FAILURE DIAGNOSIS
TNV DI Service Manual
1-123
DTCs (Diagnostic Trouble Codes) General Description
(2) P1601/2, P0605/12, P1605/2, P1606/2, P1620/12: ECU internal errors (2)
DTC Detecting Conditions
Movement at Error occurrence
Estimation of Failure cause/Error condition
• ROM data error of E-ECU
•
Checksum error of EEPROM initial individual information
•
Checksum error of control application, map data or initial individual information in FlashROM
* Checksum A: control application, checksum B: map data, checksum C: initial individual information
•
Unconformity of the map data format
Diagnosis Description
DTC
P1601/2
EEPROM error (Checksum)
P0605/12
FlashROM error (Checksum A)
P1605/2
FlashROM error (Checksum B)
P1606/2
FlashROM error (Checksum C)
P1620/12
Map format error
1 - Precondition; 2 - Detecting condition(s); 3 - Flashing pattern of failure indicator
Check points
1. Key switch ON.
2. E-ECU detects an error of the internal circuit.
3. Four flashes followed by one flash.
E-ECU
Error Mode
[Stop Immediately]:
The engine does not start up.
Run restricted?
Yes: The rack actuator relay is turned OFF, and the rack position is forcibly set to the
engine stop position.
Recovery
Conditions
No.
Remarks
1) Initial diagnosis
with the diagnosis
tool
• Check the fault indication.
• Rewrite the E-ECU software.
• Turn the key switch on/off to check the fault indication again.
*For details of the method and the procedure of diagnosis, see P.1-197
TNV_DI_SM_A4-Troubleshooting.book 123 ページ 2007年11月15日 木曜日 午後5時27分