ignition NISSAN TEANA 2003 Service Manual

LAN-74
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AFS Control Unit Branch Line CircuitBKS002E7
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the AFS control unit for damage, bend and loose connection (unit
side and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of AFS control unit.
2. Check the resistance between the AFS control unit harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the AFS control unit branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the AFS control unit. Refer to LT- 7 9 , "
Wiring Diagram —
AFS —" .
OK or NG
OK >>
Present error: Replace the AFS control unit. Refer to LT- 9 4 , "REMOVAL" .

Past error: Error was detected in the AFS control unit branch line.
NG >> Repair the power supply and the ground circuit.
BCM Branch Line CircuitBKS002E8
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the BCM for damage, bend and loose connection (unit side and
connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
AFS control unit harness connector
Resistance (Ω)
Connector No. Terminal No.
M93 2 5 Approx. 54 – 66

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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of BCM.
2. Check the resistance between the BCM harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the BCM branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the BCM. Refer to BCS-11, "
Schematic" .
OK or NG
OK >>
Present error: Replace the BCM. Refer to BCS-16, "Removal and Installation of BCM" .

Past error: Error was detected in the BCM branch line.
NG >> Repair the power supply and the ground circuit.
Data Link Connector Branch Line CircuitBKS002E9
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of data link connector for damage, bend and loose connection (con-
nector side and harness side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
Check the resistance between the data link connector terminals.
OK or NG
OK >>
Present error: Check the following items again.
–Decision of CAN system type.
–Not received CONSULT-II data (SELECT SYSTEM, SELF-DIAG RESULTS, CAN DIAG SUP-
PORT MNTR).
–Procedure for detecting root cause.

Past error: Error was detected in the data link connector branch line circuit.
NG >> Repair the data link connector branch line.
BCM harness connector
Resistance (Ω)
Connector No. Terminal No.
M3 39 40 Approx. 54 – 66
Data link connector
Resistance (Ω)
Connector No. Terminal No.
M32 6 14 Approx. 54 – 66

LAN-76
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TROUBLE DIAGNOSIS

Intelligent Key Unit Branch Line CircuitBKS002EB
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the Intelligent Key unit for damage, bend and loose connection
(unit side and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of Intelligent Key unit.
2. Check the resistance between the Intelligent Key unit harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the Intelligent Key unit branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the Intelligent Key unit. Refer to BL-78, "
Schematic" .
OK or NG
OK >>
Present error: Replace the Intelligent Key unit. Refer to BL-117, "Removal and Installation of
Intelligent Key Unit" .

Past error: Error was detected in the Intelligent Key unit branch line.
NG >> Repair the power supply and the ground circuit.
Unified Meter and A/C Amp. Branch Line CircuitBKS002EC
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the unified meter and A/C amp. for damage, bend and loose con-
nection (unit side and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
Intelligent Key unit harness connector
Resistance (Ω)
Connector No. Terminal No.
M31 2 3 Approx. 54 – 66

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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of unified meter and A/C amp.
2. Check the resistance between the unified meter and A/C amp. harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the unified meter and A/C amp. branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the unified meter and A/C amp. Refer to DI-28, "
Schematic" .
OK or NG
OK >>
Present error: Replace the unified meter and A/C amp. Refer to DI-34, "Removal and Installa-
tion of Unified Meter and A/C Amp." .

Past error: Error was detected in the unified meter and A/C amp. branch line.
NG >> Repair the power supply and the ground circuit.
Steering Angle Sensor Branch Line CircuitBKS002ED
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the steering angle sensor for damage, bend and loose connection
(unit side and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of steering angle sensor.
2. Check the resistance between the steering angle sensor harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the steering angle sensor branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the steering angle sensor. Refer to BRC-48, "
Schematic"
(Models with VDC), LT- 7 9 , "Wiring Diagram — AFS —" (Models with AFS).
OK or NG
OK >>
Present error: Replace the steering angle sensor. Refer to BRC-91, "Removal and Installation"
(Models with VDC), LT- 9 4 , "REMOVAL" (Models with AFS).

Past error: Error was detected in the steering angle sensor branch line.
NG >> Repair the power supply and the ground circuit.
Unified meter and A/C amp. harness connector
Resistance (Ω)
Connector No. Terminal No.
M41 1 11 Approx. 54 – 66
Steering angle sensor harness connector
Resistance (Ω)
Connector No. Terminal No.
M26 4 5 Approx. 54 – 66

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Display Control Unit Branch Line CircuitBKS002ET
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the display control unit for damage, bend and loose connection
(unit side and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of display control unit.
2. Check the resistance between the display control unit harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the display control unit branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply, ignition signal and the ground circuit of the display control unit. Refer to AV- 6 4 ,
"Schematic — INF/D —" .
OK or NG
OK >>
Present error: Replace the display control unit. Refer to AV- 11 2 , "Removal and Installation of
Display Control Unit" .

Past error: Error was detected in the display control unit branch line.
NG >> Repair the power supply and the ground circuit.
Display Unit Branch Line CircuitBKS002ES
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the display unit for damage, bend and loose connection (unit side
and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
Display control unit harness connector
Resistance (Ω)
Connector No. Terminal No.
M83 25 26 Approx. 54 – 66

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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of display unit.
2. Check the resistance between the display unit harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the display unit branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply, ignition signal and the ground circuit of the display unit. Refer to AV- 4 2 , "
Schematic" .
OK or NG
OK >>
Present error: Replace the display unit. Refer to AV- 6 0 , "Removal and Installation of Display
Unit" .

Past error: Error was detected in the display unit branch line.
NG >> Repair the power supply and the ground circuit.
TCM Branch Line Circuit (Models with A/T)BKS002EG
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).
–TCM
–Harness connector M55
–Harness connector F102
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of TCM.
2. Check the resistance between the TCM harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the TCM branch line.
Display unit harness connector
Resistance (Ω)
Connector No. Terminal No.
M47 14 16 Approx. 54 – 66
TCM harness connector
Resistance (Ω)
Connector No. Terminal No.
F104 5 6 Approx. 54 – 66

LAN-80
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3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the TCM. Refer to AT- 4 2 , "
Circuit Diagram" .
OK or NG
OK >>
Present error: Replace the TCM. Refer to AT- 4 1 , "A/T Electrical Parts Location" .

Past error: Error was detected in the TCM branch line.
NG >> Repair the power supply and the ground circuit.
TCM Branch Line Circuit (Models with CVT)BKS002EH
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).
–TCM
–Harness connector M55
–Harness connector F102
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of TCM.
2. Check the resistance between the TCM harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the TCM branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the TCM. Refer to CVT-31, "
Circuit Diagram" .
OK or NG
OK >>
Present error: Replace the TCM. Refer to CVT-30, "CVT Electrical Parts Location" .

Past error: Error was detected in the TCM branch line.
NG >> Repair the power supply and the ground circuit.
ABS Actuator and Electric Unit (Control Unit) Branch Line CircuitBKS002EU
INSPECTION PROCEDURE
1. CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the ABS actuator and electric unit (control unit) for damage, bend
and loose connection (unit side and connector side).
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
TCM harness connector
Resistance (Ω)
Connector No. Terminal No.
F106 5 6 Approx. 54 – 66

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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of ABS actuator and electric unit (control unit).
2. Check the resistance between the ABS actuator and electric unit (control unit) harness connector termi-
nals.
Models with ABS
Models with VDC
OK or NG
OK >> GO TO 3.
NG >> Repair the ABS actuator and electric unit (control unit) branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the ABS actuator and electric unit (control unit). Refer to
BRC-12, "
Schematic" (Models with ABS), BRC-48, "Schematic" (Models with VDC).
OK or NG
OK >>
Present error: Replace the ABS actuator and electric unit (control unit). Refer to BRC-35,
"Removal and Installation" (Models with ABS), BRC-88, "Removal and Installation" (Models
with VDC).

Past error: Error was detected in the ABS actuator and electric unit (control unit) branch line.
NG >> Repair the power supply and the ground circuit.
IPDM E/R Branch Line CircuitBKS002EI
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).
–IPDM E/R
–Harness connector E253
–Harness connector E11
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
ABS actuator and electric unit (control unit) harness connector
Resistance (Ω)
Connector No. Terminal No.
E240 22 9 Approx. 54 – 66
ABS actuator and electric unit (control unit) harness connector
Resistance (Ω)
Connector No. Terminal No.
E241 7 9 Approx. 54 – 66

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2. CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of IPDM E/R.
2. Check the resistance between the IPDM E/R harness connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Repair the IPDM E/R branch line.
3. CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the IPDM E/R. Refer to PG-24, "
Schematic" .
OK or NG
OK >>
Present error: Replace the IPDM E/R. Refer to PG-28, "Removal and Installation of IPDM E/R"
.

Past error: Error was detected in the IPDM E/R branch line.
NG >> Repair the power supply and the ground circuit.
CAN Communication CircuitBKS002EJ
INSPECTION PROCEDURE
1. CONNECTOR INSPECTION
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect all the unit connectors on CAN communication system.
4. Check terminals and connectors for damage, bend and loose connection.
OK or NG
OK >> GO TO 2.
NG >> Repair the terminal and connector.
2. CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector terminals.
OK or NG
OK >> GO TO 3.
NG >> Check the harness and repair the root cause.
3. CHECK HARNESS CONTINUITY (SHORT CIRCUIT)
Check the continuity between the data link connector and the ground.
OK or NG
OK >> GO TO 4.
NG >> Check the harness and repair the root cause.
IPDM E/R harness connector
Resistance (Ω)
Connector No. Terminal No.
E9 48 49 Approx. 108 – 132
Data link connector
Continuity
Connector No. Terminal No.
M32 6 14 No
Data link connector
GroundContinuity
Connector No. Terminal No.
M326No
14 No

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4. CHECK ECM AND IPDM E/R TERMINATION CIRCUIT
1. Remove the ECM and the IPDM E/R.
2. Check the resistance between the ECM terminals.
3. Check the resistance between the IPDM E/R terminals.
OK or NG
OK >> GO TO 5.
NG >> Replace the ECM or the IPDM E/R.
5. CHECK SYMPTOM
Connect all the connectors. Check if the symptoms described in the “Symptom (Results from interview with
customer)” are reproduced.
Inspection result
Reproduced>>GO TO 6.
Non-reproduced>>Start the diagnosis again. Follow the trouble diagnosis procedure when past error is
detected.
6. CHECK UNIT REPRODUCTION
Perform the reproduction test as per the following procedure for each unit.
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Disconnect one of the unit connectors of CAN communication system.
NOTE:
ECM and IPDM E/R have a termination circuit. Check other units first.
4. Connect the battery cable to the negative terminal. Check if the symptoms described in the “Symptom
(Results of interview with customer)” are reproduced.
NOTE:
Although unit-related error symptoms occur, do not confuse them with other symptoms.
Inspection result
Reproduced>>Connect the connector. Check other units as per the above procedure.
Non-reproduced>>Replace unit whose connector was disconnected.
ECM
Resistance (Ω)
Terminal No.
94 86 Approx. 108 – 132
IPDM E/R
Resistance (Ω)
Terminal No.
48 49 Approx. 108 – 132
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