3.
Has a problem been found?
YES
a.
Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
a.
Go to " Steering angle Neutral Signal Inspection " procedure.
Many malfunctions in the electrical system are caused by poor harness and terminals. Faults can also be caused by interference from other electrical systems, and mechanical or chemical damage.
Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration,or damage.
Has a problem been found?
YES
Repair as necessary and go to "Verification of Vehicle Repair" procedure
NO
Go to " Steering angle Neutral Signal Inspection " procedure.
Engine "ON".
Connect TCCU, Steering angle sensor connector.
Monitor signal waveform between terminal 1 of Steering angle sensor harness connector M14 and chassis ground.
Turn steering Wheel to the right or left.
Specification : Signal Waveform & Data
The above value is only for reference. The actual value may differ from it according to various engine condition.
Is Steering angle Neutral Signal display near the specified value?
YES
Fault is intermittent caused by poor contact in the sensor’s and/or TCCU’s connector or was repaired and TCCU memory was not cleared.Thoroughly check connectors for looseness, poor connection, bending, corrosion, contamination, deterioration, or damage. Repair or replace as necessary and then go to "Verification of Vehicle Repair" procedure.
NO
Go to " Steering angle sensor Reference voltage inspection " procedure.
Ignition "ON",Engine "OFF".
TCCU, Steering angle sensor connector : Connect.
Measure voltage between terminal 2 of Steering angle sensor harness connector M14 and chassis ground .
Specification : Approx. 12V
The above value is only for reference. The actual value may differ from it according to various engine condition.
Is voltage display near the specified value?
YES
Go to " Steering angle sensor ground harness open circuit inspection " procedure.
NO
Check for Steering angle sensor Reference harness.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
Ignition OFF
TCCU, Steering angle sensor connector : Connect.
Measure resistance between terminal 3 of Steering angle sensor harness connector M14 and chassis ground .
Specification : Approx. 1Ω below.
The above value is only for reference. The actual value may differ from it according to various engine condition.
Is resistance display near the specified value?
YES
Go to " Steering angle Neutral Signal ,short to signal line ground Inspection " procedure.
NO
Check for open circuit of Steering angle sensor ground harness.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
Ignition OFF
TCCU, Steering angle sensor connector : Disconnect.
Measure resistance between terminal 1 of Steering angle sensor harness connector M14 and chassis ground .
Specification : Approx. ∞ Ω
The above value is just for reference. The actual value may differ from it according to various engine condition.
Is resistance display near the specified value?
YES
Go to " Steering angle Neutral Signal open Inspection " procedure.
NO
Check for ground to short circuit of Steering angle Neutral Signal circuit.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
Ignition OFF
TCCU, Steering angle sensor connector : Disconnect.
Measure resistance between terminal 1 of Steering angle sensor harness connector M14 and terminal 11 of TCCU harness connector C258 .
Specification : Approx. 0 Ω
The above value is only for reference. The actual value may differ from it according to various engine condition.
Is resistance display near the specified value?
YES
Substitute with a known-good TCCU or Steering angle sensor and check for proper operation.
If the problem is corrected, replace TCCU and then go to "Verification of Vehicle Repair" procedure.
NO
Check for open circuit of Steering angle sensor Neutral Signal circuit.
Repair as necessary and then go to "Verification of Vehicle Repair" procedure.
