actuator Circuit Test

CAUTION: To ensure a proper diagnosis,
repair all Short Too Complex messages first,
all

common

door

driver

circuit

related

messages second, and all other door driver
circuit related messages last.

CAUTION: The DRBIII

can display up to

three Actuator Circuit Test messages at a
time. After repairing each Actuator Circuit
Test message, cycle the ignition switch, then
rerun the Actuator Circuit Test to ensure no
new messages exist.

•

The Short Too Complex message:

indicates that a specific determination of which
lines are shorted could not be made.

is caused by more than three drivers being
shorted in the same direction. For example, four
drivers all shorted to ground, or two or more
drivers shorted with at least one driver shorted
to ignition/battery and one driver shorted to
ground.

•

Messages displaying:

XXX Driver/Circuit Shorted to Ignition/Battery
will set on a per-driver basis.

XXX Driver/Circuit Shorted to Ground will set on
a per-driver basis.

the same two drivers/circuits shorted to ignition/
battery as-well-as shorted to ground indicates
that two actuator driver circuits are shorted
together.

•

When the test returns passed then troubleshoot-
ing should proceed to clearing faults and running
the HVAC Door Recalibration system test as a
final check of system health.

3.10

INSTRUMENT CLUSTER / GAUGE
CLUSTER

The Instrument Cluster houses the Fuel Gauge,

Speedometer with LCD odometer, and the Tachom-
eter. The Gauge Cluster houses the Engine Oil
Pressure Gauge, Engine Oil Temperature Gauge,
Engine Coolant Temperature Gauge, and the Volt-
meter.

The cluster positions all of the analog gauges

using PCI bus messages received from the BCM,
CAB, ACM and the PCM. Warning indicators are
located in the Instrument Cluster and the Gauge
Cluster. Most warning indicators are controlled by
the cluster in response to PCI bus messages. Some
indicators are cluster controlled based on gauge
pointer position. The Instrument Cluster dimming
is controlled via PCI bus messages received from

GENERAL INFORMATION

the BCM. The Gauge Cluster dimming is controlled
using a PWM-hardwire from the Instrument Clus-
ter.

The Instrument Cluster contains the Chime tone

generator. The cluster provides a 5-volt pull-up to
the BCM, which uses a hardwire low-side driver to
control the chime. The cluster monitors the PCI bus
and based on information from various modules,
and cluster internal parameters, will request
chimes from the BCM as well as illuminating the
appropriate warning indicators.

The Instrument Cluster will store DTC’s, commu-

nicate on the PCI bus, display engine information,
and display certain information using the DRBIII

PCI bus information received from the BCM:

•

Odometer Total

•

Fuel Level

•

Door Ajar

•

Dimming Level

•

Door Unlock

•

Deck Ajar

•

Front Fog Lamp

•

Rear Fog Lamp (BUX only)

•

Lighting Parade Mode

•

Ignition Switch Status

•

Park Lamp Status

•

Low Tire Warning

•

High Beam

•

Country Code

PCI bus information received from the ABS module:

•

ABS Lamp Status

•

Brake Fluid Lamp Status

•

Brake Warning Indicator

•

ABS Warning Indicator

PCI bus information received from the PCM:

•

Engine Speed

•

Charging System Volts

•

Charging System Warning (indicator located in
the Volt Gauge)

•

Engine Oil Pressure

•

Engine Oil Temperature

•

Engine Coolant Temperature

•

Skip Shift (Amber indicator located in the Ta-
chometer, this indicator also controlled by gauge
pointer position)

•

MIL Warning Indicator (Service Engine Soon)

•

Vehicle Speed

PCI bus information received from the ACM:

•

Airbag Lamp Status

•

Airbag Warning Indicator

•

Seatbelt Lamp Status

•

Seatbelt Warning Indicator

The Instrument Cluster receives the following in-
formation via hardwire:

•

Brake Fluid Level Low

•

Park Brake

The Gauge Cluster receives the following informa-
tion via hardwire from the ACM:

•

Passenger Airbag Off

Instrument Cluster controlled warning indicators,
based on gauge pointer position:

•

Low Engine Oil Pressure Warning (indicator lo-
cated in the Oil Pressure Gauge)

•

Engine Oil Temperature Warning (indicator lo-
cated in the Oil Temperature Gauge)

•

Engine Coolant Temperature Warning (indicator
located in the Engine Coolant Temperature
Gauge)

•

Skip Shift (Red LED, located in the Tachometer)

•

Low Fuel Warning

GAUGE WARNING INDICATORS

CHARGING SYSTEM WARNING INDICATOR

This indicator is located in the Volt Gauge. The

non- serviceable LED is hardwired to the MIC. The
cluster will illuminate the indicator when the ap-
propriate PCI bus message is received indicating a
Charging System High or Charging System Voltage
Failure has occurred.

The full scale of the Volt Gauge is 10 to 18 volts.

When the cluster receives a bus message indicating
the voltage has reached a Voltage Low condition (10
volts), the cluster will move the gauge pointer to the
appropriate position, illuminate the warning indi-
cator, and request a single chime. When the voltage
reading falls at or above the Voltage Low point, the
cluster will turn OFF the warning indicator.

When the cluster receives a bus message indicat-

ing the voltage at or above the Voltage High point
(16 volts), the cluster will move the pointer to the
appropriate position, illuminate the indicator, and
request a single chime. When the voltage reading
falls at or below the Voltage High point, the cluster
will turn OFF the indicator.

ENGINE COOLANT TEMPERATURE WARNING
INDICATOR

This indicator is located in the Engine Coolant

Temperature Gauge. The non- serviceable LED is
hardwired to the MIC. When the cluster receives a
PCI bus message indicating the coolant tempera-
ture has reached or exceeded the Temperature High

GENERAL INFORMATION

condition, 245°F (118°C), the cluster will illuminate
the warning indicator, request a single chime, and
move the gauge pointer to the appropriate position.
When the temperature reading falls below Temper-
ature High, the cluster will turn OFF the warning
indicator. While the temperature is between the
Temperature High and Temperature Critical levels,
the cluster will maintain the pointer at the Temper-
ature High position.

When the cluster receives a bus message indicat-

ing the coolant temperature has reached or ex-
ceeded the Temperature Critical condition, 260°F
(120°C), the cluster will flash the warning indicator,
request a continuous chime, and move the gauge
pointer to the appropriate position. When the tem-
perature reading falls below the Temperature Crit-
ical point, the cluster will stop flashing the warning
indicator. The indicator remains ON if above the
Temperature High point, or OFF if below. When
descending from a Temperature Critical to a Tem-
perature High condition, no chime will be re-
quested. While the temperature is at or above the
Temperature Critical level, the cluster will main-
tain the pointer at the Temperature Critical pointer
position.

ENGINE OIL PRESSURE WARNING INDICATOR

This indicator is located in the Oil Pressure

gauge. The non- serviceable LED is hardwired to
the MIC. The cluster will illuminate the indicator
when the appropriate PCI bus message is received
indicating the oil pressure has reached a Low
Pressure condition, 10 psi (69 kPa) and engine
speed is greater than 450 RPM. The cluster will
move the gauge pointer to the appropriate position,
illuminate the warning indicator, and request a
single chime. When the cluster receives bus data
indicating oil pressure greater than 10 psi (69 kPa)
at 450 RPM, it will turn OFF the indicator.

ENGINE OIL TEMPERATURE WARNING
INDICATOR

This indicator is located in the Oil Temperature

gauge. The non- serviceable LED is hardwired to
the MIC. When the cluster receives a PCI bus
message indicating the oil temperature has reached
or exceeded the Temperature High condition, 290°F
(144°C), the cluster will illuminate the oil temper-
ature warning indicator, request a single chime,
and move the gauge pointer to the appropriate
position. When the temperature reading falls below
Temperature High, the cluster will turn OFF the
warning indicator. While the temperature is be-
tween the Temperature High and Temperature
Critical levels, the cluster will maintain the pointer
at the Temperature High pointer position.

When the cluster receives a bus message indicat-

ing the oil temperature has reached or exceeded the

Temperature Critical condition, 300°F (160°C), the
cluster will flash the warning indicator, request a
continuous chime, and move the gauge pointer to
the appropriate position. When the temperature
reading falls below the Temperature Critical point,
the cluster will stop flashing the warning indicator.
The indicator remains ON if above the Temperature
High point, or OFF if below. When descending from
a Temperature Critical to a Temperature High
condition, no chime will be requested. While the
temperature is at or above the Temperature Critical
level, the cluster will maintain the pointer at the
Temperature Critical pointer position.

LOW FUEL WARNING INDICATOR

This indicator is located in the Fuel Gauge. The

LED indicator is non- serviceable. The LFW ON
point is at or below the 1/8 tank gauge position. The
LFW OFF point will be above the 1/8 tank position.
The LFW indicator will only be illuminated when
the Fuel Gauge pointer is in between 1/8 position
and ’E’. A chime request will be sent to the BCM via
a PCI Bus message and will coordinate with illumi-
nating of the LFW.

SKIP SHIFT INDICATOR

This indicator is located in the Tachometer. The

Skip Shift indicator is comprised of an Amber LED
and a Red LED that share a common chimney in the
cluster. The LED’s are non- serviceable. The cluster
controls the Skip Shift indicator via 2 inputs: A PCI
Bus message from the PCM and the Tachometer
gauge pointer position. Upon receipt of the appro-
priate PCI message, the cluster will illuminate the
Amber LED when commanded ON, or will turn the
indicator OFF. When the Amber LED (Skip Shift) is
illuminated it is necessary to shift from first to
fourth gear.

When the tachometer pointer indicates 5600

RPM, the cluster will illuminate the Red LED
(Redline). The Red LED will turn OFF when the
tachometer pointer indicates 5500 RPM. The Red
LED will have priority over the Amber LED. If the
Red LED is turned OFF and the Amber LED is still
requested ON, the Amber LED will be illuminated.

The PCM locks out second and third gear and the

cluster will illuminate the Skip Shift Amber LED
when the following conditions are met:

•

Engine

coolant

temperature

exceeds

41°C

(106°F)

•

Vehicle speed is between 12 - 20 MPH (19 - 32
kph)

•

Engine operating above 1322 RPM

•

The PCM verified first gear speed/RPM

•

Throttle position sensor (TPS) signal is less than
0.68 volt above closed throttle (23 percent throt-
tle opening)

GENERAL INFORMATION

The skip shift solenoid resets when vehicle speed

drops below 3 MPH (4 kph).

ILLUMINATION AND DIMMING

The cluster receives dimming information from

the BCM via the PCI bus. The cluster responds by
dimming the backlighting and LCD using an inter-
nally generated PWM signal to the illumination
bulbs. The cluster outputs the same PWM signal to
the Gauge Cluster illumination bulbs. The MIC and
Gauge Cluster illumination bulbs are always
grounded. The 5 (five) MIC, 4 (four) Gauge Cluster,
and the LCD illumination bulbs are serviceable.

SERVICEABLE INDICATORS

The following incandescent bulb indicators are

serviceable:

•

High Beam

•

Service Engine Soon

•

ABS

•

Front Fog

•

Left Turn Signal

•

Right Turn Signal

All LED’s are non- serviceable.

DIAGNOSTIC SELF-TEST

Initiate the Instrument Cluster self test using the

DRBIII

t or the following procedure:

•

Turn the ignition off.

•

Press and hold the Trip Reset button while turn-
ing the ignition on.

•

Release the Trip Reset button as the Self-Test
begins.

•

Cluster Self- Test sequence:

– Illuminate ‘‘Door Ajar’’ and then ‘‘Door Un-

locked’’ in the LCD

– Illuminate all digits and decimal in the LCD

– Display the last 6 digits of the Vehicle Identi-

fication Number (VIN).

– Display Flash version (for example, SOF 1.6)

•

Instrument Cluster gauge pointers sweep simul-
taneously as follows:

– Tachometer Calibration Points

– Speedometer Calibration Points

– Fuel Gauge Calibration Points

•

Gauge Cluster gauge pointers sweep simulta-
neously as follows:

– Engine

Coolant

Temperature

Calibration

Points

– Voltmeter Calibration Points

– Engine Oil Pressure Calibration Points

– Engine Oil Temperature Calibration Points

•

Illuminate Warning Indicators:

– Illuminate all (except Skip Shift, Turn indica-

tors and High Beam) Instrument Cluster and
Gauge Cluster learned and standard indica-
tors (Warning Indicators and LCD warnings)
for approximately 5 seconds.

– Toggle between the Skip shift Amber LED and

the Redline Red LED with a pause in between.

A cluster self-test shall be terminated when the

tachometer is greater than 300 rpm, the ignition
switch is turned off, or the self-test is complete.

3.11

INTERIOR LIGHTING

3.11.1

COURTESY LAMP CONTROL

The body controller has direct control over all of

the vehicle’s courtesy lamps. The body computer
will illuminate the courtesy lamps under any of the
following conditions:

1. Any door ajar and courtesy lamp switch on the

headlamp switch is not in the dome off position.

2. The courtesy lamp switch on the headlamp

switch is in the dome on position.

3. A Remote Keyless Entry unlock message is re-

ceived.

4. Driver door unlocked with key.

3.11.2

ILLUMINATED ENTRY

Illuminated entry is when the doors are closed

and the dome switch is not in DOME and the
Dome/flood lamps are illuminated. This feature
allows the lamps to be illuminated for 30 seconds
and then fade to off. Illuminated entry will be
initiated when the customer enters the vehicle by
unlocking the doors with the key fob, with the key
or with the outside handle. Upon exiting the vehicle
using the inside handle or if the RKE lock button is
pressed, illuminated entry will cancel when the
door closes. If the doors are closed and the ignition
switch is turned on and the start button is pressed,
the illuminated entry will also cancel. The illumi-
nated entry feature will not operate if the courtesy
lamp switch is in the dome off position.

3.11.3

INTERIOR LIGHTING BATTERY
SAVER

If any of the interior lamps are left on after the

ignition is turned off, the BCM will turn them off
after 15 minutes. To return to normal operation, the
courtesy lamps will operate after the dome lamp
switch or door ajar switch changes state.

GENERAL INFORMATION

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