Code No. B1762
IOD fuse not seated fully
caution |
- Before
replacing the ECU, ensure that the power supply circuit, the earth
circuit and the communication
circuit are normal.
- When the ETACS-ECU of vehicles without KOS is replaced, the encrypted
code of the ignition
key needs to be registered to the ETACS-ECU. (If the encrypted code is
not registered, the engine
cannot be started. Register the encrypted code as described in
Immobilizer System - How
to Register Key ID
.)
|
TROUBLE JUDGMENT
- When voltage at the power supply fuse (fuse No. BF3)
drops below 5 V with the ignition switch ON and then the ACC OFF signal is
detected for 5 seconds,
the ETACS-ECU will store diagnosis code No. B1762.
PROBABLE CAUSES
- Malfunction of fuse No. BF3
- Malfunction of the ETACS-ECU
- Malfunction of the OSS-ECU <Vehicles with one touch start
system>
- Damaged harness wires and connectors
|
STEP 1. Check the power supply fuses (fuse No. BF3)
|
![](../../../img/54/ACB04410AC00ENG.png)
|
Check the power supply fuses (fuse No. BF3).
(Refer to GROUP 00 - How to Use
Troubleshooting/Inspection Service Points - Inspection Service
Points for
a Blown Fuse .)
Q.
Is the fuse in good condition?
Go to Step 2
Refer to GROUP 00
- How to Use Troubleshooting/Inspection Service
Points - Inspection Service Points for a Blown Fuse .
Then go to Step 5.
|
|
STEP 2. Check of short to power supply, short to earth, and open
circuit
in IODI line between fusible link and ETACS-ECU connector
|
|
Q.
Is the check result normal?
|
|
YES <vehicles with one touch start
system> :
Go to Step 3
|
|
|
|
YES <vehicles without one touch start
system> :
Go to Step 4
|
|
|
|
NO : Repair the connector(s) or
wiring harness. Then go to Step 5.
|
|
|
|
STEP 3. Check the M.U.T.-III Diagnosis code for other
systems
|
|
Check that the OSS-ECU set a diagnosis
code.
|
|
Q.
Is the diagnosis code set?
|
|
Diagnose the OSS-ECU. Refer to GROUP
42B, Troubleshooting .
|
|
|
|
Go to Step 4
|
|
|
|
STEP 4. Check of short to power supply, short to earth, and open
circuit
in ACC line between ignition switch (ACC) <vehicles without one
touch start system>or
OSS-ECU (ACC) <vehicles with one touch start system> and
ETACS-ECU connector
|
|
Q.
Is the check result normal?
|
|
Go to Step 5
|
|
|
|
Repair the connector(s) or wiring
harness. Then go to Step 5.
|
|
|
|
STEP 5. Check whether the diagnosis code is reset.
|
|
Check again if the diagnosis code is set to the
ETACS-ECU.
|
|
(1)Erase the diagnosis code.
|
|
(2)Turn the ignition switch from "LOCK" (OFF) position to
"ON" position.
|
|
(3)Check if diagnosis code is set.
|
|
Q.
Is the diagnosis code set?
|
|
Replace the ETACS-ECU.
|
|
|
|
If the
trouble symptom is resolved, an intermittent malfunction such as poorly
engaged connector(s) or wiring harness is suspected. (Refer to GROUP 00
- How to Use
Troubleshooting/Inspection Service Points - How to Cope with
Intermittent
Malfunction .)
|
|
|