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Inspection Procedure 3: Even when the selector lever is in the P position, the ignition switch cannot be turned to the "LOCK" (OFF) position. /When the selector lever is in other than the P position, the ignition switch can be turned to the "LOCK" (OFF) position.
 
 
 
 
TECHNICAL DESCRIPTION (COMMENT)
The mechanical steering lock controls the key interlock solenoid, so that the steering lock cylinder turns from "ACC" to "LOCK" (OFF) only when the selector lever is in the P position. If the steering lock cylinder does not turn from "ACC" to "LOCK" (OFF) even when the selector lever is in the P position, or if the steering lock cylinder turns from "ACC" to "LOCK" (OFF) when the selector lever is in other than the P position, the key interlock solenoid, selector lever assembly, wiring harness, or connector may have a problem.
 
 
TROUBLESHOOTING HINTS
  • The key interlock solenoid may be defective
  • The selector lever assembly may be defective
  • The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
 
 
DIAGNOSIS
Required Special Tools:
  • MB992006: Extra fine probe
  • MB991223: Harness set
STEP 1. Using scan tool (M.U.T.-IIISE), check data list.
Check the ETACS-ECU data list.
(1)
cautionTo prevent damage to scan tool (M.U.T.-IIISE), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-IIISE).
Connect scan tool (M.U.T.-IIISE). Refer to "How to connect Scan Tool (M.U.T.-IIISE) ."
(2) Turn the ignition switch to the "ACC" position.
 
Item No.Item nameNormal condition
111ACC switchON
Item No.Item nameNormal condition
111ACC switchON
OK: Normal condition is displayed.
Is the check result normal?
Go to Step 2.
Troubleshoot the ETACS-ECU. Refer to Inspection Procedure 1 "The ignition switch (ACC) signal is not received" .
 
STEP 2. Voltage measurement at selector lever assembly connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch from "ACC" position.
(3) Check the voltage between the selector lever assembly connector (power supply terminal) and body ground.
OK: Is the measured voltage approximately 12 volts (battery positive voltage)
Is the check result normal?
Go to Step 4.
Go to Step 3.
 
STEP 3. Check of short to power supply, short to ground, and open circuit in ACC1 line between selector lever assembly connector and ETACS-ECU connector.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the connector(s) or wiring harness.
 
STEP 4. Resistance measurement at selector lever assembly connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the selector lever assembly connector (ground terminal) and body ground.
OK: Is the measured resistance 2 ohms or less
Is the check result normal?
Go to Step 6.
Go to Step 5.
 
STEP 5. Check of open circuit in ground line between selector lever assembly connector and body ground.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the connector(s) or wiring harness.
 
STEP 6. Key interlock solenoid check.
Refer to GROUP 37 - Steering column shaft assembly .
Is the check result normal?
Go to Step 7.
Replace the key interlock solenoid.
 
STEP 7. Resistance measurement at key interlock solenoid connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the resistance between the key interlock solenoid connector (ground terminal) and body ground.
OK: Is the measured resistance 2 ohms or less
Is the check result normal?
Go to Step 9.
Go to Step 8.
 
STEP 8. Check of open circuit in ground line between key interlock solenoid connector and body ground.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Repair the connector(s) or wiring harness.
 
STEP 9. Check of short to power supply, short to ground, and open circuit in signal line between selector lever assembly connector and key interlock solenoid connector.
Is the check result normal?
Go to Step 10.
Repair the connector(s) or wiring harness.
 
STEP 10. Retest the system.
Check that the ignition switch can be turned to the "LOCK" (OFF) position when the selector lever is in the P position. Or, check that the ignition switch cannot be turned to the "LOCK" (OFF) position when the selector lever is in other than the P position.
Is the check result normal?
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).
Replace the selector lever assembly.