Troubleshoot DTC setting conditions
Trouble judgment time
Recovery from failure
DTC name
0340
G sensor abnormality (no signal)
Sensor or har- ・ CKP (crank position) senness disconsor signal is normal. ・ DTC: 0335, 0336, 0340, nection 0341, 1345 and 1635 are not detected. ・ Engine is running.
There is a CKP sensor signal, but not a G sensor signal.
・ No change in behavior When it *1 Wiring problem (disconnecwhile engine is rotating (cranking tion, short, high resistance) occurs in at becomes between ECM and G sensor least 7 out ・ Restarting not possible after engine stalled long, G sensor problem of 8 samBack-up: While engine rotat- about 10 Cam gear abnormality ples ing: Crank standard when sec.) Supply pump problem CKP sensor is normal After ECM internal problem engine stops: Cylinder identification not functioning (restarting not possible)
0341
G sensor abnormality (signal abnormality)
Tooth break- ・ CKP (crank position) sen- G sensor signal sor signal is normal. pulse count does age, extra signals mixed in ・ DTC: 0335, 0336, 0340, not match. 0341, 1345 and 1635 are (short with not detected. other line) ・ Engine is running.
・ No change in behavior When it *1 Wiring problem (short) while engine is rotating occurs in at (cranking between ECM and G sensor least 7 out ・ Restarting not possible becomes G sensor problem after engine stalled of 8 samlong, Cam gear abnormality Back-up: While engine rotat- about 10 Supply pump problem ples ing: Crank standard when sec.) ECM internal problem CKP sensor is normal After engine stops: Restarting not possible because cylinder identification not functioning
0380
Glow relay Relay or har- Key switch input power supcircuit abnor- ness discon- ply voltage is 16 V or higher mality nection, short, and 32 V or lower. breakage
Behavior during trouble
Conceivable cause
IN
TE RN
AL
Detected item
Preconditions when DTC is set
DTC
Glow relay monitor signal is different from the glow relay drive command signal. Sensor or har- ・ Main relay input voltage Input signals from EGR position senis 16 V or higher. ness disconnection, short, ・ DTC: 1630, 1635 are not sors U, V, and W detected. are all ON or all breakage OFF.
When it occurs in at least 25 out of 30 samples About 2.5 sec.
Low-temperature starting problem Back-up: No back-up operation Effect of exhaust gas Back-up: EGR valve allclose command
*1
About 10 sec.
Effect of exhaust gas Back-up: EGR valve allclose command
*1
Wiring problem (disconnection, short, high resistance) between ECM and EGR motor EGR valve problem ECM internal problem
CO US N F E ID O E F N TS TI M AL GL : F O OR BA T L H
E
*1
Wiring problem (disconnection, short, high resistance) between fuse and glow relay Glow relay problem ECM internal problem Wiring problem (disconnection, short, high resistance) between ECM and EGR position sensor EGR valve (position sensor) problem ECM internal problem
0487
EGR position sensor abnormality
0488
EGR valve control abnormality
Drive motor ・ DTC: 0487, 0488, 1630, and 1635 are not side discondetected. nection, valve section pinch- ・ Main relay voltage is higher than 20 V and ing, sticking lower than 32 V. ・ Difference between target EGR degree of opening and actual degree of opening is 20 % or less.
0522
Oil pressure sensor abnormality (abnormally low voltage)
Sensor or har- ・ Key switch input voltage Oil pressure sensor voltage is is 16 V or higher. ness disconbelow 0.1 V. nection, short, ・ DTC: 1633 is not detected. breakage
About 4 sec. No effect on operation Back-up: No back-up operation
*2
Wiring problem (short) between ECM and oil pressure sensor Oil pressure sensor problem ECM internal problem
0523
Oil pressure Sensor or har- ・ Key switch input voltage Oil pressure sensor voltage is is 16 V or higher. sensor ness short ・ DTC: 1633 is not above 4.85 V. abnormality detected. (abnormally high voltage)
About 4 sec. No effect on operation Back-up: No back-up operation
*2
Wiring problem (disconnection, short, high resistance) between ECM and oil pressure sensor Oil pressure sensor problem ECM internal problem
0601
ROM abnor- ROM abnormality mality
-
ROM trouble Reflash failure
-
Engine stop Back-up: Engine stop
*2
ECM internal problem
0603
EEPROM abnormality
EEPROM abnormality
-
EEPROM trouble
-
No effect on operation Back-up: No back-up operation
*2
ECM internal problem
0606
CPU abnormality
CPU abnormality
-
SUB-CPU detects a main CPU abnormality for 0.1 sec. after key is switched ON.
About the same time as occurrence
Output reduction Back-up: Injection restriction quantity 2 (multi-injection stop) SUB-CPU stops the CPU.
*2
ECM internal problem
・ 0.48 sec. or more passed after key is switched ON. ・ Key switch input power supply voltage is higher than 16 V.
RUN-SUB pulse (communication between CPU and SUB-CPU) is unchanged for 0.02 sec. or longer.
About the same time as occurrence
Output reduction Back-up: Injection quantity restriction 1
*2
ECM internal problem
Abnormality SUB-CPU with IC moni- abnormality toring CPU
Difference between target valve lift and the actual position exceeds 20 %.
96
TST-10-06-005EN 5
