2018 / ECLIPSE CROSS / EC - Workshop Manual
13 -FUEL > 13A-DIRECT INJECTION AND MULTIPOINT FUEL INJECTION (DI AND MPI) > TROUBLESHOOTING > DIAGNOSIS CODE PROCEDURES > CODE NO. P0622 LIN COMMUNICATION ERROR (ALTERNATOR)
Code No. P0622: LIN Communication Error (Alternator)
OPERATION
- The energised state of the alternator field coil is inputted from the alternator connector terminal C to the engine-ECU connector terminal LNBS via the Local Interconnect Network (LIN).
FUNCTION
- A signal of the power supply duty ratio for the alternator field coil is inputted to the engine-ECU.
- In response to the signal, the engine-ECU detects the alternator output current and controls the idling speed according to the output current (electric load).
TROUBLE JUDGEMENT
Check Conditions
- After 2 seconds since the ignition switch is turned ON or since the completion of engine start.
- Battery positive voltage is more than 10 V and is less than 16.5 V.
Judgement Criterion
- The engine-ECU cannot receive the data from the alternator.
or
- The alternator cannot receive the data from the engine-ECU.
FAIL-SAFE AND BACKUP FUNCTION
- Prohibits alternator output suppression control against current consumers. (operate as a normal alternator.)
- In the normal operation, the auto stop is prohibited.
PROBABLE CAUSES
- Failed alternator
- Open/short circuit or harness damage in alternator circuit or loose connector contact
- Failed engine-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check of open circuit, short circuit, and damage in LNBS line between alternator connector and engine-ECU connector.
Is the check result normal?
Go to Step 2.
Repair the connector(s) or wiring harness.
STEP 2. M.U.T.-IIISE diagnosis code
STEP 3. Replace the alternator
- After replacing the alternator, reconfirm whether the diagnosis code is set.
Is the diagnosis code set?
Replace the engine-ECU. Check end.
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