Dodge Viper SRT-10 (ZB). Manual — part 271

(11) Remove the bolt that secures the front section

of the suction line to the accumulator outlet port
(Fig. 25).

(12) Disconnect the suction line from the accumu-

lator and remove and discard the O-ring seal.

(13) Install plugs in, or tape over the opened suc-

tion line fitting and the accumulator port.

(14) Remove the front section of the suction line

from the engine compartment.

REAR SECTION

(1) Recover the refrigerant from the refrigerant

system (Refer to 24 - HEATING & AIR CONDITION-
ING/PLUMBING

-

STANDARD

PROCEDURE

-

REFRIGERANT SYSTEM RECOVERY).

(2) Disconnect and isolate the negative battery

cable.

(3) Loosen the nut that secures the suction line to

the evaporator (Fig. 26).

(4) Disconnect the suction line from the evaporator

and remove and discard the O-ring seal.

(5) Install plugs in, or tape over the opened suc-

tion line fitting and the evaporator outlet tube.

(6) Raise and support the vehicle.
(7) Remove the right front wheel (Refer to 22 -

TIRES/WHEELS - REMOVAL).

(8) Remove the right inner fender splash shield

(Refer to 23 - BODY/EXTERIOR/FRONT WHEEL-
HOUSE SPLASH SHIELD - REMOVAL).

(9) Remove the bolt that secures the rear section

of the suction line to the accumulator (Fig. 25).

(10) Disconnect the suction line from the accumu-

lator and remove and discard the O-ring seal.

(11) Install plugs in, or tape over the opened suc-

tion line fitting and the accumulator port.

(12) Remove the rear section of the suction line

from the engine compartment.

INSTALLATION

NOTE: The A/C suction line is serviced in two sec-
tions. The front section connects between the accu-
mulator and the A/C compressor. The rear section
connects between the evaporator and the accumu-
lator and includes the low side service port.

FRONT SECTION

(1) Position the front section of the suction line

into the engine compartment.

(2) Remove the tape or plugs from the suction line

fitting and the accumulator port.

(3) Lubricate a new rubber O-ring seal with clean

refrigerant oil and install it on the suction line fit-
ting. Use only the specified O-ring as it is made of a
special material for the R-134a system. Use only

Fig. 25 Suction Line - Accumulator

1 - NUT (2)
2 - ACCUMULATOR
3 - A/C LOW PRESSURE SWITCH
4 - SUCTION LINE
5 - BOLT
6 - SUCTION LINE FITTING

Fig. 26 Suction Line - Evaporator

1 - SUCTION LINE (REAR)
2 - SUCTION LINE (FRONT)
3 - A/C EVAPORATOR TUBES
4 - LIQUID LINE

24 - 58

PLUMBING

ZB

SUCTION LINE (Continued)

refrigerant oil of the type recommended for the A/C
compressor in the vehicle.

(4) Connect the front section of the suction line to

the accumulator.

(5) Install the bolt that secures the suction line to

the accumulator. Tighten the bolt to 18 N·m (13 ft.
lbs.).

(6) Install the right inner fender splash shield

(Refer to 23 - BODY/EXTERIOR/FRONT WHEEL-
HOUSE SPLASH SHIELD - INSTALLATION).

(7) Install the right front wheel (Refer to 22 -

TIRES/WHEELS - INSTALLATION).

(8) Install the bolts that secure the two suction

line brackets to the front of the engine. Tighten the
bolts securely.

(9) Lower the vehicle.
(10) Remove the tape or plugs from the suction

line fitting and the compressor port.

(11) Lubricate a new rubber O-ring seal with clean

refrigerant oil and install it on the suction line fit-
ting. Use only the specified O-ring as it is made of a
special material for the R-134a system. Use only
refrigerant oil of the type recommended for the A/C
compressor in the vehicle.

(12) Connect the suction line to the A/C compres-

sor.

(13) Install the bolt that secures the suction line to

the A/C compressor. Tighten the bolt 25 N·m (18 ft.
lbs.).

(14) Reconnect the negative battery cable.
(15) Evacuate the refrigerant system (Refer to 24 -

HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM EVACUATE).

(16) Charge the refrigerant system (Refer to 24 -

HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM CHARGE).

REAR SECTION

(1) Position the rear section of the suction line into

the engine compartment.

(2) Remove the tape or plugs from the suction line

fitting and the accumulator port.

(3) Lubricate a new rubber O-ring seal with clean

refrigerant oil and install it on the suction line fit-
ting. Use only the specified O-ring as it is made of a
special material for the R-134a system. Use only
refrigerant oil of the type recommended for the A/C
compressor in the vehicle.

(4) Connect the rear section of the suction line to

the accumulator.

(5) Install the bolt that secures the suction line to

the accumulator. Tighten the bolt to 18 N·m (13 ft.
lbs.).

(6) Install the right inner fender splash shield

(Refer to 23 - BODY/EXTERIOR/FRONT WHEEL-
HOUSE SPLASH SHIELD - INSTALLATION).

(7) Install the right front wheel (Refer to 22 -

TIRES/WHEELS - INSTALLATION).

(8) Lower the vehicle.
(9) Remove the tape or plugs from the suction line

fitting and the evaporator tube.

(10) Lubricate a new rubber O-ring seal with clean

refrigerant oil and install it on the suction line fit-
ting. Use only the specified O-ring as it is made of a
special material for the R-134a system. Use only
refrigerant oil of the type recommended for the A/C
compressor in the vehicle.

(11) Connect the suction line to the A/C evapora-

tor.

(12) Tighten the nut that secures the suction line

to the A/C evaporator. Tighten the nut to 13.5 N·m
(10 ft. lbs.).

(13) Reconnect the negative battery cable.
(14) Evacuate the refrigerant system (Refer to 24 -

HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM EVACUATE).

(15) Charge the refrigerant system (Refer to 24 -

HEATING & AIR CONDITIONING/PLUMBING -
STANDARD PROCEDURE - REFRIGERANT SYS-
TEM CHARGE).

ZB

PLUMBING

24 - 59

SUCTION LINE (Continued)

EMISSIONS CONTROL

TABLE OF CONTENTS

page

page

EMISSIONS CONTROL

DESCRIPTION

DESCRIPTION - MONITORED COMPONENT

. 1

DESCRIPTION - VEHICLE EMISSION

CONTROL INFORMATION LABEL . . . . . . . . . . 4

DESCRIPTION - TRIP DEFINITION

. . . . . . . . . 5

OPERATION - NON-MONITORED CIRCUITS

. . 5

DESCRIPTION - MONITORED SYSTEMS

. . . . 6

DESCRIPTION - HIGH AND LOW LIMITS

. . . . 8

OPERATION

OPERATION - SYSTEM

. . . . . . . . . . . . . . . . . . 8

DRB III

T

STATE DISPLAY TEST MODE

. . . . . . 9

EVAPORATIVE EMISSIONS

. . . . . . . . . . . . . . . . 10

ON-BOARD DIAGNOSTICS

. . . . . . . . . . . . . . . . 18

EMISSIONS CONTROL

DESCRIPTION

DESCRIPTION - MONITORED COMPONENT

There are several components that will affect vehi-

cle emissions if they malfunction If one of these com-
ponents

malfunctions

the

Malfunction

Indicator

Lamp (Check Engine) will illuminate.

Some of the component monitors are checking for

proper operation of the part. Previously, a component
like the Throttle Position sensor (TPS) was checked
by the PCM for an open or shorted circuit. If one of
these conditions occurred, a DTC was set. Now there
is a check to ensure that the component is working.
Electrically operated components now have input
(rationality) and output (functionality) checks.

Any component that has an associated limp in will

set a fault after 1 trip with the malfunction present.

Refer to the Diagnostic Trouble Codes Description

Charts and the appropriate Powertrain Diagnostic
Procedure Manual for diagnostic procedures.

The following is a list of the monitored compo-

nents:

• Comprehensive Components

• Oxygen Sensor Monitor

• Oxygen Sensor Heater Monitor

• Catalyst Monitor

COMPREHENSIVE COMPONENTS

Along with the major monitors, OBD II requires

that the diagnostic system monitor any component
that could affect emissions levels. In many cases,
these components were being tested under OBD I.
The OBD I requirements focused mainly on testing
emissions-related components for electrical opens and
shorts.

However, OBD II also requires that inputs from

powertrain components to the PCM be tested for

rationality, and that outputs to powertrain compo-
nents from the PCM be tested for functionality.
Methods for monitoring the various Comprehensive
Component monitoring include:

(1) Circuit Continuity
• Open

• Shorted high

• Shorted to ground
(2) Rationality or Proper Functioning
• Inputs tested for rationality

• Outputs tested for functionality

NOTE: Comprehensive component monitors are
continuous. Therefore, enabling conditions do not
apply.

Input Rationality—While input signals to the

PCM are constantly being monitored for electrical
opens and shorts, they are also tested for rationality.
This means that the input signal is compared against
other inputs and information to see if it makes sense
under the current conditions.

PCM sensor inputs that are checked for rationality

include:

• Manifold Absolute Pressure (MAP) Sensor

• Oxygen Sensor (O2S)

• Engine Coolant Temperature (ECT) Sensor

• Camshaft Position (CMP) Sensor

• Vehicle Speed Sensor

• Crankshaft Position (CKP) Sensor

• Intake/inlet Air Temperature (IAT) Sensor

• Throttle Position (TPS) Sensor

• Ambient/Battery Temperature Sensors

• Oxygen Sensor Heater

• Leak Detection Pump Switch
Output Functionality—PCM outputs are tested

for functionality in addition to testing for opens and
shorts. When the PCM provides a voltage to an out-
put component, it can verify that the command was
carried out by monitoring specific input signals for
expected changes. For example, when the PCM com-

ZB

EMISSIONS CONTROL

25 - 1