DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT STEERING LOCK ECU
CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - MAIN BODY ECU)
STEERING LOCK SYSTEM - Unlock Position Sensor Signal Circuit
DESCRIPTION
The steering lock ECU sends an unlock position signal to the main body ECU. On receiving the signal, the main body ECU permits an engine start. This prevents the engine from being started with the steering locked.
The diagnosis information of the steering lock ECU is transmitted to the intelligent tester via the certification ECU (smart key ECU assembly) as the steering lock ECU is not connected to the CAN communication system.
WIRING DIAGRAM
INSPECTION PROCEDURE
- 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.
| 1.INSPECT STEERING LOCK ECU |
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Condition (Steering Lock Position) | Specified Condition |
| E26-4 (SLP1) - E26-2 (SGND) | Locked | 11 to 14 V |
| E26-4 (SLP1) - E26-2 (SGND) | Unlocked | Below 1 V |
| OK | |
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| GO TO ENTRY AND START SYSTEM (FOR START FUNCTION) (HOW TO PROCEED WITH TROUBLESHOOTING) ()
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| 2.CHECK HARNESS AND CONNECTOR (STEERING LOCK ECU - MAIN BODY ECU) |
Disconnect the E26 steering lock ECU connector.
Disconnect the E1 main body ECU connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| E26-4 (SLP1) - E1-18 (SLP) | Always | Below 1 Ω |
| E26-4 (SLP1) or E1-18 (SLP) - Body ground | Always | 10 kΩ or higher |
Result| Result | Proceed to |
| Within specified range (for Power tilt and telescopic) | A |
| Within specified range (for Manual tilt and telescopic) | B |
| Outside specified range | C |
| | REPLACE STEERING LOCK ACTUATOR (STEERING LOCK ECU) ()
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| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| A | |
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| REPLACE STEERING LOCK ACTUATOR (STEERING LOCK ECU) ()
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