Inspection Procedure
- READ DATA LIST USING HAND-HELD TESTER
- Connect the hand-held tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
- Turn the ignition switch ON with the key that cannot start the engine.
- Read the DATA LIST.
Steering lock ECU:
DATA LIST - STEERING LOCK ECUItem Measurement Item/ Display (Range) Normal Condition Diagnostic Note KEY SW Unlock warning switch signal/ ON or OFF ON: Key is in ignition key cylinder OFF: No key is in ignition key cylinder - OK: "ON" (Key is in ignition key cylinder) appears on the screen.
NG: Go to step 2
OK: REPLACE STEERING LOCK ECU
- INSPECT UNLOCK WARNING SWITCH ASSY
- Remove the unlock warning switch.
- Measure the resistance of the switch.
Standard:
UNLOCK WARNING SWITCH - RESISTANCE TABLETester Connection Switch Position Specified Condition 3 - 4 Ignition switch pushed Below 1 Ω 3 - 4 Ignition switch not pushed 10 kΩ or higher 2 - 4 Key inserted in ignition key cylinder Below 1 Ω 2 - 4 No key in ignition key cylinder 10 kΩ or higher NG: REPLACE UNLOCK WARNING SWITCH ASSY
OK: Go to next step
- CHECK WIRE HARNESS (UNLOCK WARNING SWITCH ASSY - BODY GROUND)
- Disconnect the U7 switch connector.
- Measure the resistance of the wire harness side connector.
Standard:
UNLOCK WARNING SWITCH ASSY - BODY GROUND - RESISTANCE TABLETester connection Specified condition U7-4 - Body ground Below 1 Ω Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: Go to next step
- CHECK WIRE HARNESS (STEERING LOCK ECU - UNLOCK WARNING SWITCH ASSY)
- Disconnect the S46 ECU connector.
- Disconnect the U7 switch connector.
- Measure the resistance of the wire harness side connectors.
Standard:
STEERING LOCK ECU - UNLOCK WARNING SWITCH - RESISTANCE TABLETester connection Specified condition S46-12 (KSW) - U7-2 Below 1 Ω S46-11 (PUSH) - U7-3 Below 1 Ω Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
NG: REPAIR OR REPLACE HARNESS AND CONNECTOR
OK: REPLACE STEERING LOCK ECU