2011 INFINITI QX56 BATTERY

DAS-58
< DTC/CIRCUIT DIAGNOSIS >[ADAS CONTROL UNIT]
C1A01 POWER SUPPLY CIRCUIT 1,
C1A02 POWER SUPPLY CIRCUIT 2
C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2
DTC LogicINFOID:0000000006223483
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the MAIN switch of ICC system ON.
3. Perform “All DTC Reading” with CONSULT-III.
4. Check if the “C1A01” or “C1A02” is detected as t he current malfunction in “Self Diagnostic Result” of “ICC/
ADAS”.
Is
“C1A01” or “C1A02” detected as the current malfunction?
YES >> Refer to DAS-58, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006223484
1.CHECK ADAS CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit of ADAS control unit. Refer to DAS-62, "
Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> Repair or replace the malfunctioning parts.
DTC
(On board dis-
play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A01 (1) POWER SUPPLY
CIR The battery voltage sent to ADAS control unit re-
mains less than 7.9 V for 5 seconds
 Connector, harness, fuse
 ADAS control unit
C1A02
(2) POWER SUPPLY
CIR 2 The battery voltage sent to ADAS control unit re-
mains more than 19.3 V for 5 seconds
Revision: 2010 May2011 QX56

DAS-62
< DTC/CIRCUIT DIAGNOSIS >[ADAS CONTROL UNIT]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
Diagnosis ProcedureINFOID:0000000006223493
1.CHECK ADAS CONTROL UNIT POWER SUPPLY CIRCUIT
Check voltage between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> GO TO 2.
NO >> Repair the ADAS control unit power supply circuit.
2.CHECK ADAS CONTROL UNIT GROUND CIRCUIT
1. Turn the ignition switch OFF.
2. Disconnect the ADAS control unit connector.
3. Check for continuity between ADAS control unit harness connector and ground.
Is the inspection result normal?
YES >> INSPECTION END
NO >> Repair the ADAS control unit ground circuit.
Te r m i n a l Condition
Voltag e
(Approx.)
(+) (–)
ADAS control unit
GroundIgnition
switch
Connector Terminal
B61 16 OFF 0 V
ON Battery volt-
age
ADAS control unit
GroundContinuity
Connector Terminal
B61 6 Existed
Revision: 2010 May2011 QX56

DAS-64
< PRECAUTION >[DCA]
PRECAUTIONS
PRECAUTION
PRECAUTIONS
Precaution for Supplemental Restraint S
ystem (SRS) "AIR BAG" and "SEAT BELT
PRE-TENSIONER"
INFOID:0000000006223495
The Supplemental Restraint System such as “A IR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severi ty of injury to the driver and front passenger for certain
types of collision. This system includes seat belt switch inputs and dual stage front air bag modules. The SRS
system uses the seat belt switches to determine the front air bag deployment, and may only deploy one front
air bag, depending on the severity of a collision and w hether the front occupants are belted or unbelted.
Information necessary to service the system safely is included in the “SRS AIR BAG” and “SEAT BELT” of this
Service Manual.
WARNING:
 To avoid rendering the SRS inopera tive, which could increase the risk of personal injury or death in
the event of a collision that would result in air bag inflation, all maintenance must be performed by
an authorized NISS AN/INFINITI dealer.
 Improper maintenance, including in correct removal and installation of the SRS, can lead to personal
injury caused by unintent ional activation of the system. For re moval of Spiral Cable and Air Bag
Module, see the “SRS AIR BAG”.
 Do not use electrical test equipmen t on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identi fied by yellow and/or orange harnesses or har-
ness connectors.
PRECAUTIONS WHEN USING POWER TOOLS (AIR OR ELECTRIC) AND HAMMERS
WARNING:
 When working near the Air Bag Diagnosis Sensor Unit or other Air Bag System sensors with the ignition ON or engine running, DO NOT use air or electric power tools or strike near the sensor(s)
with a hammer. Heavy vibration could activate the sensor(s) and deploy the air bag(s), possibly
causing serious injury.
 When using air or electric power tools or hammers , always switch the ignition OFF, disconnect the
battery, and wait at least 3 minu tes before performing any service.
Precautions For Harness RepairINFOID:0000000006223496
ITS communication uses a twisted pair line. Be careful when repairing it.
 Solder the repaired area and wrap tape around the soldered area.
NOTE:
A fray of twisted lines must be within 110 mm (4.33 in).
SKIB8766E
Revision: 2010 May2011 QX56

DAS-98
< ECU DIAGNOSIS INFORMATION >[DCA]
ADAS CONTROL UNIT
Fail-safe
INFOID:0000000006223511
If a malfunction occurs in each system, ADAS contro l unit cancels each control, sounds a beep, and turns ON
the warning lamp or indicator lamp.
Te r m i n a l N o .
(Wire color) Description
Condition Va l u e
(Approx.)
+ − Signal name Input/
Output
1
(V/W)
Ground Warning systems
switch
InputIgnition
switch ON When warning systems
switch is not pressed
12 V
When warning systems
switch is pressed 0 V
3
(R/Y) IBA OFF switch Input Ignition
switch
ON When IBA OFF switch is
not pressed
12 V
When IBA OFF switch is
pressed 0 V
4
(LG/B) Warning systems ON
indicator
OutputIgnition
switch ON Warning systems ON indi-
cator ON
0 V
Warning systems ON indi-
cator OFF 12 V
5
(R) ICC brake hold relay
drive signal
OutputIgnition
switch ON —12 V
At “STOP LAMP” test of
“Active test” 0 V
6
(B) Ground — Ignition
switch ON —0 V
7
(L) ITS communication-H — — — —
8
(Y) ITS communication-L — — — —
12
(G/R) Warning buzzer signal Output Ignition
switch ON Warning buzzer operation 0 V
Warning buzzer not oper-
ating
12 V
14
(L) CAN -H — — — —
15
(P) CAN -L — — — —
16
(W/G) Ignition power supply Input Ignition switch ON Battery Voltage
System Buzzer Warning lamp/Indicator lamp Description
Vehicle-to-vehicle distance control mode High-pitched
toneICC system warn
ing lamp Cancel
Conventional (fixed speed) cruise control mode High-pitched
tone
ICC system warn
ing lamp Cancel
Intelligent Brake Assist (IBA) High-pitched
toneIBA OFF indicator lamp Cancel
Forward Collision Warning (FCW) High-pitched
toneIBA OFF indicator lamp Cancel
Distance Control Assist (DCA) High-pitched
tone
ICC system warn
ing lamp Cancel
Lane Departure Warning (LDW) — Lane departure warning lamp Cancel
Revision: 2010 May2011 QX56

DAS
ICC SENSORDAS-105
< ECU DIAGNOSIS INFORMATION > [DCA]
C
D
E
F
G H
I
J
K L
M B
N P A
Fail-safeINFOID:0000000006228057
If a malfunction occurs in the ICC sensor, ADAS cont rol unit cancels control, sounds a beep, and turns ON the
ICC system warning lamp in the combination meter.
DTC Inspection Priority ChartINFOID:0000000006228058
If multiple DTCs are detected simultaneously, che ck them one by one depending on the following DTC inspec-
tion priority chart.
DTC IndexINFOID:0000000006228059
NOTE:
 The details of time display are as per the following.
- 0: The malfunctions that are detected now
CAN communication system (U1000, U1010)
- 1 - 39: It increases like 0 → 1 → 2 ··· 38 → 39 after returning to the normal condition whenever the ignition
switch OFF → ON. It returns to 0 when a malfunc tion is detected again in the process.
- If it is over 39, it is fixed to 39 unt il the self-diagnosis results are erased.
Other than CAN communication s ystem (Other than U1000, U1010)
- 1 - 49: It increases like 0 → 1 → 2 ··· 38 → 49 after returning to the normal condition whenever the ignition
switch OFF → ON. It returns to 0 when a malfunc tion is detected again in the process.
- If it is over 49, it is fixed to 49 unt il the self-diagnosis results are erased.
Te r m i n a l N o .
(Wire color) Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
1
(W/G)
GroundIgnition power supply Input Ignition switch ON Battery voltage
3
(L) ITS communication-H — — —
4
(B) Ground — Ignition switch ON 0 V
6
(Y) ITS communication-L — — —
Priority Detected items (DTC)
1  U1000: CAN COMM CIRCUIT
 U1010: CONTROL UNIT (CAN)
2  C1A50: ADAS MALFUNCTION
3  C1A01: POWER SUPPLY CIR
 C1A02: POWER SUPPLY CIR 2
 C1A12: LASER BEAM OFFCNTR
 C1A16: RADAR STAIN
 C1A18: LASER AIMING INCMP
 C1A21: UNIT HIGH TEMP
 C1A39: STRG SEN CIR
 U0104: ADAS CAN CIR1
 U0121: VDC CAN CIR2
 U0126: STRG SEN CAN CIR1
 U0405: ADAS CAN CIR2
 U0415: VDC CAN CIR1
 U0428: STRG SEN CAN CIR2
4  C1A00: CONTROL UNIT
Revision: 2010 May2011 QX56

DAS
ACCELERATOR PEDAL ACTUATORDAS-107
< ECU DIAGNOSIS INFORMATION > [DCA]
C
D
E
F
G H
I
J
K L
M B
N P A
ACCELERATOR PEDAL ACTUATOR
Reference ValueINFOID:0000000006223518
VALUES ON THE DIAGNOSIS TOOL
TERMINAL LAYOUT
PHYSICAL VALUES
Monitor item Condition Value/Status
TGT FBK FRC Drive the vehicle and
operate the DCA sys-
temWhen the ADAS control unit is control-
ling the accelerator pedal actuator
It changes with the demand from
the ADAS control unit
TGT MOT POSI NOTE:
The item is indicated, but not used. —
ACT MOT POSI Engine running Depress accelerator pedal It changes according to the de-
pressed amount of accelerator
pedal
AP OPEN Engine running Depress accelerator pedal It changes according to the de-
pressed amount of accelerator pedal
APA TEMP Engine running Display the accelerator pedal ac-
tuator integrated motor tempera- ture
APA CURRENT Drive the vehicle and
operate the DCA sys-
temWhen the ADAS control unit is control-
ling the accelerator pedal actuator Display the accelerator pedal ac-
tuator motor operation consump-
tion current
APA PWR Ignition switch ON Battery voltage
APA OPE STATS Engine running When the accelerator pedal actuator
control is permitted
On
When the accelerator pedal actuator
control is invalid Off
APA STATS Engine running When the accelerator pedal actuator is
normal
Ready
When the accelerator pedal actuator is
temporarily malfunctioning TP NG
When the accelerator pedal actuator is
malfunctioning NG
During the accelerator pedal actuator
operation preparations Init
JSOIA0231ZZ
Revision: 2010 May2011 QX56

DAS-108
< ECU DIAGNOSIS INFORMATION >[DCA]
ACCELERATOR PEDAL ACTUATOR
DTC Inspection Priority Chart
INFOID:0000000006223519
If multiple DTCs are detected simultaneously, chec k them one by one depending on the following DTC inspec-
tion priority chart.
DTC IndexINFOID:0000000006223520
NOTE:
 The details of time display are as per the following.
- CRNT: A malfunction is detected now
- PAST: A malfunction was detected in the past
 IGN counter is displayed in FFD (Freeze Frame Data).
- 0: The malfunctions that are detected now
- 1 - 39: It increases like 0 → 1 → 2 ··· 38 → 39 after returning to the normal condition whenever the ignition
switch OFF → ON. It returns to 0 when a malfunction is detected again in the process.
- If it is over 39, it is fixed to 39 until the self-diagnosis results are erased.
× : Applicable
Te r m i n a l N o .
(Wire color) Description
ConditionVa l u e
(Approx.)
+ – Signal name Input/
Output
1
(B/O)
Ground Battery power supply Input Ignition switch OFF Battery voltage
2
(B) Ground — Ignition switch ON 0 V
3
(W/G) Ignition power supply Input Ignition switch ON Battery voltage
4
(Y) ITS communication-L — — —
5
(L) ITS communication-H — — —
Priority Detected items (DTC)
1  U1000: CAN COMM CIRCUIT
 U1010: CONTROL UNIT (CAN)
2  C1F02: APA C/U MALF
3  C1F01: APA MOTOR MALF
 C1F03: APA HI TEMP
 C1F05: APA PWR SUPLY CIR
 C1F06: CAN CIR2
 C1F07: CAN CIR1
CONSULT-III display ICC system warnin
g lamp Fail-safe function Reference
C1F01: APA MOTOR MALF ON ×DAS-166
C1F02: APA C/U MALF ON ×DAS-168
C1F03: APA HI TEMP — — DAS-170
C1F05: APA PWR SUPLY CIR ON×DAS-171
C1F06: CAN CIR2 ON ×DAS-173
C1F07: CAN CIR1 ON ×DAS-174
U1000: CAN COMM CIRCUIT ON ×DAS-182
U1010: CONTROL UNIT (CAN) ON ×DAS-184
Revision: 2010 May2011 QX56

DAS-130
< DTC/CIRCUIT DIAGNOSIS >[DCA]
C1A01 POWER SUPPLY CIRCUIT 1,
C1A02 POWER SUPPLY CIRCUIT 2
C1A01 POWER SUPPLY CIRCUIT 1, C1A02 POWER SUPPLY CIRCUIT 2
DTC LogicINFOID:0000000006223531
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1.PERFORM DTC CONFIRMATION PROCEDURE
1. Start the engine.
2. Turn the DCA system ON.
3. Perform “All DTC Reading” with CONSULT-III.
4. Check if the “C1A01” or “C1A02” is detected as t he current malfunction in “Self Diagnostic Result” of “ICC/
ADAS”.
Is
“C1A01” or “C1A02” detected as the current malfunction?
YES >> Refer to DAS-130, "Diagnosis Procedure".
NO >> Refer to GI-40, "
Intermittent Incident".
Diagnosis ProcedureINFOID:0000000006223532
1.CHECK ADAS CONTROL UNIT POWER SUPPLY AND GROUND CIRCUIT
Check power supply and ground circuit of ADAS control unit. Refer to DAS-195, "
ADAS CONTROL UNIT :
Diagnosis Procedure".
Is the inspection result normal?
YES >> Replace the ADAS control unit. Refer to DAS-63, "Removal and Installation".
NO >> Repair or replace the malfunctioning parts.
DTC
(On board dis-
play) Trouble diagnosis
name DTC detecting condition Possible causes
C1A01 (1) POWER SUPPLY
CIR The battery voltage sent to ADAS control unit re-
mains less than 7.9 V for 5 seconds
 Connector, harness, fuse
 ADAS control unit
C1A02
(2) POWER SUPPLY
CIR 2 The battery voltage sent to ADAS control unit re-
mains more than 19.3 V for 5 seconds
Revision: 2010 May2011 QX56