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Steering Lock (Diagnostic Codes & Symptom Tests): Diagnosis Lexus RX III

Steering Column 7 illustrations ~3621 words

INSPECTION PROCEDURE

Note. If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start. After replacing the steering lock ECU (steering lock actuator assembly), perform the key ID code registration. Refer to REGISTRATION .

HINT

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

Note. If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start. After replacing the steering lock ECU (steering lock actuator assembly), perform the key ID code registration. Refer to REGISTRATION .

HINT

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

Note. If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start. After replacing the steering lock ECU (steering lock actuator assembly), perform the key ID code registration. Refer to REGISTRATION .

HINT

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

Scheme 88

Scheme 88: PROCEDURE
Scheme 88: PROCEDURE

Scheme 89

Scheme 89
Scheme 89

Scheme 90

Scheme 90
Scheme 90
  1. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Disconnect the F37 steering lock ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F37-1 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Steering Lock ECU) Reconnect the F37 steering lock ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F37-3 (IGE) - F37-1 (GND) Specified condition is checked after performing the following: Turn the engine switch off Turn the engine switch on (ACC or IG) Motor activated: Below 1 V Motor not activated: 10 to 12 V F37-3 (IGE) - F37-1 (GND) Specified condition is checked after performing the following: Move the shift lever to P Turn the engine switch off Open the driver door Motor activated: Below 1 V Motor not activated: 10 to 14 V TEXT IN ILLUSTRATION *1 Component with harness connected (Steering Lock ECU) HINT: When the steering lock is activated and the engine switch is turned on (IG), the steering lock motor activates to release the steering lock. The motor operation occurs for 2 to 15 seconds. NG --> See step 4 OK: Go to next step
  2. CLEAR DTC Clear the DTC. Refer to «DTC CHECK / CLEAR»(ref-400876-S22068277542011051800000) . Disconnect and reconnect the cable to the negative (-) battery terminal to clear the malfunction history of Power Supply Open. NEXT: Go to next step
  3. READ VALUE USING TECHSTREAM (POWER SUPPLY OPEN) Check for DTCs. Refer to «DTC CHECK / CLEAR»(ref-400876-S22068277542011051800000) . Use the Data List to check if the steering lock control is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note Power Supply Open Open in ECU record/ NG (Past) or OK NG (Past): Open in ECU OK: No malfunction - RESULT Result Proceed to B2782 is not output. "OK" is displayed on the Techstream. A B2782 is output. "NG (Past)" is displayed on the Techstream. B B --> See step 5 A --> See step 6
  4. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - POWER MANAGEMENT CONTROL ECU AND BODY GROUND) Disconnect the F8 power management control ECU connector. Disconnect the F37 steering lock ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F37-3 (IGE) - F8-8 (SLR+) Always Below 1 ohms F37-3 (IGE) or F8-8 (SLR+) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Rear view of wire harness connector (to Power Management Control ECU) *2 Front view of wire harness connector (to Steering Lock ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 7
  5. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY). Refer to «DISASSEMBLY»(ref-400650-S01240327472011051800000)
  6. USE SIMULATION METHOD TO CHECK. Refer to «GENERAL INFORMATION»(ref-400649-S41373024542011051800000)
  7. REPLACE POWER MANAGEMENT CONTROL ECU. Refer to «REMOVAL»(ref-400866-S34409136982011051800000)

Note. If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start. After replacing the steering lock ECU (steering lock actuator assembly), perform the key ID code registration. Refer to REGISTRATION .

HINT

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

Note. If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start. After replacing the steering lock ECU (steering lock actuator assembly), perform the key ID code registration. Refer to REGISTRATION . Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

Scheme 91

Scheme 91
Scheme 91
  1. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND) Disconnect the F37 connector from the steering lock ECU. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F37-1 (GND) - Body ground Always Below 1 ohms TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Steering Lock ECU) Reconnect the F37 steering lock ECU connector. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Switch Condition Specified Condition F37-6 (IG2) - F37-1 (GND) Engine switch on (IG) 11 to 14 V F37-6 (IG2) - F37-1 (GND) Engine switch off Below 1 V TEXT IN ILLUSTRATION *1 Component with harness connected (Steering Lock ECU) NG --> CHECK FOR SHORT IN ALL HARNESSES OR CONNECTORS CONNECTED TO IG2 FUSE AND REPLACE IGN FUSE OK --> See step 2
  2. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY). Refer to «DISASSEMBLY»(ref-400650-S01240327472011051800000)

Note. If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start. After replacing the steering lock ECU (steering lock actuator assembly), ID code box (immobiliser Code ECU) or certification ECU (smart key ECU assembly), perform the key ID code registration. Refer to REGISTRATION . Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

Scheme 92

Scheme 92: PROCEDURE
Scheme 92: PROCEDURE

Scheme 93

Scheme 93
Scheme 93
  1. CHECK SWITCH CONDITION Check the power source mode change. When the key is inside the vehicle and the shift lever is in P, check that pressing the engine switch causes the power source mode to change as follows: OK off --> on (ACC) --> on (IG) --> off HINT: Do not depress the brake pedal. NG --> See step 13 OK: Go to next step
  2. READ VALUE USING TECHSTREAM (LOCK/UNLOCK RECEIVE) Use the Data List to check if the steering lock command is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note Lock/Unlock Receive Steering lock command reception record/ Yes or No Yes: Steering lock/unlock signal received No: Steering lock/unlock signal not received - OK The certification ECU (smart key ECU assembly) receives an unlock request signal within 10 seconds of starting the engine, and "Yes" is displayed on the Techstream screen. NG --> See step 5 OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - BODY GROUND) Disconnect the F37 steering lock ECU connector. Measure the voltage and resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F37-1 (GND) - Body ground Always Below 1 ohms Standard Voltage Tester Connection Condition Specified Condition F37-7 (B) - Body ground Always 11 to 14 V TEXT IN ILLUSTRATION *1 Front view of wire harness connector (to Steering Lock ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  4. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Move the shift lever to P. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F37-3 (IGE) - F37-1 (GND) Steering lock motor operating immediately after turning the engine switch from off to on (IG) Below 1 V F37-3 (IGE) - F37-1 (GND) Steering lock motor not operating 11 to 14 V TEXT IN ILLUSTRATION *1 Component with harness connected (Steering Lock ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 14
  5. READ VALUE USING TECHSTREAM (S CODE) Use the Data List to check if the S code certification is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check S code certification result/ NG or OK NG: S code certification result abnormal OK: S code certification result normal - OK "OK" is displayed on the Techstream. NG --> See step 9 OK: Go to next step
  6. READ VALUE USING TECHSTREAM (L CODE) Use the Data List to check if the L code certification is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check L code certification result/ NG or OK NG: L code certification result abnormal OK: L code certification result normal - OK "OK" is displayed on the Techstream. NG --> See step 11 OK: Go to next step
  7. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Replace the steering lock ECU (steering lock actuator assembly). Refer to «DISASSEMBLY»(ref-400650-S01240327472011051800000) . NEXT: Go to next step
  8. CHECK STEERING LOCK RELEASED BY USUAL IGNITION Turn the engine switch on (IG). Operate the steering wheel and check the steering lock condition. OK Steering lock is released. NG --> See step 15 OK --> END (STEERING LOCK ECU WAS DEFECTIVE)
  9. REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Replace the ID code box (immobiliser code ECU). Refer to «REMOVAL»(ref-400879-S18384846842011051800000) . NEXT: Go to next step
  10. READ VALUE USING TECHSTREAM (S CODE) Use the Data List to check if the S code certification is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check S code certification result/ NG or OK NG: S code certification result abnormal OK: S code certification result normal - OK "OK" is displayed on the Techstream. NG --> See step 15 OK --> END (ID CODE BOX WAS DEFECTIVE)
  11. REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Replace the ID code box (immobiliser code ECU). Refer to «REMOVAL»(ref-400879-S18384846842011051800000) . NEXT: Go to next step
  12. READ VALUE USING TECHSTREAM (L CODE) Use the Data List to check if the L code certification is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check L code certification result/ NG or OK NG: L code certification result abnormal OK: L code certification result normal - OK "OK" is displayed on the Techstream. NG --> See step 15 OK --> END (ID CODE BOX WAS DEFECTIVE)
  13. GO TO SMART ACCESS SYSTEM WITH PUSH-BUTTON START (FOR START FUNCTION). Refer to «HOW TO PROCEED WITH TROUBLESHOOTING»(ref-400655-S07935767892011051800000)
  14. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY). Refer to «DISASSEMBLY»(ref-400650-S01240327472011051800000)
  15. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-400879-S13103807332011051800000)

Note. If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start. After replacing the steering lock ECU (steering lock actuator assembly), ID code box (immobiliser Code ECU) or certification ECU (smart key ECU assembly), perform the key ID code registration. Refer to REGISTRATION . Inspect the fuses for circuits related to this system before performing the following inspection procedure.

HINT

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

Note. If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start. After replacing the steering lock ECU (steering lock actuator assembly), ID code box (immobiliser Code ECU) or certification ECU (smart key ECU assembly), perform the key ID code registration. Refer to REGISTRATION .

HINT

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

Scheme 94

Scheme 94
Scheme 94
  1. READ VALUE USING TECHSTREAM (LOCK/UNLOCK RECEIVE) Use the Data List to check if the steering lock command is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note Lock/Unlock Receive Steering lock command reception record/ Yes or No Yes: Steering lock/unlock signal received No: Steering lock/unlock signal not received - OK The certification ECU (smart key ECU assembly) receives an unlock request signal within 10 seconds of starting the engine, and "Yes" is displayed on the Techstream screen. NG --> See step 4 OK: Go to next step
  2. INSPECT STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Move the shift lever to P. Measure the voltage according to the value(s) in the table below. Standard Voltage Tester Connection Condition Specified Condition F37-3 (IGE) - F37-1 (GND) Steering lock motor operating immediately after turning the engine switch from off to on (IG) Below 1 V F37-3 (IGE) - F37-1 (GND) Steering lock motor not operating 11 to 14 V TEXT IN ILLUSTRATION *1 Component with harness connected (Steering Lock ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step
  3. CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - POWER MANAGEMENT CONTROL ECU) Disconnect the F8 power management control ECU connector. Disconnect the F37 steering lock ECU connector. Measure the resistance according to the value(s) in the table below. Standard Resistance Tester Connection Condition Specified Condition F37-3 (IGE) - F8-8 (SLR+) Always Below 1 ohms F37-3 (IGE) or F8-8 (SLR+) - Body ground Always 10 kohms or higher TEXT IN ILLUSTRATION *1 Rear view of wire harness connector (to Power Management Control ECU) *2 Front view of wire harness connector (to Steering Lock ECU) NG --> REPAIR OR REPLACE HARNESS OR CONNECTOR OK --> See step 13
  4. READ VALUE USING TECHSTREAM (FL DOOR COURTESY SW) Use the Data List to check if the front door courtesy switch LH is functioning properly. Main Body Tester Display Measurement Item/Range Normal Condition Diagnostic Note FL Door Courtesy SW Front door courtesy switch LH/ ON or OFF ON: Front door courtesy switch LH ON OFF: Front door courtesy switch LH OFF - OK Front door courtesy switch LH is functioning properly. NG --> See step 14 OK: Go to next step
  5. READ VALUE USING TECHSTREAM (S CODE) Use the Data List to check if the S code certification is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check S code certification result/ NG or OK NG: S code certification result abnormal OK: S code certification result normal - OK "OK" is displayed on the Techstream. NG --> See step 9 OK: Go to next step
  6. READ VALUE USING TECHSTREAM (L CODE) Use the Data List to check if the L code certification is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check L code certification result/ NG or OK NG: L code certification result abnormal OK: L code certification result normal - OK "OK" is displayed on the Techstream. NG --> See step 11 OK: Go to next step
  7. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) Replace the steering lock ECU (steering lock actuator assembly). Refer to «DISASSEMBLY»(ref-400650-S01240327472011051800000) . NEXT: Go to next step
  8. CHECK STEERING LOCK RELEASED BY USUAL IGNITION Turn the engine switch on (IG). Operate the steering wheel and check the steering lock condition. OK Steering lock is released. NG --> See step 15 OK --> END (STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY) WAS DEFECTIVE)
  9. REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Replace the ID code box (immobiliser code ECU). Refer to «REMOVAL»(ref-400879-S18384846842011051800000) . NEXT: Go to next step
  10. READ VALUE USING TECHSTREAM (S CODE) Use the Data List to check if the S code certification is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note S Code Check S code certification result/ NG or OK NG: S code certification result abnormal OK: S code certification result normal - OK "OK" is displayed on the Techstream. NG --> See step 15 OK --> END (ID CODE BOX WAS DEFECTIVE)
  11. REPLACE ID CODE BOX (IMMOBILISER CODE ECU) Replace the ID code box (immobiliser code ECU). Refer to «REMOVAL»(ref-400879-S18384846842011051800000) . NEXT: Go to next step
  12. READ VALUE USING TECHSTREAM (L CODE) Use the Data List to check if the L code certification is functioning properly. Smart Access Tester Display Measurement Item/Range Normal Condition Diagnostic Note L Code Check L code certification result/ NG or OK NG: L code certification result abnormal OK: L code certification result normal - OK "OK" is displayed on the Techstream. NG --> See step 13 OK --> END (ID CODE BOX WAS DEFECTIVE)
  13. REPLACE STEERING LOCK ECU (STEERING LOCK ACTUATOR ASSEMBLY). Refer to «DISASSEMBLY»(ref-400650-S01240327472011051800000)
  14. INSPECT LIGHTING SYSTEM. Refer to «Door Courtesy Switch Circuit»(ref-400880-S41133765642011051800000)
  15. REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY). Refer to «REMOVAL»(ref-400879-S13103807332011051800000)

Note. If the steering lock ECU (steering lock actuator assembly) is replaced, with the engine switch off and the shift lever to P, open and close the driver side door to record the current lock position into the steering lock ECU (steering lock actuator assembly). If this is not performed, the engine may not start. After replacing the steering lock ECU (steering lock actuator assembly), ID code box (immobiliser Code ECU) or certification ECU (smart key ECU assembly), perform the key ID code registration. Refer to REGISTRATION .

HINT

When the engine switch is off, the main body ECU may occasionally go into a non-active state called sleep mode. Therefore, before proceeding with the inspection, it is necessary to perform the following steps to wake up the ECU

With the engine switch off, open the driver door. Then (with the engine switch still off) open and close any door several times at 1.5 second intervals.

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