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DIAGNOSTIC – FAILURES AND STATES INTERPRETATION
1. FAILURE OF COMUNICATION CLIP TESTER/ E.C.U. DECODER
RECOMMENDATION Check if the lines K and L are not disturbed by another computer of the vehicle.
Check the fuse state F15 (vehicles up to 01.06.2001) or F07 (vehicles after 01.06.2001).
Replace the fuse if necessary.
Check if the CLIP tester is not the cause of the failure; check if the tester communicates with
another computer of the same vehicle (injection computer).
M easure the tension of the vehicle’s battery (U> 10,5V). If necessary, charge the battery.
Check if the E.C.U. decoder is well connected to the vehicle’s wiring.
Check the right supply of the E.C.U. decoder: - presence of t he ground at pin A8 of the E .C.U. decoder
- supply + I.C. at pin A9 of t he E .C.U. decoder
Be sure that the diagnostic socket i s proper supplied, according to the circuit diagram.
Check the continuity and the isolation of the electric wiring on the corresponding pins layout.
E.C.U. decoder A3 7 diagnostic socket
A4 15
If the connection tester CLIP – E.C.U. decoder can’t be established, then replace the decoder.
{ }
After establishing the communication with the tester, fix the
A FTER REPAIRING possible failures.
Perform a conformity checking.
DIAGNOSTIC
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GENERALITIES
GENERAL PRESENTATION
Fr om the electric point of view, the electric diagrams of the vehicle have been structured as
Applied Principle Schemes (APS), which are presented according to the function each system of
the vehicle is having, from electric point of view. These APS diagrams also contain detail concerning
the internal function of some simple electric components (contacts, relays), thus contributing to a
better understanding of the system functioning and of the incident correct diagnosis.
The list of the functional diagrams is presented in chapter 3, where the vehicle Applied Principle
Schemes may be found. These are divided in: electric supply diagrams, mass connection diagrams
and system functional diagrams.
The electric functional diagrams (APS), are presented in chapter 8 and on these, the following
may be identified:
- electric components, marked by a 3-4 figures; their identification on the electric diagrams
can be achieved by means of “index of components” – Chapter 4; - couplings between the electric wires, marked by the letter R followed by figures; they are
indicated in the Chapter 5 list; - mass connections, marked by the letter M followed by a figure or a letter, are indicated
in Chapter 5. Each wire of the electric diagrams is marked by an alphanumeric code, representing the wire
function, followed by figures representing the wire sectioning .
The connectors and couplings between the wires are presented in chapter 12, where they are
drawn from the wires inlet to the connector/coupling. The wires e ntering each connector socket
are identified by means of the above-mentioned drawings. The Chapter 11 also includes t ables
with details about each wire entering the connector: wire location in the connector socket, wire
sectioning, wire function code and its destination.
Abbreviation index- in chapter 2, the abbreviations used in the tables of chapter 12, are
detailed explained.
Chapter 11 includes the index of wire functions in connectors and couplings, representing the
list of all the connectors and couplings and helping to their easy identification in Chapter 12.
The mass and coupling position on the vehicle is presented in chapter 6 and helps to identify
the electric mass fixing points on it and the location of the couplings between its wires. The electric components position on the vehicle is presented in chapter 7. The position of the
various components with electric func tions on t he vehicle can be identified by means of the
components list. The cockpit fuse box is presented in chapter 9 and contains information about its positioning,
the functional purpose of the fuse and their relays and the description of the wiring connectors
connected to this one.
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The fuse box from the engine compartment is presented in chapter 10, that contains information
about its positioning on the vehicle and the functional purpose of the relays and fuse placed on it.
The functional codes of the wires are detailed explained in chapter 13.
FUNCTIONAL DIAGRAMS INTERPRETATIONS
The functional diagrams i nformation included in Chapter 8 are to be interpreted taking into
consideration the explanation referring to the following example:
1= vehicle class
2= manufacturing year
3= electric functional diagram denomination
4= criteria of equipment differentiatio n for identifying the functional diagram
5= electric connector colour*
6= connector graphical representation
7= electric component index number
8= fuses box number where the relay or the safety fuse are mounted.
9= identification of the safety fuse on the fuses box
10 = safety fuse value
11 = identification of wiring joints
12 = electric mass identification
13 = electric connection colour between wires*
14 = electric connection identification
15 = electric connection graphical representation
16 = symbol (sign) pages containing functional diagrams
17 = wire function code
18 = wire sectioning
19 = functional diagram number
The electric connectors (5) and the couplings (13) are symbolised by the following colours:
BA = white GR = grey RG = red
NO = black MA= brown CY = white
BE = blue VE = green
GENERALITIES
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INTERPRETATION OF CONNECTORS WIRES FUNCTION INDEX
The information concerning the function of the wires in connectors and couplings included in
Chapter 12, are to be interpreted taking into account the explanations based upon the following
example: 1= symbol (sign) of the pages containing connectors and couplings
2= connector destination
3= vehicle class
4= manufacturing year
5= name of the wiring on which the respective connector is placed
6= wire colour
7= connector c ode
8= component to whom the described connector is to be connected
9= connector colour
10 = connector symbol 11 = indication of the connector socket
12 = wire sectioning (mm˝)
13 = wire functional code
14 = wire destination
15 = chapter number and connector drawing number
NOTE
Concerning position 6, pl ease note that one X is marked, for one wire and t wo Xs for two
wi res. The colour of the wire is to be symbolised only in case the electric tra ck of the wire
represents one of the fundamental statuses: + permanent (+IC), + after contact (+DC), mass(-)
or controls. The symbols used for the wire colours are as follows:
A= white AS= blueGR= grey
N= black G = yellowV = green
M= brown VI = violet R = red
GENERALITIES
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ATMOSPHERIC PESSURE SENSOR
Position Sectioning Destination
1 0,5 3DQDETONATION SE NSOR MASS
2 0,5 3S DETONATION INFO INJECTION COMPUTER
ENGINE WIRING B41
01
DETONATION SENSOR
11 12 13 2 5 3 4
6
14
7
8 9
10
88 - 07
15
1
1 2
3DQ 3S
X X
CY2AE M A
146
147 3GN 3F 3D
X X X
A B C
ZW3DT VE
GENERALITIES
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- the connector of the air temperature sensor (pos.14) and of the injectors (pos.14) – push the
locker (A) in the (B) arrow direction then the connector disconnecting may be achieved. The reconnecting of the a.m. connectors sha ll be performed after their correct positioning, followed
by their pushing till a “click” is he ard, that will confirm the firm and correct performing of the connecting.
The connecto r of the oxygen sensor, the coupling connections of the rear wiring to the vehicle
doors wiring, the connections between the doors actuators and the doors wiring are attached to the
car riage body by means of clamps (pos.15). To unlock the clamps maintaining these connectors on the
carriage body, disconnect these connectors, easy push the clamp terminal (I) in the (A) arrow direction
a nd move the connector in the (B) arrow direction, parallel cu the attachment surface on the clamp.
The a ttachment of the connector on the clamp is achieved, proceeding in the reverse order, then
the disconnecting may be performed.
The co nnections between front wiring, das hboard, rear and engine are attached by sliding in the
supports. Next, the disconnecting/reconnecting procedure of the front wiring-dashboard (pos.16) is
presented, which are attached on a support placed under the dashboard, left side:
-r em ove the connection form the support (A), by pulling it in the (B) arrow direction.
-push the (C)- locking spur, then the connections disconnecting may be achieved.
-a t reconnecting, push the two connectors till the correct connecting.
-p osition the connection in the (A) support guides, then push in the (D) arrow directions.
pos . 15
A
B
1
B
DA
C
pos . 16
pos . 14
BA
GENERALITIES
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In the same way, shall be proceed also foe the disconnecting/reconnecting the other previously
mentioned connections.
The disconnecting of the UCE anti-intrusion (pos.17) shall be performed as follows:
- push in the dire ction of the A and B
arrows, the two maintaining clamps of the
wiring connector; - e a sy p ul l t he 24-ways con nector,
achieving in this way the disconnecting; - disconnect then, carefully, the two-ways
connector.
At reconnecting insert the connector until a
“cli ck” i s heard, con fi rm ing t he corre ct
connecting.
The disconnectin g/reconnecting of the UCE decoder (pos.18 ) shall be performed as follows:
- push the t wo clamps (A) and (B) i n the
direction shown by the arrows; - disconnect then the connector;
- at reconnecting push the connector until
a “click” is heard, confirm ing the correct
coupling.
The di sconnecting of the two connectors of the radio uni t (pos.19) shall be performed as
follows:
- push the connectors locking spur in the direction
of the (A) and (B) arrows.
- disconnect the connector;
- at re connecting position the connectors, then
push them until a ”click” is heard, c onfirming the
correct performing of the connection.
AB
pos . 17
A B
pos . 18
B A
pos . 19
GENERALITIES
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COUPLING LIST
R5 3= BATTERY MASS WIRING/MASS STRIPE (J) COUPLING
R89 = FR ONT WIRING/ BRAKE PADS WEAR (K) COUPLING
R 107 = FRONT WIRING/ DASHBOARD (A) COUPLING
R 153 = REAR WIRING/LEFT FRONT DOOR (B) COUPLING
R 154 = REAR WIRING/RIGHT FRONT DOOR (C) COUPLING
R 155 = REAR WIRING/LEFT REAR DOOR(D) COUPLING
R 156 = REAR WIRING/RIGHT REAR DOOR(E) COUPLING]
R 212 = FRONT WIRING/ ENGINE (F) COUPLING
R 265 = FRONT WIRING/REAR (G) COUPLING
R 318 = FRONT WIRING/DASHBOARD(H) COUPLING
MASS LIST
M6 = REAR WI NDOW DEFROSTING MASS
MA = RIGHT FRONT BODY MASS
MB = LEFT FRONT BODY MASS
ME = ELECTRIC MASS AT WINDSCREEN WIPER ATTACHMENT
MH = ENGINE ELECTRIC MASS
ML = LEFT FRONT LONGITUDINAL GIRDER ELECTRIC MASS
MM = ELECTRIC MASS AT THE STEERING COLUMN
MZ = LEFT REAR BODY MASS ( until 01.06.2001)
COU
PLINGS LIST. MASS INDEX
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