Code No. C1747
Shift signal undetermined
| caution |
- Whenever the ECU is replaced, ensure
that the CAN bus lines are normal.
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OPERATION
FCM/LDW/AHB-ECU communicates with the inhibitor switch signal via the
CAN bus lines.
DIAGNOSIS CODE SET CONDITION
This diagnosis code is set when the abnormality below is detected:
- The ECU receives an invalid inhibitor switch signal from the CVT-ECU or the
A/T-ECU.
PROBABLE CAUSES
- Defective CVT or automatic transmission system (Transmission control system)
- Malfunction of the FCM/LDW/AHB-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-III other system diagnosis code.
Check the CVT diagnosis code (Refer to GROUP 23A -Troubleshooting) or the automatic
transmission (FF) diagnosis code (Refer to GROUP 23C -Troubleshooting).
Q.
Is the diagnosis code set?
Perform the relevant troubleshooting.
Go to Step 2.
STEP 2. M.U.T.-III other system data list.
Check the CVT-ECU or A/T-ECU system data list (Refer to GROUP 23A - Data List
Reference Table <CVT> or GROUP 23C -Data List Reference Table <A/T>).
- Ignition switch: ON
- Engine: Stopped
- Operate the selector lever
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CVT-ECU
Item No.
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Item name
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Selector lever position
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Normal condition
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60
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Inhibitor SW: P
|
P
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ON
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Other than P
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OFF
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61
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Inhibitor SW: R
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R
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ON
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Other than R
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OFF
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62
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Inhibitor SW: N
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N
|
ON
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Other than N
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OFF
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63
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Inhibitor SW: D
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D
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ON
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Other than D
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OFF
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73
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Inhibitor SW: L
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L
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ON
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Other than L
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OFF
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|
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A/T-ECU
Item No.
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Item name
|
Selector lever position
|
Normal condition
|
54
|
Inhibitor switch
|
Selector lever position: P
|
P
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Selector lever position: R
|
R
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Selector lever position: N
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N
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Selector lever position: D
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D
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Selector lever position: L
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L
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OK: Normal condition is displayed.
Q.
Is the check result normal?
Proceed to the diagnosis code procedure "P0705". (Refer to GROUP 23A -Troubleshooting <CVT>
or Refer to GROUP 23C -Troubleshooting <A/T>).
Go to Step 3.
STEP 3. Check whether the diagnosis code is set again.
Check again if the diagnosis code is set in the FCM/LDW/AHB-ECU.
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(1)Erase the diagnosis code.
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(2)Turn the ignition switch from "LOCK" (OFF) position to "ON" position.
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(3)Check if diagnosis code is set.
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Q.
Is the diagnosis code set?
Replace the FCM/LDW/AHB-ECU (Refer to 
).
The trouble can be an intermittent malfunction (Refer to GROUP 00 - How
to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction).