NISSAN TEANA 2008 Service Manual

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AV-207
< FUNCTION DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
MB A
O
P
Error item
Some error items may be displayed simultaneously according to the cause. If some error items are displayed
simultaneously, the detection of the cause can be performed by the combination of display items
JSNIA0151GB
Error item Description Possible malfunction factor/Action to take
CAN COMM CIRCUITCAN communication malfunction is detect-
ed.Perform diagnosis with CONSULT-III, and
then repair the malfunctioning parts accord-
ing to the diagnosis results.
CONTROL UNIT (CAN)CAN initial diagnosis malfunction is detect-
ed.
Replace the AV control unit. CONTROL UNIT (AV)AV communication circuit initial diagnosis
malfunction is detected.
FLASH-ROM Error Of Control Unit
AV control unit malfunction is detected.
CAN Controller Memory Error
Amplifier Temperature Error BOSE amp. malfunction is detected. Replace the BOSE amp.
Front Display Connection ErrorWhen either one of the following items is
detected:
 display unit power supply and ground cir-
cuits are malfunctioning.
 serial communication circuits between
display unit and AV control unit are mal-
functioning.
 serial communication signal between
display unit and AV control unit is mal-
functioning. Display unit power supply and ground
circuits.
 Serial communication circuits between
display unit and AV control unit.
Camera Cont. Unit Connection ErrorA malfunction is detected in camera con-
nection recognition signal circuit.Camera connection recognition signal cir-
cuit.
Center speaker OUT: openSound signal center speaker circuit is
open.Check sound signal center speaker circuit.
Center speaker OUT: shortSound signal center speaker circuit is
shorted between center speaker signal (+)
and center speaker signal (-).Check sound signal center speaker circuit.
Center speaker OUT: short to groundSound signal center speaker circuit to
ground is shorted.Check sound signal center speaker circuit.
Center speaker OUT: short to batterySound signal center speaker circuit to bat-
tery is shorted.Check sound signal center speaker circuit.
FR speaker OUT: openSound signal front speaker RH circuit is
open.Check sound signal front speaker RH cir-
cuit.

AV-208
< FUNCTION DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
FR speaker OUT: shortSound signal front speaker RH circuit is
shorted between front speaker RH signal
(+) and front speaker RH signal (-).Check sound signal front speaker RH cir-
cuit.
FR speaker OUT: short to groundSound signal front speaker RH circuit to
ground is shorted.Check sound signal front speaker RH cir-
cuit.
FR speaker OUT: short to batterySound signal front speaker RH circuit to
battery is shorted.Check sound signal front speaker RH cir-
cuit.
RR speaker OUT: openSound signal rear speaker RH circuit is
open.Check sound signal rear speaker RH cir-
cuit.
RR speaker OUT: shortSound signal rear speaker RH circuit is
shorted between rear speaker LH signal (+)
and rear speaker LH signal (-).Check sound signal rear speaker RH cir-
cuit.
RR speaker OUT: short to groundSound signal rear speaker RH circuit to
ground is shorted.Check sound signal rear speaker RH cir-
cuit.
RR speaker OUT: short to batterySound signal rear speaker RH circuit to bat-
tery is shorted.Check sound signal rear speaker RH cir-
cuit.
RR Woofer OUT: open Sound signal woofer RH circuit is open. Check sound signal woofer RH circuit.
RR Woofer OUT: shortSound signal woofer RH circuit is shorted
between woofer RH signal (+) and woofer
RH signal (-).Check sound signal woofer RH circuit.
RR Woofer OUT: short to groundSound signal woofer RH circuit to ground is
shorted.Check sound signal woofer RH circuit.
RR Woofer OUT: short to batterySound signal woofer RH circuit to battery is
shorted.Check sound signal woofer RH circuit.
RL Woofer OUT: open Sound signal woofer LH circuit is open. Check sound signal woofer LH circuit.
RL Woofer OUT: shortSound signal woofer LH circuit is shorted
between woofer LH signal (+) and woofer
LH signal (-).Check sound signal woofer LH circuit.
RL Woofer OUT: short to groundSound signal woofer LH circuit to ground is
shorted.Check sound signal woofer LH circuit.
RL Woofer OUT: short to batterySound signal woofer LH circuit to battery is
shorted.Check sound signal woofer LH circuit.
RL speaker OUT: openSound signal rear speaker LH circuit is
open.Check sound signal rear speaker LH circuit.
RL speaker OUT: shortSound signal rear speaker LH circuit is
shorted between rear speaker LH signal (+)
and rear speaker LH signal (-).Check sound signal rear speaker LH circuit.
RL speaker OUT: short to groundSound signal rear speaker LH circuit to
ground is shorted.Check sound signal rear speaker LH circuit.
RL speaker OUT: short to batterySound signal rear speaker LH circuit to bat-
tery is shorted.Check sound signal rear speaker LH circuit.
FL speaker OUT: openSound signal front speaker LH circuit is
open.Check sound signal front speaker LH cir-
cuit.
FL speaker OUT: shortSound signal front speaker LH circuit is
shorted between front speaker LH signal
(+) and front speaker LH signal (-).Check sound signal front speaker LH cir-
cuit.
FL speaker OUT: short to groundSound signal front speaker LH circuit to
ground is shorted.Check sound signal front speaker LH cir-
cuit.
FL speaker OUT: short to batterySound signal front speaker LH circuit to
battery is shorted.Check sound signal front speaker LH cir-
cuit.
FL tweeter OUT: openSound signal front squawker LH circuit is
open.Check sound signal front squawker LH cir-
cuit. Error item Description Possible malfunction factor/Action to take

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AV-209
< FUNCTION DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
MB A
O
P
FL tweeter OUT: shortSound signal front squawker LH circuit is
shorted between front squawker LH signal
(+) and front squawker LH signal (-).Check sound signal front squawker LH cir-
cuit.
FL tweeter OUT: short to groundSound signal front squawker LH circuit to
ground is shorted.Check sound signal front squawker LH cir-
cuit.
FL tweeter OUT: short to batterySound signal front squawker LH circuit to
battery is shorted.Check sound signal front squawker LH cir-
cuit.
FR tweeter OUT: openSound signal front squawker RH circuit is
open.Check sound signal front squawker RH cir-
cuit.
FR tweeter OUT: shortSound signal front squawker RH circuit is
shorted between front squawker RH signal
(+) and front squawker RH signal (-).Check sound signal front squawker RH cir-
cuit.
FR tweeter OUT: short to groundSound signal front squawker RH circuit to
ground is shorted.Check sound signal front squawker RH cir-
cuit.
FR tweeter OUT: short to batterySound signal front squawker RH circuit to
battery is shorted.Check sound signal front squawker RH cir-
cuit.
AV COMM CIRCUITRear control switch power supply and
ground circuits malfunction are detected.Rear control switch power supply and
ground circuits.
 AV COMM CIRCUIT
 Switches Connection ErrorWhen either one of the following items is
detected:
 multifunction switch power supply and
ground circuits are malfunctioning.
 AV communication circuits between AV
control unit and multifunction switch are
malfunctioning.
 AV communication signal between AV
control unit and multifunction switch is
malfunctioning. Multifunction switch power supply and
ground circuits.
 AV communication circuits between AV
control unit and multifunction switch.
 AV COMM CIRCUIT
 Amplifier Connection ErrorWhen either one of the following items is
detected:
 BOSE amp. power supply and ground
circuits are malfunctioning.
 AV communication signal between AV
control unit and BOSE amp. is malfunc-
tionning.BOSE amp. power supply and ground cir-
cuits.
 AV COMM CIRCUIT
 DVD Deck Connection ErrorWhen either one of the following items is
detected:
 DVD player power supply and ground cir-
cuits are malfunctioning.
 AV communication circuits between
BOSE amp. and DVD player are mal-
functioning.
 AV communication signal between AV
control unit and DVD player is malfunc-
tioning. DVD player power supply and ground cir-
cuits.
 AV communication circuits between
BOSE amp. and DVD player.
 AV COMM CIRCUIT
 DVD Deck Connection Error
 Amplifier Connection ErrorWhen either one of the following items is
detected:
 AV communication circuits between cam-
era control unit and BOSE amp. are mal-
functioning.
 AV communication signal between AV
control unit and BOSE amp. is malfunc-
tioning.AV communication circuits between cam-
era control unit and BOSE amp. Error item Description Possible malfunction factor/Action to take

AV-210
< FUNCTION DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
Vehicle CAN Diagnosis
 CAN communication status and error counter is displayed.
 The error counter displays "OK" if any malfunction was not
detected in the past and displays "0" if a malfunction is detected. It
increases by 1 if the condition is normal at the next ignition switch
ON cycle. The upper limit of the counter is 39.
 The error counter is erased if reset.
AV COMM Diagnosis
 Displays the communication status between AV control unit (mas-
ter unit) and each unit.
 The error counter displays "OK" if any malfunction was not
detected in the past and displays "0" if a malfunction is detected. It
increases by 1 if the condition is normal at the next ignition switch
ON cycle. The upper limit of the counter is 39.
 If it resets, the error counter is erased.
 AV COMM CIRCUIT
 DVD Deck Connection Error
 Amplifier Connection Error
 Rear view Camera connection ErrorWith rear control switch
When either one of the following items is
detected:
 malfunction is detected in AV communi-
cation circuits between rear control
switch and camera control unit.
 malfunction is detected in AV communi-
cation circuits between camera control
unit and NAVI control unit.  AV communication circuits between mul-
tifunction switch and rear control switch.
 AV communication circuits between rear
control switch and camera control unit.
Without rear control switch
When either one of the following items is
detected:
 malfunction is detected in AV communi-
cation circuits between multifunction
switch and camera control unit.
 malfunction is detected in AV communi-
cation circuits between camera control
unit and NAVI control unit.AV communication circuits between multi-
function switch and camera control unit.
 AV COMM CIRCUIT
 Switches Connection Error
 DVD Deck Connection Error
 Amplifier Connection Error
 Rear view Camera connection ErrorWhen either one of the following items is
detected:
 AV communication circuits between AV
control unit and multifunction switch are
malfunctioning.
 AV communication signal between AV
control unit and multifunction switch is
malfunctioning.AV communication circuits between AV
control unit and multifunction switch. Error item Description Possible malfunction factor/Action to take
Items Display (Current)Malfunction counter
(Past)
Tx (HVAC) OK / UNKWN OK / 0 – 39
Rx (ECM) OK / UNKWN OK / 0 – 39
Rx (Cluster) OK / UNKWN OK / 0 – 39
Rx (BCM) OK / UNKWN OK / 0 – 39
Rx (HVAC) OK / UNKWN OK / 0 – 39
Rx (USM) OK / UNKWN OK / 0 – 39
JSNIA1287GB
ItemsStatus
(Current)Counter
(Past)
C Tx(ITM–SW) OK / UNKWN OK / 0 – 39
C Rx(PrimarySW–ITM) OK / UNKWN OK / 0 – 39
JSNIA1288GB

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AV-211
< FUNCTION DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
MB A
O
P Delete Unit Connection Log
Deletes any unit connection records and error records from the AV
control unit memory. (Clear the records of the unit that has been
removed)
CONSULT-III Function (MULTI AV)INFOID:0000000003765658
CONSULT-III FUNCTIONS
CONSULT-III performs the following functions via the communication with the AV control unit.
AV COMMUNICATION
When “AV communication” of “CAN Diag Support Monitor” is selected, the following function will be performed.
SELF-DIAGNOSIS RESULTS
 In CONSULT-III self-diagnosis, self-diagnosis results and error history are displayed collectively.
 The timing is displayed as “0” if any of the error codes [U1000], [U1010], [U1300] and [U1310] is detected.
The counter increases by 1 if the condition is normal at the next ignition switch ON cycle.
Self-diagnosis Results Display Item
C Rx(RrSeatSW–ITM) OK / UNKWN OK / 0 – 39
C Rx(Amp–ITM) OK / UNKWN OK / 0 – 39
C Rx(RearCamera–ITM) OK / UNKWN OK / 0 – 39
C Rx(DVD–ITM) OK / UNKWN OK / 0 – 39
C Rx(AmpAudio–ITM) OK / UNKWN OK / 0 – 39
C Rx(DVDAudio–ITM) OK / UNKWN OK / 0 – 39ItemsStatu s
(Current)Counter
(Past)
JSNIA0154GB
Diagnosis mode Description
Ecu Identification The part number of AV control unit can be checked.
Self Diagnostic ResultPerforms a diagnosis on the AV control unit and a connection diagnosis for the communication
circuit of the Multi AV system, and displays the current and past malfunctions collectively.
Data Monitor The diagnosis of vehicle signal that is input to the AV control unit can be performed.
AV communicationAV&NAVI C/UDisplays the communication status from AV control unit to each unit as well as the error
counter.
AUDIO Displays the AV control unit communication status and the error counter.
Error item Detection logic Possible malfunction factor/Action to take
CAN COMM CIRCUIT [U1000]CAN communication malfunction is detect-
ed.Refer to AV- 2 1 6 , "
DiagnosisProcedure".
CONTROL UNIT (CAN) [U1010]CAN initial diagnosis malfunction is detect-
ed.
Replace the AV control unit.
Refer toAV- 3 7 8 , "
Removal and Installation"
AV- 3 7 8 , "
Removal and Installation". CONTROL UNIT (AV) [U1310]AV communication circuit initial diagnosis
malfunction is detected.
Control Unit FLASH-ROM [U1200]
AV control unit malfunction is detected.
CAN CONT [U1216]

AV-212
< FUNCTION DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AMP TEMP [U1231] BOSE amp. is detected.Replace the BOSE amp.
Refer to AV- 3 8 6 , "Removal and Installa-
tion".
FRONT DISP CONN [U1243]When either one of the following items is
detected:
 display unit power supply and ground cir-
cuits are malfunctioning.
 serial communication circuits between
display unit and AV control unit are mal-
functioning.
 serial communication signal between
display unit and AV control unit is mal-
functioning. Display unit power supply and ground
circuits
Refer to AV- 2 2 2 , "
Diagnosis Procedure".
 Serial communication circuits between
display unit and AV control unit
CAMERA CONT. CONN [U1250]Camera connection recognition signal cir-
cuit malfunction is detected.Camera connection recognition signal cir-
cuit
Refer to AV- 2 2 4 , "
Diagnosis Procedure".
CENTER SP OPEN [U1260]Sound signal center speaker circuit is
open.Check sound signal center speaker circuit.
CENTER SP SHORT [U1261]Sound signal center speaker circuit is
shorted between center speaker signal (+)
and center speaker signal (-).Check sound signal center speaker circuit.
CENTER SP GND-SHORT [U1262]Sound signal center speaker circuit to
ground is shorted.Check sound signal center speaker circuit.
CENTER SP VB-SHORT [U1263]Sound signal center speaker circuit to bat-
tery is shorted.Check sound signal center speaker circuit.
FR-DOOR SP OPEN [U1264]Sound signal front speaker RH circuit is
open.Check sound signal front speaker RH cir-
cuit.
FR-DOOR SP SHORT [U1265]Sound signal front speaker RH circuit is
shorted between front speaker RH signal
(+) and front speaker RH signal (-).Check sound signal front speaker RH cir-
cuit.
FR-DOOR SP GND-SHORT [U1266]Sound signal front speaker RH circuit to
ground is shorted.Check sound signal front speaker RH cir-
cuit.
FR-DOOR SP VB-SHORT [U1267]Sound signal front speaker RH circuit to
battery is shorted.Check sound signal front speaker RH cir-
cuit.
RR-SP/FR-WOOFER OPEN [U1268]Sound signal rear speaker RH circuit is
open.Check sound signal rear speaker RH cir-
cuit.
RR-SP/FR-WOOFER SHORT [U1269]Sound signal rear speaker RH circuit is
shorted between rear speaker LH signal (+)
and rear speaker LH signal (-).Check sound signal rear speaker RH cir-
cuit.
RR-SP/FR-WOOFER GND-SHORT
[U126A]Sound signal rear speaker RH circuit to
ground is shorted.Check sound signal rear speaker RH cir-
cuit.
RR-SP/FR-WOOFER VB-SHORT [U126B]Sound signal rear speaker RH circuit to bat-
tery is shorted.Check sound signal rear speaker RH cir-
cuit.
RR-SURROUND SP OPEN [U126C] Sound signal woofer RH circuit is open. Check sound signal woofer RH circuit.
RR-SURROUND SP SHORT [U126D]Sound signal woofer RH circuit is shorted
between woofer RH signal (+) and woofer
RH signal (-).Check sound signal woofer RH circuit.
RR-SURROUND SP GND-SHORT
[U126E]Sound signal woofer RH circuit to ground is
shorted.Check sound signal woofer RH circuit.
RR-SURROUND SP VB-SHORT [U126F]Sound signal woofer RH circuit to battery is
shorted.Check sound signal woofer RH circuit.
RL-SURROUND SP OPEN [U1274] Sound signal woofer LH circuit is open. Check sound signal woofer LH circuit.
RL-SURROUND SP SHORT [U1275]Sound signal woofer LH circuit is shorted
between woofer LH signal (+) and woofer
LH signal (-).Check sound signal woofer LH circuit. Error item Detection logic Possible malfunction factor/Action to take

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AV-213
< FUNCTION DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
MB A
O
P
RL-SURROUND SP GND-SHORT [U1276]Sound signal woofer LH circuit to ground is
shorted.Check sound signal woofer LH circuit.
RL-SURROUND SP VB-SHORT [U1277]Sound signal woofer LH circuit to battery is
shorted.Check sound signal woofer LH circuit.
RL-SP/FL-WOOFER OPEN [U1278]Sound signal rear speaker LH circuit is
open.Check sound signal rear speaker LH circuit.
RL-SP/FL-WOOFER SHORT [U1279]Sound signal rear speaker LH circuit is
shorted between rear speaker LH signal (+)
and rear speaker LH signal (-).Check sound signal rear speaker LH circuit.
RL-SP/FL-WOOFER GND-SHORT
[U127A]Sound signal rear speaker LH circuit to
ground is shorted.Check sound signal rear speaker LH circuit.
RL-SP/FL-WOOFER VB-SHORT [U127B]Sound signal rear speaker LH circuit to bat-
tery is shorted.Check sound signal rear speaker LH circuit.
FL-DOOR SP OPEN [U127C]Sound signal front speaker LH circuit is
open.Check sound signal front speaker LH cir-
cuit.
FL-DOOR SP SHORT [U127D]Sound signal front speaker LH circuit is
shorted between front speaker LH signal
(+) and front speaker LH signal (-).Check sound signal front speaker LH cir-
cuit.
FL-DOOR SP GND-SHORT [U127E]Sound signal front speaker LH circuit to
ground is shorted.Check sound signal front speaker LH cir-
cuit.
FL-DOOR SP VB-SHORT [U127F]Sound signal front speaker LH circuit to
battery is shorted.Check sound signal front speaker LH cir-
cuit.
FR-TWEETER OPEN [U1294]Sound signal front squawker RH circuit is
open.Check sound signal front squawker RH cir-
cuit.
FR-TWEETER SHORT [U1295]Sound signal front squawker RH circuit is
shorted between front squawker RH signal
(+) and front squawker RH signal (-).Check sound signal front squawker RH cir-
cuit.
FR-TWEETER GND-SHORT [U1296]Sound signal front squawker RH circuit to
ground is shorted.Check sound signal front squawker RH cir-
cuit.
FR-TWEETER VB-SHORT [U1297]Sound signal front squawker RH circuit to
battery is shorted.Check sound signal front squawker RH cir-
cuit.
FL-TWEETER OPEN [U1298]Sound signal front squawker LH circuit is
open.Check sound signal front squawker LH cir-
cuit.
FL-TWEETER SHORT [U1299]Sound signal front squawker LH circuit is
shorted between front squawker LH signal
(+) and front squawker LH signal (-).Check sound signal front squawker LH cir-
cuit.
FL-TWEETER GND-SHORT [U129A]Sound signal front squawker LH circuit to
ground is shorted.Check sound signal front squawker LH cir-
cuit.
FL-TWEETER VB-SHORT [U129B]Sound signal front squawker LH circuit to
battery is shorted.Check sound signal front squawker LH cir-
cuit.
 AV COMM CIRCUIT [U1300]
 SWITCH CONN [U1240]When either one of the following items is
detected:
 Multifunction switch power supply and
ground circuits are malfunctioning.
 AV communication circuits between AV
control unit and multifunction switch are
malfunctioning.
 AV communication signal between AV
control unit and multifunction switch is
malfunctioning. Multifunction switch power supply and
ground circuits
refer to AV- 2 3 7 , "MULTIFUNCTION
SWITCH : Diagnosis Procedure".
 AV communication circuits between AV
control unit and multifunction switch Error item Detection logic Possible malfunction factor/Action to take

AV-214
< FUNCTION DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
DATA MONITOR
ALL SIGNALS
 Displays the status of the following vehicle signals inputted to the AV control unit.
 AV COMM CIRCUIT [U1300]
 AMP CONN [U124E]When either one of the following items is
detected:
 BOSE amp. power supply and ground
circuits are malfunctioning.
 AV communication signal between AV
control unit and BOSE amp. is malfunc-
tioning.BOSE amp. power supply and ground cir-
cuits
Refer to AV- 2 3 8 , "
BOSE AMP. : Diagnosis
Procedure".
 AV COMM CIRCUIT [U1300]
 DVD DECK CONN [U1248]When either one of the following items is
detected:
 DVD player power supply and ground cir-
cuits are malfunctioning.
 AV communication circuits between
BOSE amp. and DVD player are mal-
functioning.
 AV communication signal between AV
control unit and DVD player is malfunc-
tioning. DVD player power supply and ground cir-
cuits
Refer to AV- 2 3 9 , "
DVD PLAYER : Diag-
nosis Procedure"
 AV communication circuits between
BOSE amp. and DVD player
 AV COMM CIRCUIT [U1300]
 AMP CONN [U1252]When either one of the following items is
detected:
 camera control unit power supply and
ground circuits are malfunctioning.
 AV communication signal between AV
control unit and Camera control unit is
malfunctioning.Camera control unit power supply and
ground circuits
Refer to AV- 2 3 9 , "
CAMERA CONTROL
UNIT : Diagnosis Procedure".
 AV COMM CIRCUIT [U1300]
 DVD DECK CONN [U1248]
 AMP CONN [U124E]When either one of the following items is
detected:
 AV communication circuits between cam-
era control unit and BOSE amp. are mal-
functioning.
 AV communication signal between AV
control unit and BOSE amp. is malfunc-
tioning.AV communication circuits between cam-
era control unit and BOSE amp.
 AV COMM CIRCUIT [U1300]
 DVD DECK CONN [U1248]
 AMP CONN [U124E]
 REAR-CAMERA LAN CONN [U1252]With rear control switch
When either one of the following items is
detected:
 malfunction is detected in AV communi-
cation circuits between rear control
switch and camera control unit.
 malfunction is detected in AV communi-
cation circuits between camera control
unit and NAVI control unit.  AV communication circuits between mul-
tifunction switch and rear control switch
 AV communication circuits between rear
control switch and camera control unit
Without rear control switch
When either one of the following items is
detected:
 malfunction is detected in AV communi-
cation circuits between multifunction
switch and camera control unit.
 malfunction is detected in AV communi-
cation circuits between camera control
unit and NAVI control unit.AV communication circuits between multi-
function switch and camera control unit
 AV COMM CIRCUIT [U1300]
 SWITCH CONN [U1240]
 DVD DECK CONN [U1248]
 AMP CONN [U124E]
 REAR-CAMERA LAN CONN [U1252]When either one of the following items is
detected:
 AV communication circuits between AV
control unit and multifunction switch are
malfunctioning.
 AV communication signal between AV
control unit and multifunction switch is
malfunctioning.AV communication circuits between AV
control unit and multifunction switch Error item Detection logic Possible malfunction factor/Action to take

AV
DIAGNOSIS SYSTEM (AV CONTROL UNIT)
AV-215
< FUNCTION DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
MB A
O
P
 For each signal, actual signal can be compared with the condition recognized on the system.
SELECTION FROM MENU
Allows the technician to select which vehicle signals should be displayed and displays the status of the
selected vehicle signals.
Display Item Display Vehicle status Remarks
VHCL SPD SIGOn Vehicle speed >0 km/h (0 MPH)
Changes in indication may be delayed. This is
normal. Off Vehicle speed =0 km/h (0 MPH)
PKB SIGOn Parking brake is applied.
Off Parking brake is released.
ILLUM SIGOnBlock the light beam from the auto
light optical sensor when the light
switch is ON .
—
OffExpose the auto light optical sensor
to light when the light switch is OFF
or ON.
IGN SIGOn Ignition switch ON
Off Ignition switch in ACC position
REV SIGOn Selector lever in R position
Changes in indication may be delayed. This is
normal.
OffSelector lever in any position other
than R
Item to be selected Description
VHCL SPD SIG
The same as when “ALL SIGNALS”
is selected. PKB SIG
ILLUM SIG
IGN SIG
REV SIG

AV-216
< COMPONENT DIAGNOSIS >[BOSE AUDIO WITHOUT NAVIGATION]
U1000 CAN COMM CIRCUIT
COMPONENT DIAGNOSIS
U1000 CAN COMM CIRCUIT
DescriptionINFOID:0000000003765661
CAN (Controller Area Network) is a serial communication line for real time application. It is an on-vehicle mul-
tiplex communication line with high data communication speed and excellent error detection ability. Many elec-
tronic control units are equipped onto a vehicle, and each control unit shares information and links with other
control units during operation (not independent). In CAN communication, control units are connected with 2
communication lines (CAN-H, CAN-L) allowing a high rate of information transmission with less wiring. Each
control unit transmits/receives data but selectively reads required data only.
CAN Communication Signal Chart. Refer to LAN-22, "
CAN Communication Signal Chart".
DTC LogicINFOID:0000000003765662
DTC DETECTION LOGIC
Diagnosis ProcedureINFOID:0000000003765663
1.PERFORM SELF DIAGNOSTIC
1. Turn ignition switch ON and wait for 2 seconds or more.
2. Check “Self Diagnostic Result” of “MULTI AV”.
Is
“CAN COMM CIRCUIT” displayed?
YES >> Refer to “LAN system”. Refer to LAN-14, "Trouble Diagnosis Flow Chart".
NO >> Refer to GI section. Refer to GI-35, "
Intermittent Incident".
DTCDisplay contents of CON-
SULT-IIIDiagnostic item is detected when... Probable malfunction location
U1000 CAN COMM CIRCUITWhen AV control unit is not transmitting or re-
ceiving CAN communication signal for 2 sec-
onds or more.CAN communication system