Steering Column: Other Subaru BRZ ZC

Precautions

1. Precautions when checking diagnosis codes. As the steering lock actuator ASSY (Steering lock ECM) does not store past diagnostics, when diagnosis codes are output, do not turn the ignition to IG OFF or perform any deletions until diagnosis code checking and recording is completely finished.
2. Precautions when attaching/detaching the battery ground terminal or during a battery voltage drop. After attaching/detaching the battery ground terminal or when there is a drop in battery voltage, after the battery issue has been resolved you may not be able to release the steering lock or start the engine unless you first open and close the driver's door while the ignition is in the IG OFF state.
3. Precautions when replacing the steering lock actuator ASSY (Steering lock ECM). After replacing the steering lock actuator ASSY (Steering lock ECM), before starting the engine be sure to turn the steering mechanism to the left and right to confirm that the steering is not locked. If the steering is locked, perform the lock procedure and unlock it again. This will prevent the engine from being started while the steering lock is on.
4. Precautions when replacing the ECM. When replacing any of the following parts, please refer to the "Registration manual for immobilizer". Smart key computer ASSY (Collation ECM) Steering lock actuator ASSY (Steering lock ECM) Engine control computer Electrical key transmitter SUB-ASSY (Electronic key). ID code box (with the ID code box)

Scheme 89

Current Data Display & Save/Work Support

1. Data monitor NOTE: The SSM3 can be used to read the input to the steering lock actuator ASSY (Steering lock ECM), communication, and operating conditions. Use the SSM3 to judge whether a component is working or not, and to narrow down the location of trouble with the data monitor. SSM3 SCREEN: [EACH SYSTEM CHECK] -->[KEYLESS ACCESS SYSTEM] -->[POWER SUPPLY ECM]-->[CURRENT DATA DISPLAY & SAVE] Item name Description/display range Normal value Remarks [Shift lever P switch signal] (1) Shift position (P) state Display range: ON/OFF ON: In shift position P OFF: Not in shift position P Used for determining the presence of a shift switch (P) failure. [Steering unlock SW] Indicates the steering unlock sensor signal output from the steering lock actuator ASSY (Steering lock ECM). Display range: ON/OFF ON: Steering unlock OFF: Steering lock The steering will be locked when any door is opened (or closed) while the vehicle is set to IG OFF and the shifter is in the P position (Transmission A/T). The steering will be unlocked when the electrical key transmitter SUB-ASSY (Electronic key) is inside the vehicle and the vehicle is set to ACC ON or IG ON. The engine cannot be started when the steering unlock signal is OFF. [Steering lock unlock wait time-out] Steering lock unlock malfunction Display range: Yes/No Yes: Unlocking malfunction (For example: When the lock bar is stuck, etc.) No: Unlocking normal When the engine cannot be started due to a steering lock unlocking malfunction, "Yes" is displayed. (1) Transmission A/T. SSM3 SCREEN: [EACH SYSTEM CHECK] -->[KEYLESS ACCESS SYSTEM] -->[COLLATION ECM] -->[CURRENT DATA DISPLAY & SAVE] Item name Description/display range Normal value Remarks [Ignition] Indicates the IG power supply input state of the smart key computer ASSY (Collation ECM). Display range: ON/OFF ON: IG ON OFF: IG OFF When it is in the ACC ON state, "OFF" is displayed. [Immobilizer] Indicates the state of the engine immobilizer system determined by the smart key computer ASSY (Collation ECM). Display range: Unset/Set Unset: Engine immobilizer unset (engine start possible) state. Set: Engine immobilizer set (engine start prohibited) state. The engine cannot be started when this item displays "Set". NOTE: The security indicator light blink when this item is "Set". The security indicator light is linked to the immobilizer set and unset state. This is unrelated to the steering lock/unlock states. [Sleep possible status] Indicates the steering lock ECM sleep permission state. Display range: Yes/No Yes: Sleep permitted No: Sleep not permitted - [Wake-up transmission status] Indicates the steering lock ECM wake-up signal communication state. Display range: Yes/No Yes: Wake-up signal transmission No: No wake-up signal transmission - [Lock confirmation] Indicates the lock confirmation state of the steering lock actuator ASSY (Steering lock ECM). Display range: Set/Unset Set: Lock confirmed UnSet: Lock not confirmed "The steering is not locked when "Unset" is displayed." [Unlock confirmation] Indicates the unlock confirmation state of the steering lock actuator ASSY (Steering lock ECM). Display range: Set/Unset Set: Unlock confirmed Unset: Unlock not confirmed "The steering is not unlocked when "Unset" is displayed." (The engine cannot be started.) [Motor operation prohibition voltage evaluation] Indicates the state of the engine start permission signal sent to the smart key computer ASSY (Collation ECM) after judgment by the steering actuator ASSY (Steering lock ECM). Display range: OK/NG OK: Engine start permitted NG: Engine start prohibited When this item displays "OK", the smart key computer ASSY (Collation ECM) receives an unlock confirmation signal from the steering lock actuator ASSY (Steering lock ECM) and sends the engine start permission signal. The engine cannot be started when this item displays "NG". [Sensor abnormal (past)] Indicates any history of steering lock actuator ASSY (Steering lock ECM) internal position sensor malfunction. Display range: NG/OK NG: There is a history of the steering lock actuator ASSY (Steering lock ECM) internal lock/unlock sensors both being in an ON state at the same time (usually they are not both ON). OK: There is no history of steering lock actuator ASSY (Steering lock ECM) internal lock/unlock sensor malfunction. When this item displays "NG", there may be a steering lock actuator ASSY internal position sensor malfunction, or mechanical fault. [Motor power supply short-circuit abnormal (past)] Indicates the malfunction (short circuit) history for the signal sent to the steering lock actuator ASSY (Steering lock ECM) signal from the smart key computer ASSY (Collation ECM). Display range: NG/OK NG: Motor power supply short circuit history present OK: No motor power supply short circuit history This item indicates the history of when there is a circuit malfunction between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). [Motor driver short-circuit abnormal (past)] Indicates any history of steering lock actuator ASSY (Steering lock ECM) internal motor drive circuit malfunctions (short circuit). (Diagnostic code B2781 is output) Display range: NG/OK NG: Motor driver short circuit history present OK: No motor driver short circuit history present This item identifies any malfunction in the steering lock actuator ASSY (Steering lock ECM) internal steering lock motor drive circuit. [Steering lock lock/unlock request reception history] Indicates the unlock request signal reception history. Display range: NG(Past)/OK Yes: Unlock request signal reception history present No: No unlock request signal reception history - [Lock bar engagement abnormal] Indicates the history of not being able to correctly unlock the steering after the steering lock bar is moved to the unlock position for a certain period of time. Display range: NG(Past)/OK NG(Past): History of the lock bar being stuck OK: No history of the lock bar being stuck - [Push start abnormal (past)] Indicates any history of a push button start malfunction caused by the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK NG: Push button start malfunction history present OK: No push button start malfunction history - [EEPROM access abnormal] Indicates the steering lock ECM state. Display range: NG/OK NG: Steering lock ECM malfunction OK: Steering lock ECM normal - [Engine start permission request reception status] Indicates the reception state of the engine start permission signal sent to the smart key computer ASSY (Collation ECM) after judgment by the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK NG: When it is not yet received OK: When it has already been received When "OK" is displayed, the smart key computer ASSY (Collation ECM) receives an unlock confirmation signal from the steering lock actuator ASSY (Steering lock ECM), allowing engine fuel injection and ignition. The engine cannot be started when this item displays "NG". [L Code Check] Indicates the collation results between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK NG: Collation results abnormal OK: Collation results normal The smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM) are unable to perform L code registration. Steering lock cannot be performed. Steering unlock cannot be performed. (The engine cannot be started.) [Steering lock lock/unlock command reception history] Indicates the unlock request signal reception state. Display range: NG(Past)/OK NG(Past): IG ON, ACC ON or engine start operation not performed OK: Within 10 seconds after IG ON, ACC ON or engine start operation The engine cannot be started when the unlock request signal cannot be received. If "OK" is not displayed even if the steering unlock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction. [Steering lock request reception status] Indicates the lock request signal reception state. Display range: OK/NG(Past) OK: When a lock request is received within 10 seconds after any one of the doors is opened while the shifter is in the P position (Transmission A/T) and the vehicle ignition is turned to IG OFF. NG(Past): Other than the above If "OK" is not displayed even if the steering lock conditions are satisfied, there may be a smart key computer ASSY (Collation ECM) malfunction. [L Code Check(Past)] Indicates the collation results history from between the smart key computer ASSY (Collation ECM) and the steering lock actuator ASSY (Steering lock ECM). Display range: NG/OK NG: There is a history of a abnormal collation results OK: There is no history of a abnormal collation results - [Number of Diagnostic Code(s):] Indicates the number of diagnostic codes. Display range: 0 - 255 items

Scheme 90

1. When the following conditions are satisfied, the steering lock will be unlocked. The vehicle is set to ACC ON or IGN ON. When the push button start switch is operated and the vehicle is set to ACC ON or IG ON, the electrical key transmitter SUB-ASSY (Electronic key) and the smart key computer ASSY (Collation ECM) are matched and the steering will be unlocked. The electrical key transmitter SUB-ASSY (Electronic key) will be checked if any of the following conditions are met. The brake pedal (Transmission A/T) or the clutch pedal (Transmission M/T) are depressed and the engine is started. Within 30 seconds after a door has been opened and closed. The push button start switch is pressed. NOTE: Key collation: When there is a match between the code transmitted by the electrical key transmitter SUB-ASSY (Electronic key) and the code calculated by the smart key computer ASSY (Collation ECM). A genuine collation ECM is confirmed: Checking of the L code issued when the engine is started or the push button start switch is pressed. The steering lock actuator ASSY (Steering lock ECM) uses L codes to check whether the smart key computer ASSY (Collation ECM) is a genuine ECM.
2. If the following conditions are satisfied, the steering will be locked when the smart key computer ASSY (Collation ECM) has been confirmed to be a genuine ECM. The vehicle is stopped. No vehicle speed signal abnormal. The vehicle is set to IG OFF and ACC OFF. The shifter is in the P position (Transmission A/T). A door changes from closed -->open, or a door is locked (smart door lock, wireless door lock). NOTE: The following example, indicates the data monitor activity when the vehicle changes from ACC ON -->IG ON -->IG OFF while the shifter is in the P position (Transmission A/T) and the brake pedal (Transmission A/T) or the clutch pedal (Transmission M/T) are not depressed. NOTE: Enter the vehicle while carrying the electrical key transmitter SUB-ASSY (Electronic key), set the ignition to IG OFF and put the shifter in the P position (Transmission A/T), and perform the following operations to check each data monitor activity.

*1: Without depressing the brake pedal (Transmission A/T) or the clutch pedal (Transmission M/T), press the push button start switch and confirm that it changes over to ACC ON.

*2: Without depressing the brake pedal (Transmission A/T) or the clutch pedal (Transmission M/T), press the push button start switch and confirm that it changes over to IG ON.

*3: Press the push button start switch and confirm that it changes over to IG OFF.

*4: Open the door. (Steering lock complete)

SSM3 SCREEN: [EACH SYSTEM CHECK] -->[INTEG. UNIT MODE] -->[CURRENT DATA DISPLAY & SAVE]

1. SRS airbag system handling and precautions for operation. CAUTION: As this maintenance procedure may have an effect on the SRS airbag system, be sure to check the SRS airbag system precautions before commencing work. (Refer to «SRS AIRBAG SYSTEM»(ref-619160-S11196911262014053000000) )
2. Correct handling and precautions for operation. Handling of the steering computer ASSY. Do not apply any impact to the steering column ASSY (particularly the motor and torque sensor parts). Be sure to replace with a new part if strong impact is applied (such as hitting or dropping the part). Do not pull on the steering column ASSY wiring harness. Do not release the tilt lever while the steering column ASSY is removed from the vehicle. After replacing the steering column ASSY, perform torque sensor zero point calibration and rotation angle sensor output calibration. (Refer to «WORK SUPPORT»(ref-619152-S38082779532014053000000) ) Precautions when connecting or disconnecting connectors. Before you disconnect any connectors related to the electric power steering system, turn the ignition to IG ON and set the steering to the straight-ahead position. Disconnect the connector after turning the ignition to IG OFF. Before you connect any connectors related to the electric power steering system, confirm that the ignition is turned to IG OFF, connect the connector and turn the ignition to IG ON while the steering is in the straight-ahead position. CAUTION: Do not turn the ignition to IG ON if the steering is not in the straight-ahead position. Steering roll connector precautions. Do not install/remove the steering roll connector SUB-ASSY while the ignition is set to IG ON or the battery ground terminal is connected. Do not rotate the steering roll connector SUB-ASSY without the steering wheel ASSY attached while the ignition is set to IG ON and the battery ground terminal is connected. When attaching the steering roll connector SUB-ASSY and steering wheel ASSY, be sure to carry out steering roll connector SUB-ASSY centering. (Refer to «INSPECTION»(ref-619161-S05193861552014053000000) ) CAUTION: If centering is not carried out, the steering roll connector SUB-ASSY may become disconnected upon operation of the steering wheel ASSY.

On-Vehicle Inspection

1. Check steering wheel play. Start the engine and place the vehicle in a state where power steering can operate. Place the vehicle in the straight-ahead position. Lightly move the steering wheel ASSY with your fingers to check for play. Limit: Within 30 mm {1.18 in} NOTE: If it exceeds this limit, refer to the symptom table and check each appropriate part. (Refer to «SYMPTOM TABLE»(ref-619170-S30374674922014053000000) )