2018 / ECLIPSE CROSS / EC - Workshop Manual
23 -AUTOMATIC TRANSMISSION > 23A-CVT > TROUBLESHOOTING<CVT><CVT> > DIAGNOSIS CODE PROCEDURES > CODE NO. P1637 MEMORY BACKUP MALFUNCTION
Code No. P1637: Malfunction of Memory Backup
DIAGNOSTIC FUNCTION
The CVT-ECU determines that the system is defective if the calculated value does not correspond with the stored value.
JUDGEMENT CRITERIA
The memory backup malfunction is detected.
PROBABLE CAUSES
- Damaged wiring harness and connectors
- Malfunction of CVT-ECU
DIAGNOSIS PROCEDURE
STEP 1. M.U.T.-IIISE diagnosis code
Check whether a diagnosis code other than P1637 is set.Is diagnosis code set?
Carry out the appropriate troubleshooting.
Go to Step 2.
STEP 2. Check for open circuit or short to earth in BATT, BAT2 line between the CVT-ECU connector and the battery
Is the check result normal?
Replace the CVT-ECU. Repair the connector(s) or wiring harness.
