2003 NISSAN TEANA engine control

TROUBLE DIAGNOSES WORK FLOW
LAN-27
[CAN FUNDAMENTAL]
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2. CAN DIAG SUPPORT MNTR: Check each item on “CAN DIAG SUPPORT MNTR”. Draw a line on the
diagnosis sheet to indicate the error circuit.
a. Reception item of “ENGINE”: On “TCM”, “UNKWN” is indicated. This means ECM cannot receive the sig-
nal from TCM. Draw a line to indicate an error between ECM and TCM (line 2-a in the figure).
NOTE:
If “UNKWN” is indicated on “TRANSMIT DIAG”, then the control unit cannot transmit CAN communication
signal to each unit. Draw a line between the control unit and the splice.
b. Reception item of “ADAPTIVE LIGHT”: On “TCM”, “UNKWN” is indicated. This means AFS cannot
receive the signal from TCM. Draw a line to indicate an error between AFS and TCM (line 2-b in the fig-
ure).
c. Reception item of “MULTI AV”: “UNKWN” is not indicated. This indicates normal communication between
AV and its receiving units. Do not draw any line.
SKIB8725E

HOW TO USE THIS SECTION
LAN-41
[CAN]
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HOW TO USE THIS SECTIONPFP:00008
CautionBKS002DH

This section describes information specific to a vehicle, sheets for trouble diagnosis, and inspection pro-
cedures.

For trouble diagnosis procedure, refer to LAN-17, "Trouble Diagnosis Procedure" .
Abbreviation ListBKS002DI
Abbreviations in CAN communication signal chart and the diagnosis sheet are as per the following list.
Abbreviation Unit nameSELECT SYSTEM
(CONSULT-II)CAN DIAG SUPPORT MNTR
(CONSULT-II)
ABS ABS actuator and electric unit (control unit) ABS VDC/TCS/ABS
ADP Driver seat control unit AUTO DRIVE POS. –
AFS AFS control unit ADAPTIVE LIGHT –
BCM BCM BCM BCM/SEC
DISPDisplay unit
– DISPLAY
Display control unit
DLC Data link connector – –
ECM ECM ENGINE ECM
I-KEY Intelligent Key unit INTELLIGENT KEY I-KEY
IPDM-E IPDM E/R IPDM E/R IPDM E/R
M&A Unified meter and A/C amp. METER A/C AMP METER/M&A
STRG Steering angle sensor – STRG
TCM TCMA/T
TCM
TRANSMISSION

LAN-44
[CAN]
TROUBLE DIAGNOSIS

TROUBLE DIAGNOSISPFP:00004
CAN Diagnostic Support MonitorBKS002DN
Use “CAN DIAG SUPPORT MNTR” for detecting the root cause.
MONITOR ITEM LIST (CONSULT-II)
ECM
NOTE:
Replace the unit when “NG” is indicated on the “INITIAL DIAG”.
Driver seat control unit
NOTE:
Replace the unit when “NG” is indicated on the “INITIAL DIAG”.
AFS control unit
0: Error at present, 1 – 39: Error in the past (Number means the number of times the ignition switch is turned OFF→ON)
*: 39 or higher number is fixed at 39 until the self-diagnosis result is erased.SELECT SYS-
TEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT
ENGINEINITIAL DIAG Status of CAN controller
OKNG
TRANSMIT DIAG Signal transmission status
UNKWN TCM Signal receiving status from the TCM
VDC/TCS/ABSModels with VDC: Signal receiving status from the ABS actuator
and electric unit (control unit)
Models with ABS: Not used even though indicated
METER/M&A Signal receiving status from the unified meter and A/C amp. OK UNKWN
ICC Not used even though indicated
BCM/SEC Signal receiving status from the BCM
OK UNKWN
IPDM E/R Signal receiving from the IPDM E/R
AWD/4WD/e4WD
Not used even though indicated
EPS
SELECT SYS-
TEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT
AUTO DRIVE
POS.INITIAL DIAG Status of CAN controller
OKNG
TRANSMIT DIAG Signal transmission status
UNKWN BCM/SEC Signal receiving status from the BCM
METER/M&A Signal receiving status from the unified meter and A/C amp.
TCM Signal receiving status from the TCM
SELECT SYS-
TEMCAN DIAG SUP-
PORT MNTRDescriptionNormal Error
PRSNT PAST PRSNT PAST
ADAPTIVE
LIGHTTRANSMIT DIAG Not used even though indicated
ECM Signal receiving status from the ECM
OKOK
or
1 – 39
*UNKWN 0 METER/M&ASignal receiving status from the unified
meter and A/C amp.
TCM Signal receiving status from the TCM
STRGSignal receiving status from the steering
angle sensor
EPS Not used even though indicated
IPDM E/R Signal receiving status from the IPDM E/R OKOK
or
1 – 39
*UNKWN 0

TROUBLE DIAGNOSIS
LAN-49
[CAN]
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CAN System Specification ChartBKS002DO
Determine CAN system type from the following specification chart. Then choose the correct diagnosis sheet.
NOTE:
Refer to LAN-19, "
CHECK OF CAN SYSTEM TYPE (HOW TO USE CAN SYSTEM TYPE SPECIFICATION
CHART)" for how to use CAN system specification chart.
×: ApplicableBody typeSedan
Axle2WD
Engine QR20DE/VQ23DE VQ23DE VQ35DE
Transmission A/T CVT
Brake control ABS VDC
Automatic drive positioner×××
Adaptive front-lighting system××
Intelligent Key system××
Integrated display system××
Integrated color display system××
CAN system type 1 2 3 4
Diagnosis sheetLAN-64, "
DIAG-
NOSIS SHEET"
LAN-65, "DIAG-
NOSIS SHEET"
LAN-66, "DIAG-
NOSIS SHEET"
LAN-67, "DIAG-
NOSIS SHEET"
CAN communication signal chartLAN-51, "TYPE 1/TYPE 2"LAN-52, "TYPE 3"LAN-54, "TYPE 4"

TROUBLE DIAGNOSIS
LAN-51
[CAN]
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CAN Communication Signal ChartBKS002DP
Refer to LAN-15, "How to Use CAN Communication Signal Chart" for how to use CAN communication signal
chart.
TYPE 1/TYPE 2
NOTE:
Refer to LAN-41, "
Abbreviation List" for the abbreviations of the connecting units.
T: Transmit R: Receive
Signals
ECM
ADP
BCM
M&A
DISP
TCM
ABS
IPDM-E
A/C compressor request signal T R
Accelerator pedal position signal T R
Closed throttle position signal T R
Cooling fan speed request signal T R
Engine and A/T integrated control signalTR
RT
Engine coolant temperature signal T R
Engine speed signal T R
Fuel consumption monitor signalTR
TR
Malfunction indicator signal T R
Wide open throttle position signal T R
A/C switch signal R T
Blower fan motor switch signal R T
Buzzer output signal T R
Door switch signal R T R R
Front fog light request signal T R R
Front wiper request signal T R
High beam request signal T R R
Ignition switch signal R T R
Key fob door unlock signal R T
Key fob ID signal R T
Key switch signal R T
Low beam request signal T R
Oil pressure switch signalRT
TR
Position light request signal T R R
Rear fog status signal T R
Rear window defogger switch signal T R
Sleep wake up signal T R R
Turn indicator signal T R
3rd position switch signal T R
A/C switch/indicator signalRT
TR
Distance to empty signal T R
Fuel level low warning signal T R
Stop lamp switch signal T R

LAN-52
[CAN]
TROUBLE DIAGNOSIS

*: P range only
TYPE 3
NOTE:
Refer to LAN-41, "
Abbreviation List" for the abbreviations of the connecting units.
T: Transmit R: Receive Vehicle speed signalRT
RRR T R
A/T CHECK indicator lamp signal R T
A/T position indicator lamp signal
R
*RT
Output shaft revolution signal R T
ABS warning lamp signal R T
Brake warning lamp signal R T
Front wiper stop position signal R T
High beam status signal R T
Low beam status signal R T
Rear window defogger control signal R R R TSignals
ECM
ADP
BCM
M&A
DISP
TCM
ABS
IPDM-E
SignalsECM
ADP
AFS
BCM
I-KEY
M&A
STRG
DISP
TCM
ABS
IPDM-E
A/C compressor request signal TR
Accelerator pedal position signal T R R
Closed throttle position signal T R
Cooling fan speed request signal TR
Engine and A/T integrated control signalTR
RT
Engine coolant temperature signal T R
Engine speed signal T R R
Fuel consumption monitor signalTR
TR
Malfunction indicator signal T R
Wide open throttle position signal T R
A/C switch signal R T
Blower fan motor switch signal R T
Buzzer output signalTR
TR
Door lock/unlock status signal T R
Door switch signal R T R R R
Front fog light request signal T R R
Front wiper request signal T R
High beam request signal T R R
Ignition switch signal R T R
Key fob door unlock signal R T
Key fob ID signal R T
Key switch signal R T

LAN-54
[CAN]
TROUBLE DIAGNOSIS

TYPE 4
NOTE:
Refer to LAN-41, "
Abbreviation List" for the abbreviations of the connecting units.
T: Transmit R: Receive
Signals
ECM
ADP
AFS
BCM
I-KEY
M&A
STRG
DISP
TCM
ABS
IPDM-E
A/C compressor request signal TR
Accelerator pedal position signal T R R
ASCD CRUISE lamp signal T R
ASCD SET lamp signal T R
Closed throttle position signal T R
Cooling fan speed request signal TR
Engine and CVT integrated control signalTR
RT
Engine coolant temperature signal T R
Engine speed signal T R R R
Fuel consumption monitor signalTR
TR
Malfunction indicator signal T R
Wide open throttle position signal T R
A/C switch signal R T
Blower fan motor switch signal R T
Buzzer output signalTR
TR
Door lock/unlock status signal T R
Door switch signal R T R R R
Front fog light request signal T R R
Front wiper request signal T R
High beam request signal T R R
Ignition switch signal R T R
Key fob door unlock signal R T
Key fob ID signal R T
Key switch signal R T
Low beam request signal T R
Oil pressure switch signalRT
TR
Position light request signal T R R
Rear fog status signal T R
Rear window defogger switch signal T R
Sleep wake up signalTRR R
RT
Turn indicator signal T R
Door lock/unlock/trunk open request signal R T
Hazard warning lamp request signal R T
Ignition knob switch signal R T
Key warning signal T R

TROUBLE DIAGNOSIS
LAN-73
[CAN]
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3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ECM. Refer to EC-70, "
Circuit Diagram" (QR engine),
EC-413, "
Circuit Diagram" (VQ engine).
OK or NG
OK >>
Present error: Replace the ECM. Refer to EC-47, "Procedure After Replacing ECM" (QR
engine), EC-389, "
Procedure After Replacing ECM" (VQ engine).

Past error: Error was detected in the ECM branch line.
NG >> Repair the power supply and the ground circuit.
Driver Seat Control Unit Branch Line CircuitBKS002EE
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and con-
nector side).
–Driver seat control unit connector
–Harness connector B46
–Harness connector B116
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of driver seat control unit.
2. Check the resistance between the driver seat control unit harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the driver seat control unit branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the driver seat control unit. Refer to SE-17, "
Schematic" .
OK or NG
OK >>
Present error: Replace the driver seat control unit. Refer to SE-103, "Removal and Installation"
.

Past error: Error was detected in the driver seat control unit branch line.
NG >> Repair the power supply and the ground circuit.
Driver seat control unit harness connector
Resistance (Ω)
Connector No. Terminal No.
B117 2 12 Approx. 54 – 66