4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS
6E–95
53
P0251
6
ON
Injection Pump Malfunction
1. No pump camshaft speed
sensor error.
2. High pressure solenoid
valve control pulse width does
not match with desired fuel
injection quantity.
1. MAB (fuel cutoff solenoid
valve) is operated.
2. Desired injection quantity
becomes 0mg/strk.
No recovery until condition match in
the next ignition key cycle.
1. PSG (pump control unit) mal-
function.
2. Pump camshaft speed sensor
malfunction.
-
-
7
ON
Injection Pump Malfunction
1. No pump camshaft speed
sensor error.
2. No CKP sensor error.
3. Difference of engine speed
and doubled pump camshaft
speed is more than 720rpm
(4JA1-TC) or 690rpm (4JH1-
TC).
1. No pump camshaft speed sensor
error.
2. No CKP sensor error.
3. Difference of engine speed and
doubled pump camshaft speed is
below 720rpm (4JA1-TC) or
690rpm (4JH1-TC).
No recovery until in the next ignition
key cycle.
1. Missing CKP sensor pulses.
2. Electrical interference.
3. Magnetic interference.
4. PSG (pump control unit) mal-
function.
91
-
9
ON
Injection Pump Malfunction
No pump map programmed in
the PSG (pump control unit) or
PSG malfunction.
No recovery until condition match in
the next ignition key cycle.
PSG (pump control unit) malfunc-
tion.
-
-
A
ON
Injection Pump Malfunction
EEPROM or A/D converter
malfunction in the PSG (pump
control unit).
Fuel injection quantity is
reduced.
EEPROM or A/D converter no mal-
function in the PSG (pump control
unit).
No recovery until in the next ignition
key cycle.
PSG (pump control unit) malfunc-
tion.
-
-
B
ON
Injection Pump Malfunction
PSG (pump control unit) rec-
ognized high pressure sole-
noid valve drive circuit error.
No fail-safe function.
No recovery until condition match in
the next ignition key cycle.
PSG (pump control unit) malfunc-
tion.
-
-
D
ON
Injection Pump Malfunction
PSG (pump control unit) could
not measure the high pressure
solenoid valve drive voltage.
PSG (pump control unit) malfunc-
tion.
-
-
E
ON
Injection Pump Malfunction
ECM could not accept PSG
(pump control unit) message.
1. MAB (fuel cutoff solenoid
valve) is operated.
2. Desired injection quantity
becomes 0mg/strk.
ECM accepts PSG (pump control
unit) message.
1. CAN high circuit open, short to
ground or short to voltage circuit.
2. CAN low circuit open, short to
ground or short to voltage circuit.
3. ECM malfunction.
4. PSG (pump control unit) mal-
function.
99/100
P1650(A)/
P1651(B)
Flash
Code
Code
Symptom
Code
MIL
DTC Name
DTC Setting Condition
Fail-Safe (Back Up)
Recovery Condition
Related Failure Parts
Related
ECM Pin
No.
Related
Multiple
DTC
4JA1
-TC
(MT)
4JH1
-TC
(MT)
4JH1
-TC
(AT)