Trouble Recovery

DTC DTC name Detected item Preconditions when DTC is set DTC setting conditions

0340 G sensor abnormality (no signal) Sensor or harness disconnection ・ CKP (crank position) sensor signal is normal. ・ DTC: 0335, 0336, 0340, 0341, 1345 and 1635 are not detected. ・ Engine is running. There is a CKP sensor signal, but not a G sensor signal.

0341 G sensor abnormality (signal abnormality) Tooth breakage, extra signals mixed in (short with other line) ・ CKP (crank position) sensor signal is normal. ・ DTC: 0335, 0336, 0340, 0341, 1345 and 1635 are not detected. ・ Engine is running. G sensor signal pulse count does not match.

0380 Glow relay circuit abnormality

0487 EGR position sensor abnormality Relay or harness disconnection, short, breakage Key switch input power supply voltage is 16 V or higher and 32 V or lower.

Sensor or harness disconnection, short, breakage ・ Main relay input voltage is 16 V or higher. ・ DTC: 1630, 1635 are not detected. Glow relay monitor signal is different from the glow relay drive command signal. Input signals from EGR position sensors U, V, and W are all ON or all OFF.

Trouble judgment time When it occurs in at least 7 out of 8 samples

When it occurs in at least 7 out of 8 samples

When it occurs in at least 25 out of 30 samples About 2.5 sec. Behavior during trouble

・ No change in behavior while engine is rotating ・ Restarting not possible after engine stalled Back-up: While engine rotating: Crank standard when CKP sensor is normal After engine stops: Cylinder identification not functioning (restarting not possible) ・ No change in behavior while engine is rotating ・ Restarting not possible after engine stalled Back-up: While engine rotating: Crank standard when CKP sensor is normal After engine stops: Restarting not possible because cylinder identification not functioning Low-temperature starting problem Back-up: No back-up operation

Effect of exhaust gas Back-up: EGR valve allclose command

0488 EGR valve control abnormality

0522 Oil pressure sensor abnormality (abnormally low voltage) 0523 Oil pressure sensor abnormality (abnormally high voltage) Drive motor side disconnection, valve section pinching, sticking

Sensor or harness disconnection, short, breakage ・ DTC: 0487, 0488, 1630, and 1635 are not detected. ・ Main relay voltage is higher than 20 V and lower than 32 V. ・ Difference between target EGR degree of opening and actual degree of opening is 20 % or less. ・ Key switch input voltage is 16 V or higher. ・ DTC: 1633 is not detected. Difference between target valve lift and the actual position exceeds 20 %.

Oil pressure sensor voltage is below 0.1 V.

Sensor or harness short ・ Key switch input voltage is 16 V or higher. ・ DTC: 1633 is not detected. Oil pressure sensor voltage is above 4.85 V. About 10 sec. Effect of exhaust gas Back-up: EGR valve allclose command

About 4 sec. No effect on operation Back-up: No back-up operation

About 4 sec. No effect on operation Back-up: No back-up operation

0601 ROM abnormality 0603 EEPROM abnormality

0606 CPU abnormality ROM abnormality EEPROM abnormality

CPU abnormality

Abnormality with IC monitoring CPU SUB-CPU abnormality - ROM trouble Reflash failure

- Engine stop Back-up: Engine stop - EEPROM trouble - No effect on operation Back-up: No back-up operation

- SUB-CPU detects a main CPU abnormality for 0.1 sec. after key is switched ON.

・ 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

About the same time as occurrence Output reduction Back-up: Injection restriction quantity 2 (multi-injection stop) SUB-CPU stops the CPU. Output reduction Back-up: Injection quantity restriction 1 Recovery from failure *1 (cranking becomes long, about 10 sec.) Conceivable cause

Wiring problem (disconnection, short, high resistance) between ECM and G sensor G sensor problem Cam gear abnormality Supply pump problem ECM internal problem

*1 (cranking becomes long, about 10 sec.) Wiring problem (short) between ECM and G sensor G sensor problem Cam gear abnormality Supply pump problem ECM internal problem

*1 Wiring problem (disconnection, short, high resistance) between fuse and glow relay Glow relay problem ECM internal problem *1 Wiring problem (disconnection, short, high resistance) between ECM and EGR position sensor EGR valve (position sensor) problem ECM internal problem *1 Wiring problem (disconnection, short, high resistance) between ECM and EGR motor EGR valve problem ECM internal problem

*2 Wiring problem (short) between ECM and oil pressure sensor Oil pressure sensor problem ECM internal problem *2 Wiring problem (disconnection, short, high resistance) between ECM and oil pressure sensor Oil pressure sensor problem ECM internal problem *2 ECM internal problem

*2 ECM internal problem

*2 ECM internal problem

*2 ECM internal problem