DIAGNOSTIC FUNCTION
The TCM determines that the system is defective if the calculated value does not correspond with the stored value.
DESCRIPTIONS OF MONITOR METHODS
The memory backup malfunction is detected.
MONITOR EXECUTION CONDITIONS (OTHER MONITOR AND SENSOR)
Other Monitor (There is no temporary DTC stored in memory for the item monitored below)
Sensor (The sensor below is determined to be normal)
LOGIC FLOW CHARTS (Monitor Sequence)
DTC SET CONDITIONS
Check Condition
- Ignition switch is "ON" position
Judgment Criteria
- Calculated checksum is not same as memorized checksum.
OBD-II DRIVE CYCLE PATTERN
Ignition switch: ON (start the engine and keep it for 10 seconds or more)
PROBABLE CAUSES
- Damaged wiring harness and connectors
- Malfunction of TCM