RM38N0EC _52 Drivetrain _119335 GF1A TRANSFER / 4WD / AWD _0524142 DYNAMIC TORQUE CONTROL AWD SYSTEM C

GF1A TRANSFER / 4WD / AWD  DYNAMIC TORQUE CONTROL AWD SYSTEM  C1297  Steering Angle Sensor  


DESCRIPTION

The 4WD ECU assembly determines that the vehicle is turning based on the signals sent from the steering sensor.

The steering sensor signal is sent to the 4WD ECU assembly via CAN communication.

DTC No. Detection Item DTC Detection Condition Trouble Area
C1297 Steering Angle Sensor When voltage of 4WD ECU assembly IG terminal is 9.5 V or more, and steering sensor malfunction signal is received.
·

Electronically controlled brake system

·

Steering sensor

·

CAN communication system

·

4WD ECU assembly

·

Wire harness or connector

·

Stop and start system (Backup boost converter circuit)



WIRING DIAGRAM

C470155E03
3.875,2.927 5.969,3.281 2.094,0.354 10 false Steering Sensor 0.771,3.188 2.51,3.385 1.74,0.198 10 false : CAN Communication Line 2.49,1.875 3.667,2.094 1.177,0.219 10 false ECU-DCC NO. 1 3.99,0.99 4.313,1.188 0.323,0.198 10 false IG1 3.802,0.875 4,1.104 0.198,0.229 10 false 9 3.802,1.625 4.115,1.833 0.313,0.208 10 false 4 3.802,2.271 4.021,2.469 0.219,0.198 10 false 6 3.885,2.76 4.344,2.958 0.458,0.198 10 false E60 3.979,1.729 4.438,1.927 0.458,0.198 10 false BAT 3.969,2.375 4.427,2.573 0.458,0.198 10 false ESS 5.76,2.031 7.125,2.26 1.365,0.229 10 false 4WD ECU Assembly 1.042,0.979 2.188,1.375 1.146,0.396 10 false from Engine Stop and Start ECU 1.375,1.729 2.177,1.917 0.802,0.188 10 false from Battery

CAUTION / NOTICE / HINT

NOTICE:

Inspect the fuses for circuits related to this system before performing the following inspection procedure.


PROCEDURE

1.CHECK FOR DTC
a.

Clear the DTC.

Chassis > Four Wheel Drive > Clear DTCs
50002 118

b.

Turn the ignition switch off.


c.

Turn the ignition switch to ON again and check that no CAN communication system DTC(s) is output.

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for Gasoline Model)>DIAGNOSIS SYSTEM


d.

Start the engine.


e.

Drive the vehicle at a speed of 35 km/h (24 mph), turn the steering wheel to the right and left and check that no electronically controlled brake system DTC (steering sensor) is output.

Chassis > Brake/EPB > Trouble Codes
50001 435
Result:
Result Proceed to
Neither CAN communication system DTC nor electronically controlled brake system DTC is output A
CAN communication system DTC is output B
Electronically controlled brake system DTC (steering sensor) is output C


HINT:

When DTCs indicating a CAN communication system malfunction are output, repair the CAN communication system before repairing each corresponding sensor.




A

2.CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)

B

GO TO CAN COMMUNICATION SYSTEM (HOW TO PROCEED WITH TROUBLESHOOTING)

Click herePower Source / Network>NETWORKING>CAN COMMUNICATION SYSTEM (for Gasoline Model)>HOW TO PROCEED WITH TROUBLESHOOTING


C

REPAIR CIRCUIT INDICATED BY OUTPUT CODE (ELECTRONICALLY CONTROLLED BRAKE SYSTEM)

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>ELECTRONICALLY CONTROLLED BRAKE SYSTEM (for Gasoline Model)>DIAGNOSTIC TROUBLE CODE CHART


2.CHECK HARNESS AND CONNECTOR (POWER SOURCE TERMINAL)
a.

Remove the steering wheel assembly and the lower steering column cover sub-assembly.


b.

Make sure that there is no looseness at the locking part and the connecting part of the connectors.


c.
C445077C15
0.229,0.771 0.615,1.01 0.385,0.24 2,1.99 2.604,1.635 true 0.188,0.188 0.5,0.344 0.313,0.156 10 false *a 0.302,0.813 0.76,1.01 0.458,0.198 10 false E60 2.667,1.552 3.125,1.75 0.458,0.198 10 false BAT
*a Front view of wire harness connector
(to Steering Sensor)


Disconnect the E60 steering sensor connector.


d.

Measure the voltage according to the value(s) in the table below.

Standard Voltage:
Tester Connection Condition Specified Condition

Click Location & Routing(E60)Location & Routing

Click Connector(E60)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Steering Sensor

E60-4 (BAT) - Body ground Always 11 to 14 V



Result:
Proceed to
OK
NG



OK

3.CHECK TERMINAL VOLTAGE (IG1 TERMINAL)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

3.CHECK TERMINAL VOLTAGE (IG1 TERMINAL)
a.

Turn the ignition switch to ON.


b.
C445077C16
0.229,0.771 0.615,1.01 0.385,0.24 2.021,2.365 2.521,2.667 true 0.188,0.188 0.5,0.344 0.313,0.156 10 false *a 0.313,0.813 0.771,1.01 0.458,0.198 10 false E60 2.573,2.646 3.031,2.844 0.458,0.198 10 false IG1
*a Front view of wire harness connector
(to Steering Sensor)


Measure the voltage according to the value(s) in the table below.


Standard Voltage:
Tester Connection Condition Specified Condition

Click Location & Routing(E60)Location & Routing

Click Connector(E60)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Steering Sensor

E60-9 (IG1) - Body ground Ignition switch ON 10.5 to 16 V


Result:
Proceed to
OK
NG



OK

4.CHECK HARNESS AND CONNECTOR (ESS TERMINAL)

NG

INSPECT STOP AND START SYSTEM (BACKUP BOOST CONVERTER CIRCUIT)

Click hereEngine / Hybrid System>STOP AND START>STOP AND START SYSTEM>Backup Boost Converter Circuit


4.CHECK HARNESS AND CONNECTOR (ESS TERMINAL)
a.

Turn the ignition switch off.


b.

Measure the resistance according to the value(s) in the table below.

Standard Resistance:
Tester Connection Condition Specified Condition

Click Location & Routing(E60)Location & Routing

Click Connector(E60)Instrument Panel>Instrument Panel Wire / Telephone Computer Wire>Steering Sensor

E60-6 (ESS) - Body ground Always Below 1 Ω



Result:
Proceed to
OK
NG



OK

5.READ VALUE USING GTS (STEERING ANGLE VALUE)

NG

REPAIR OR REPLACE HARNESS OR CONNECTOR

5.READ VALUE USING GTS (STEERING ANGLE VALUE)
a.

Read the value displayed on the GTS.

Chassis > Four Wheel Drive > Data List
Tester Display Measurement Item Range Normal Condition Diagnostic Note
Steering Angle Value Steering angle value Min.: -3276.8°
Max.: 3276.7° 		Increase: Left turn
Decrease: Right turn 		Changes in proportion with the amount of steering wheel rotation during steering operation.
Chassis > Four Wheel Drive > Data List
Tester Display
Steering Angle Value
50003 118 8
OK:

The steering sensor value changes in accordance with the steering wheel movement.



Result:
Proceed to
OK
NG



OK

REPLACE 4WD ECU ASSEMBLY

Click hereDrivetrain>GF1A (TRANSFER / 4WD / AWD)>4WD CONTROL ECU>REMOVAL


NG

REPLACE STEERING SENSOR

Click hereBrake>BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS>STEERING ANGLE SENSOR>REMOVAL