6E–340
4JA1/4JH1 ENGINE DRIVEABILITY AND EMISSIONS
DIAGNOSTIC TROUBLE CODE (DTC) P1630 (SYMPTOM CODE A) (FLASH CODE 51) FUEL INJECTION QUANTITY CIRCUIT MALFUNCTION DIAGNOSTIC TROUBLE CODE (DTC) P1630 (SYMPTOM CODE B) (FLASH CODE 51) FUEL INJECTION QUANTITY CIRCUIT MALFUNCTION
Condition for setting the DTC and action taken when the DTC sets Flash Code
Code
Symptom Code
MIL
DTC Name
DTC Setting Condition
51
P1630
A
ON
Fuel Injection Quantity Circuit Malfunction
The PSG (pump control unit) detects high pressure solenoid valve control circuit malfunction due to high current.
Fuel injection quantity is reduced.
B
ON
Fuel Injection Quantity Circuit Malfunction
The PSG (pump control unit) detects high pressure solenoid valve control circuit malfunction due to continuous current.
1. MAB (fuel cutoff solenoid valve) is operated. 2. Desired injection quantity becomes 0mg/strk.
Circuit Description The ECM is calculates an injection quantity and an injection timing using the various sensors. And the PSG controls the high pressure solenoid valve depending on
programmed pump map data.
Fail-Safe (Back Up)