[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - INPUT SIGNAL PROCEDURES - INSPECTION PROCEDURE P-3: The inhibitor switch (reverse position) signal is not received.PRINT PAGE / INDEX / PRIOR / NEXT
INSPECTION PROCEDURE P-3: The inhibitor switch (reverse position) signal is not received.
 CAUTION
 Whenever the ECU is replaced, ensure that the input signal circuit is normal.
COMMENTS ON TROUBLE SYMPTOM
Input signal from the inhibitor switch (reverse position) is used to operate the functions below. If the signal is abnormal, these functions will not work normally.
  • R (reverse) position alarm function
  • Rear wiper
POSSIBLE CAUSES
  • Malfunction of the inhibitor switch
  • Malfunction of the ETACS-ECU
  • Damaged harness wires and connectors
DIAGNOSIS PROCEDURE
Step 1. Connector check: B-22 inhibitor switch connector and C-220 ETACS-ECU connector
Q: Is the check result normal?
YES:  Go to Step 2.
NO:  Repair the defective connector.
Step 2. Check the inhibitor switch
Refer to GROUP 23A - On-vehicle Service .
Q: Is the check result normal?
YES:  Go to Step 3.
NO:  Replace the inhibitor switch.
Step 3. Measure the voltage at the C-220 ETACS-ECU connector.
  1. Disconnect the connector, and measure at the wiring harness side.
  1. Ignition switch: ON
  1. Shift position: R position
  1. Voltage between C-220 ETACS-ECU connector terminal No.39 and body earth
    2. OK: Battery positive voltage
Q: Is the check result normal?
YES:  Replace the ETACS-ECU.
NO:  Go to Step 4.
Step 4. Measure the voltage at the B-22 inhibitor switch connector.
  1. Disconnect the connector, and measure at the wiring harness side.
  1. Ignition switch: ON
  1. Voltage between B-22 inhibitor switch connector terminal No.8 and body earth
    2. OK: Battery positive voltage
Q: Is the check result normal?
YES:  Go to Step 5.
NO:  Go to Step 6.
Step 5. Check the wiring harness between B-22 inhibitor switch connector terminal No.7 and C-220 ETACS-ECU connector terminal No.39.
NOTE: Prior to the wiring harness inspection, check joint connector C-02 and intermediate connector C-105, and repair if necessary.
  • Check the input line for open circuit.
Q: Is the check result normal?
YES:  Go to Step 7.
NO:  Repair the wiring harness.
Step 6. Check the wiring harness between B-22 inhibitor switch connector terminal No.8 and the ignition switch (IG1).
NOTE: Prior to the wiring harness inspection, check intermediate connector C-106, joint connector C-16 and junction block connectors C-202 and C-203, and A/T control relay connector B-16X, and repair if necessary.
  • Check the power supply line to the ignition switch (IG1) for open circuit.
Q: Is the check result normal?
YES:  The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO:  Repair the wiring harness.
Step 7. Confirm communication data by using the SWS monitor.
<Selected item> ETACS
  • Turn the ignition switch to the ON position.
  • Shift position: R position
Item No.
 Item name
 Normal conditions
Item 41
 INHIBITOR SW
 ON

OK: Normal condition is displayed.
Q: Is the check result normal?
YES:  The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to Cope with Intermittent Malfunction ).
NO:  Replace the ETACS-ECU.
[54C] SMART WIRING SYSTEM (SWS) USING SWS MONITOR <Hong Kong spec.> - - INPUT SIGNAL PROCEDURES - INSPECTION PROCEDURE P-3: The inhibitor switch (reverse position) signal is not received.PRINT PAGE / INDEX / PRIOR / NEXT
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