Unified NISSAN TEANA 2003 Repair Manual

DTC P0826 MANUAL MODE SWITCH CIRCUIT
CVT-113
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DTC P0826 MANUAL MODE SWITCH CIRCUITPFP:34901
DescriptionBCS001JN
Manual mode switch is installed in CVT control device. The manual mode switch sends shift up and shift down
switch signals to TCM.
TCM sends the switch signals to unified meter and A/C amp via CAN communication line. Then manual mode
switch position is indicated on the shift position indicator. For inspection, refer to CVT-159, "
Diagnostic Proce-
dure" .
CONSULT-II Reference ValueBCS001JO
On Board Diagnosis LogicBCS001JP
Diagnostic trouble code “P0826 MANUAL MODE SWITCH” with CONSULT-II is detected when TCM monitors
Manual mode, Non manual mode, Up or Down switch signal, and then detects irregular with impossible input
pattern for 1 second or more.
Possible CauseBCS001JQ

Harness or connectors
(These switches circuit is open or shorted.)
(TCM, and unified meter and A/C amp circuit are open or shorted.)
(CAN communication line is open or shorted.)

Manual mode select switch (Built into CVT control device)

Manual mode position select switch (Built into CVT control device)
DTC Confirmation ProcedureBCS001JR
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously conducted, always turn ignition switch OFF and
wait at least 10 seconds before conducting the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “DATA MONITOR” mode for “TRANSMISSION” with
CONSULT-II.
3. Start engine.
4. Move selector lever to “M” position.
5. Drive vehicle for at least 2 consecutive seconds.
6. If DTC is detected, go to CVT-115, "
Diagnostic Procedure" .
Item name Condition Display value
MMODEManual shift gate position (neutral) ON
Other than the above OFF
NON MMODEManual shift gate position (neutral, +side, -side) OFF
Other than the above ON
UPLVRSelector lever: + side ON
Other than the above OFF
DOWNLVRSelector lever: - side ON
Other than the above OFF
BCIA0031E

DTC P0826 MANUAL MODE SWITCH CIRCUIT
CVT-115
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TCM terminal data are reference values, measured between each terminal and ground.
Diagnostic ProcedureBCS001JU
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis check. Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
Is any malfunction of the
“U1000 CAN COMM CIRCUIT” indicated?
YES >> Check CAN communication line. Refer to CVT-53, "DTC U1000 CAN COMMUNICATION LINE" .
NO >> GO TO 2.
2. CHECK MANUAL MODE SWITCH CIRCUIT
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for
“TRANSMISSION” with CONSULT-II.
3. Read out ON/OFF switching action of the “MMODE”, “NON M-
MODE”, “UPLVR”, “DOWNLVR”.
Without CONSULT-II
Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of the
position mutually coincide when the selector lever is shifted to the “+ (up)” or “- (down)” side (1st ⇔ 6th gear).
OK or NG
OK >> GO TO 7.
NG >> GO TO 3.
3. CHECK MANUAL MODE SWITCH
Check manual mode switch. Refer to CVT-117, "
Component Inspection" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK SELF-DIAGNOSTIC RESULTS (UNIFIED METER AND A/C AMP)
Perform self-diagnosis check. Refer to DI-29, "
CONSULT-II Function (METER A/C AMP)" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 5.
TerminalWire
colorItem Condition Data (Approx.)
5 L CAN-H — —
6 P CAN-L — —
Item name Condition Display value
MMODEManual shift gate posi-
tion (neutral)ON
Other than the above OFF
NON MMODEManual shift gate posi-
tion (neutral, +side, -side)OFF
Other than the above ON
UPLVRSelector lever: + side ON
Other than the above OFF
DOWNLVRSelector lever: - side ON
Other than the above OFF
SCIA4588E

CVT-116
DTC P0826 MANUAL MODE SWITCH CIRCUIT

5. CHECK SELF-DIAGNOSTIC RESULTS (COMBINATION METER)
Perform self-diagnosis check. Refer to DI-13, "
Self-Diagnosis Mode of Combination Meter" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 6.
6. CHECK MANUAL MODE SWITCH CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect CVT device connector and unified meter and A/C amp connector.
3. Check continuity between CVT device harness connector termi-
nals and unified meter and A/C amp harness connector termi-
nals.
4. Check continuity between CVT device harness connector termi-
nal and ground.
5. If OK, check harness for short to ground and short to power.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 7.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors.
7. CHECK DTC
Perform “DTC Confirmation Procedure”. Refer to CVT-113, "
DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 8.
8. CHECK TCM
1. Check TCM input/output signal. Refer to CVT-40, "
TCM Input/Output Signal Reference Values" .
2. If NG, re-check TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Item Connector Terminal Continuity
CVT device harness connector M92 3
Ye s
Unified meter and A/C amp
harness connectorM41 3
CVT device harness connector M92 7
Ye s
Unified meter and A/C amp
harness connectorM41 14
CVT device harness connector M92 8
Ye s
Unified meter and A/C amp
harness connectorM41 4
CVT device harness connector M92 12
Ye s
Unified meter and A/C amp
harness connectorM41 13
SCIA4589E
Item Connector Terminal Continuity
CVT device harness connector M92 11 Yes
SCIA4590E

CVT INDICATOR CIRCUIT
CVT-159
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CVT INDICATOR CIRCUITPFP:24810
DescriptionBCS001M6
TCM sends the switch signals to unified meter and A/C amp via CAN communication line. Then manual mode
switch position is indicated on the CVT indicator.
CONSULT-II Reference ValueBCS001M7
Diagnostic ProcedureBCS001M8
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Start engine.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “TRANSMISSION” with CONSULT-II and read
out the value of “M GEAR POS”.
3. Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of
the position mutually coincide when the select lever is shifted to the “+ (up)” or “- (down)” side (1st ⇔ 6th
gear).
OK or NG
OK >>INSPECTION END
NG >> Check the following.
CVT INDICATOR SYMPTOM CHART
Item name Condition Display value
M GEAR POS During driving 1, 2, 3, 4, 5, 6
Items Presumed location of trouble
The actual gear position does not change, or shifting into the
manual mode is not possible (no gear shifting in the manual mode
possible).
The shift position indicator is not indicated.

Manual mode switch
Refer to CVT-113, "
DTC P0826 MANUAL MODE SWITCH
CIRCUIT" .

CVT main system (Fail-safe function actuated)
Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
The actual gear position changes, but the shift position indicator
is not indicated.Perform the self-diagnosis function.
Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
The actual gear position and the indication on the shift position
indicator do not coincide.Perform the self-diagnosis function.
Refer to CVT-47, "
SELF-DIAGNOSTIC RESULT MODE" .
Only a specific position or positions is/are not indicated on the
shift position indicator.Check the meter control unit.
Refer to DI-4, "
COMBINATION METERS" .

CVT SHIFT LOCK SYSTEM
CVT-183
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Shift Lock Control Unit Reference ValuesBCS001MT
SHIFT LOCK HARNESS CONNECTOR TERMINALS LAYOUT
SHIFT LOCK CONTROL UNIT INSPECTION TABLE
Shift lock control unit terminal data are reference values, measured between each terminal and ground.
NOTE:
Take care that the pointer of circuit tester swings only momentarily because the output time is so short. If the inspection is done with an
oscilloscope, it should be observed that the power source voltage lasts for 3.5 to 10 ms.
SCIA2004E
Terminal
(Wire color)Item Condition Judgement standard
1
(Y/R)Power source Always Battery voltage
2
(L)Detention switch (for
key)When selector lever is not in “P” position with key
inserted or ignition knob switch pushed.Battery voltage
When selector lever is in “P” position with key
inserted.Approx. 0 V
3
(R)Detention switch (for
shift)When selector lever is not in “P” position. Battery voltage
When selector lever is in “P” position. Approx. 0 V
4
(R/G)Stop lamp switchWhen brake pedal is depressed Battery voltage
When brake pedal is released Approx. 0 V
5
(V/W)Vehicle speed signal
(8pulse signal)Speed meter is operatedRefer to DI-13, "
Terminals and Refer-
ence Value for Unified Meter and A/C
Amp." .
6
(G)Ignition signalIgnition switch: except ON Approx. 0 V
Ignition switch: ON Battery voltage
7
(R/W)Shift lock solenoid

When selector lever is in “P” position, brake
pedal is depressed, and ignition switch is ON.

When selector lever is not in “P” position, igni-
tion switch is ON, and vehicle speed is 10 km/h
(6 MPH) or less.

Within 3 minutes, after ignition switch turning to
other position from ON position, while selector
lever is not in “P” position and vehicle speed is
10 km/h (6 MPH) or less.Approx. 0 V
Except the above Battery voltage
8
(B)Ground — Approx. 0 V
9
(G/B)Key lock solenoidWhen selector lever is not “P” position.Battery voltage for approx. 0.1 sec.
(Note)
When selector lever is in “P” position. Approx. 0 V
10
(G/W)Key unlock solenoidWhen selector lever is in “P” position with ignition
switch in except ON position.Battery voltage for approx. 0.1 sec.
(Note)
Except the above. Approx. 0 V

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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DRIVER INFORMATION SYSTEM
PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 3
COMBINATION METERS ........................................... 4
System Description .................................................. 4
UNIFIED METER CONTROL UNIT ...................... 4
UNIFIED METER AND A/C AMP. ......................... 4
FAIL-SAFE ............................................................ 5
HOW TO CHANGE THE DISPLAY FOR ODO/
TRIP METER ........................................................ 6
POWER SUPPLY AND GROUND CIRCUIT ........ 6
SPEEDOMETER ................................................... 7
TACHOMETER ..................................................... 7
LOW WATER TEMPERATURE INDICATOR
LAMP, HIGH WATER TEMPERATURE WARN-
ING LAMP ............................................................. 7
FUEL GAUGE ....................................................... 7
Component Parts and Harness Connector Location ..... 7
Arrangement of Combination Meter ......................... 8
Internal Circuit .......................................................... 9
Wiring Diagram — METER — ................................ 10
Terminals and Reference Value for Combination
Meter ...................................................................... 12
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 13
Self-Diagnosis Mode of Combination Meter ........... 13
SELF-DIAGNOSIS MODE FUNCTION ............... 13
OPERATION PROCEDURE ............................... 13
CONSULT-II Function ............................................ 14
Trouble Diagnosis .................................................. 14
HOW TO PROCEED WITH TROUBLE DIAGNO-
SIS ...................................................................... 14
PRELIMINARY CHECK ...................................... 15
SYMPTOM CHART 1 .......................................... 17
SYMPTOM CHART 2 .......................................... 17
Power Supply and Ground Circuit Inspection ........ 18
Vehicle Speed Signal Inspection ............................ 20
Engine Speed Signal Inspection ............................ 21
Engine Coolant Temperature Signal Inspection ..... 21Fuel Level Sensor Signal Inspection ...................... 22
Fuel Gauge Does Not Move to FULL position ........ 23
Electrical Components Inspection .......................... 24
CHECK FUEL LEVEL SENSOR UNIT ................ 24
Removal and Installation of Combination Meter ..... 25
REMOVAL ........................................................... 25
INSTALLATION ................................................... 25
Disassembly and Assembly of Combination Meter ... 25
DISASSEMBLY ................................................... 26
ASSEMBLY ......................................................... 26
UNIFIED METER AND A/C AMP .............................. 27
System Description ................................................. 27
INPUT/OUTPUT SIGNALS ................................. 27
Schematic ............................................................... 28
CONSULT-II Function (METER A/C AMP) ............. 29
CONSULT-II BASIC OPERATION ....................... 29
SELF-DIAGNOSTIC RESULTS ........................... 29
DATA MONITOR ................................................. 30
DTC [U1000] CAN Communication Circuit ............. 32
DTC [B2202] Meter Communication Circuit ........... 32
DTC [B2205] Vehicle Speed Circuit ........................ 34
Removal and Installation of Unified Meter and A/C
Amp. ....................................................................... 34
REMOVAL ........................................................... 34
INSTALLATION ................................................... 34
WARNING LAMPS .................................................... 35
System Description ................................................. 35
OIL PRESSURE WARNING LAMP ..................... 35
Schematic ............................................................... 36
Wiring Diagram — WARN — .................................. 37
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 45
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 46
Electrical Component Inspection ............................ 47
OIL PRESSURE SWITCH ................................... 47
A/T INDICATOR ........................................................ 48
Wiring Diagram — AT/IND — ................................. 48
A/T Indicator Is Malfunction .................................... 50
CVT INDICATOR ....................................................... 52

DI-2 Wiring Diagram — CVTIND — ............................... 52
CVT Indicator Is Malfunction .................................. 54
WARNING CHIME ..................................................... 56
System Description ................................................. 56
POWER SUPPLY AND GROUND CIRCUIT ....... 56
IGNITION KEY WARNING CHIME (WITHOUT
INTELLIGENT KEY) ............................................ 56
IGNITION KEY WARNING CHIME (WITH INTEL-
LIGENT KEY) ...................................................... 57
LIGHT WARNING CHIME ................................... 57
Component Parts and Harness Connector Location ... 58
Schematic ............................................................... 59
Wiring Diagram — CHIME — ................................. 60
Terminals and Reference Value for BCM ................ 63
Terminals and Reference Value for Unified Meter
and A/C Amp. ......................................................... 64
Terminals and Reference Value for Combination
Meter ...................................................................... 65
CONSULT-II Function ............................................. 65
DIAGNOSTIC ITEMS DESCRIPTION ................. 65
CONSULT-II BASIC OPERATION PROCEDURE ... 65
DATA MONITOR .................................................. 65
ACTIVE TEST ...................................................... 66
Trouble Diagnosis ................................................... 66
HOW TO PROCEED WITH TROUBLE DIAGNO-
SIS ....................................................................... 66
PRELIMINARY CHECK ....................................... 66
Key Warning Chime and Light Warning Chime Does
Not Operated .......................................................... 67
Key Warning Chime Does Not Operate (Without
Intelligent Key) ........................................................ 69
Key Warning Chime Does Not Operate (With Intel-
ligent Key, When Mechanical Key Is Used) ............ 71
Key Warning Chime Does Not Operate (With Intel-
ligent Key, When Intelligent Key Is Carried With The
Driver) ..................................................................... 73
Light Warning Chime Does Not Operate ................. 75
CAN COMMUNICATION ........................................... 76
System Description ................................................. 76
CAN Communication Unit ....................................... 76

DI-4
COMBINATION METERS

COMBINATION METERSPFP:24814
System DescriptionBKS001RX
UNIFIED METER CONTROL UNIT

Speedometer, odo/trip meter, tachometer and fuel gauge are controlled by the unified meter control unit,
which is built into the combination meter. Unified meter control unit receives signals from unified meter
and A/C amp.

Warning lamp and indicator lamp of combination meter are controlled by signals drawn from the unified
meter and A/C amp.

Digital meter is adopted for odo/trip meter*.
*The record of the odo meter is kept even if the battery cable is disconnected. The record of the trip meter
is erased when the battery cable is disconnected.

Odo/trip meter and shift indicator segments can be checked in diagnosis mode.

Meters/gauges can be checked in diagnosis mode.
Illumination control

Unified meter control unit produces an illumination output of the
combination meter when the ignition switch is “ON”.

Light levels can be adjusted by pressing illumination control
switch of the combination meter when lighting switch is “ON”.

Illumination control switch has five light level settings.
NOTE:
When it is light outside, light level cannot be adjusted by turning
on the lighting switch.
UNIFIED METER AND A/C AMP.
Refer to DI-27, "System Description" in “UNIFIED METER AND A/C AMP”.
SKIB0769E

COMBINATION METERS
DI-5
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FA I L - S A F E
Solution When Communication Error Between the Unified Meter and A/C Amp. and the Com-
bination Meter
Function Specifications
SpeedometerReturn to zero when discontinuing communication or receiv-
ing irregular data.
Tachometer
Reset to zero by suspending communication.
Fuel gauge
Illumination control Combination meter illumination When suspending communication, change to nighttime mode.
Odo/trip meter Integrate in response to 8-pulse input.
Shift indicator The display turns off by suspending communication.
Warning buzzer The warning buzzer turns off by suspending communication.
Warning lamp/indicator lampLow water temperature indicator lamp
The lamp turns on by suspending communication. VDC OFF indicator (With VDC)
SLIP indicator (With VDC)
Brake warning lamp
ABS warning lamp
ASCD CRUISE indicator lamp
The lamp turns off by suspending communication. ASCD SET indicator lamp
Turn signal indicator lamp
High-beam indicator lamp
Front fog indicator lamp
Rear fog indicator lamp
Oil pressure warning lamp
Door warning lamp
High water temperature warning lamp
Malfunction indicator lamp
A/T CHECK warning lamp
CVT indicator lamp
KEY warning lamp
LOCK warning lamp

DI-6
COMBINATION METERS

HOW TO CHANGE THE DISPLAY FOR ODO/TRIP METER

The vehicle speed signal and the memory signals from the meter memory circuit are processed by the
combination meter and the mileage is displayed.

Depressing the odo/trip meter switch toggles the mode in the following order.

The odo/trip meter display mode toggling and trip display resetting can be identified by the amount of time
that elapses from pressing the odo/trip meter switch to releasing it.

When resetting with trip A displayed, only trip A display is reset (The same way for “trip B”).
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times

through 10A fuse [No. 19, located in the fuse block (J/B)]

to unified meter and A/C amp. terminal 21,

through 15A fuse [No. 17, located in the fuse block (J/B)]

to combination meter terminal 7.
With the ignition switch in the ACC or ON position, power is supplied

through 10A fuse [No. 6, located in the fuse block (J/B)]

to unified meter and A/C amp. terminal 35.
With the ignition switch in the ON or START position, power is supplied

through 10A fuse [No. 14, located in the fuse block (J/B)]

to combination meter terminal 8,

through 10A fuse [No. 12, located in the fuse block (J/B)]

to unified meter and A/C amp. terminal 22.
With the ignition switch in the ON position, power is supplied

through 15A fuse [No. 10, located in the fuse block (J/B)], and

through 15A fuse [No. 11, located in the fuse block (J/B)]

to unified meter and A/C amp. terminal 46.
Ground is supplied

to combination meter terminals 10, 11 and 12

through body grounds M71 and M72,

to unified meter and A/C amp. terminals 29 and 30

through body grounds M71 and M72.
SEL175W