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Isuzu D-Max / Isuzu Rodeo (TFR/TFS). Manual - part 24

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

6E–91

Check Engine Lamp (MIL) On Steady

Step

Action

Value(s)

Yes

1. Ignition “Off”, engine “Off”.

2. Disconnect the ECM connector.

3. Ignition “On”.

Was the “CHECK ENGINE” lamp turned on?

—

Go to Step 2

Go to Step 4

Using the DVM and check the “CHECK ENGINE”
lamp circuit.

1. Ignition “Off”, engine “Off”.

2. Disconnect the meter connector and ECM

connector.

3. Check the circuit for short to ground circuit.

Was the problem found?

—

Verify repair

Go to Step 3

Replace the meter assembly.
Is the action complete?

—

Verify repair

—

Is the ECM programmed with the latest software
release?
If not, download the latest software to the ECM using
the “SPS (Service Programming System)”.
Was the problem solved?

—

Verify repair

Go to Step 5

B-23

C-56

4JA1-TC

B-23

4JH1-TC

6E–92

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

Replace the ECM.
Is the action complete?
IMPORTANT: The replacement ECM must be
programmed. Refer to section of the Service
Programming System (SPS) in this manual.
Following ECM programming, the immobiliser system
(if equipped) must be linked to the ECM. Refer to
section 11 “Immobiliser System-ECM replacement” for
the ECM/Immobiliser linking procedure.

—

Verify repair

—

Step

Action

Value(s)

Yes

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

6E–93

ECM Diagnostic Trouble Codes

Flash

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)

P0100

Mass Air Flow (MAF) Sensor Volt-
age Supply Circuit High Input

MAF sensor power supply
voltage is more than 5.2V.

ECM uses mass air flow
1600mg/strk & EGR 10%
(4JA1-TC only) condition(s)
as substitute.

MAF sensor power supply voltage
is below 5.2V.

1. Sensor power supply circuit
short to battery voltage circuit.
2. MAF sensor malfunction.
3. ECM malfunction.

Mass Air Flow (MAF) Sensor Volt-
age Supply Circuit Low Input

MAF sensor power supply
voltage is below 4.6V.

MAF sensor power supply voltage
is more than 4.6V.

1. Sensor power supply circuit
short to ground circuit.
2. MAF sensor malfunction.
3. ECM malfunction.

Mass Air Flow (MAF) Sensor Out-
put Circuit Low Input

1. Engine speed is between
600rpm and 5000rpm.
2. MAF sensor output is below
-33.7mg/strk.

MAF sensor output is more than -
27.4mg/strk.

1. Sensor power supply circuit
open circuit.
2. Sensor signal circuit open or
short to ground circuit.
3. Sensor heater harness open
circuit.
4. Poor connector connection.
5. MAF sensor malfunction.
6. ECM malfunction.

83/88

P0110(1)

Mass Air Flow (MAF) Sensor Out-
put Circuit High Input

1. Engine speed is between
600rpm and 5000rpm.
2. MAF sensor output is more
than 1784mg/strk.

MAF sensor output is below
1784mg/strk.

1. Sensor signal circuit short to
voltage circuit.
2. Sensor ground circuit open or
short to voltage circuit.
3. MAF sensor malfunction.
4. ECM malfunction.

88/ 92

P0110(1)

P0110

Intake Air Temperature (IAT) Sen-
sor Circuit High Input

IAT sensor output voltage is
more than 4.7V.

ECM use 0°C conditions as
substitute.

IAT sensor output voltage is below
4.7V.

1. Sensor signal circuit open or
short to voltage circuit.
2. Sensor ground circuit open or
short to voltage circuit.
3. Poor connector connection
4. IAT sensor malfunction.
5. ECM malfunction.

84/92

P0100(B)/

P0100(C)

Intake Air Temperature (IAT) Sen-
sor Circuit Low Input

IAT sensor output voltage is
below 0.3V.

IAT sensor output voltage is more
than 0.3V.

1. Sensor signal circuit short to
ground circuit.
2. IAT sensor malfunction.
3. ECM malfunction.

P0115

Engine Coolant Temperature
(ECT) Sensor Circuit High Input

ECT sensor output voltage is
more than 4.7V.

1. ECM uses fuel tempera-
ture as substitute.
2. ECM uses 60°C condition
for injection timing control.
3. ECM uses -15°C condition
for glow time control.

ECT sensor output voltage is below
4.7V.

1. Sensor signal circuit open or
short to voltage circuit.
2. Sensor ground circuit open or
short to voltage circuit.
3. Poor connector connection
4. ECT sensor malfunction.
5. ECM malfunction.

89/93

Engine Coolant Temperature
(ECT) Sensor Circuit Low Input

ECT sensor output voltage is
below 0.3V.

ECT sensor output voltage is more
than 0.3V.

1. Sensor signal circuit short to
ground circuit.
2. ECT sensor malfunction.
3. ECM malfunction.

6E–94

4JA1-TC/4JH1-TC ENGINE DRIVEABILITY AND EMISSIONS

P0180

Fuel Temperature Sensor Circuit
Range/Performance

FT sensor output is high tem-
perature (more than 150°C) or
low temperature (below -
40°C).

The ECM use 75°C condi-
tions as substitute.

FT sensor output is correct temper-
ature range between 150°C and -
40°C.

1. ECM malfunction.
2. PSG (pump control unit) mal-
function.

P0215

ON at

next
igni-

tion

cycle

Fuel Cutoff Solenoid Valve Mal-
function

1. Ignition key switch off.
2. Engine speed is below
1500rpm.
3. Vehicle speed is below
1.5km/h.
4. PSG (pump control unit)
recognizes MAB (fuel cutoff
solenoid valve) signal from the
ECM, but the MAB could not
operate.

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. MAB (fuel cutoff solenoid
valve) malfunction.

Fuel Cutoff Solenoid Valve Circuit
High Input

ECM does not command MAB
(fuel cutoff solenoid valve) sig-
nal to the PSG (pump control
unit), but PSG detected MAB
signal line circuit is high level.

Engine does not start.

No recovery.

1. MAB (fuel cutoff solenoid
valve) signal circuit short to volt-
age circuit.
2. PSG (pump control unit) mal-
function.

105

Fuel Cutoff Solenoid Valve
Always Active

1. Ignition key switch off.
2. Engine speed is below
1500rpm.
3. Vehicle speed is below
1.5km/h.
4. PSG (pump control unit)
does not recognize MAB (fuel
cutoff solenoid valve) signal
from the ECM.

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. MAB (fuel cutoff solenoid
valve) signal circuit open or short
to ground circuit.
2. PSG (pump control unit) mal-
function.

105

Fuel Cutoff Solenoid Valve Mal-
function

1. Ignition key switch off.
2. CAN controller does not
operate Bus-off.

No fail-safe function.

1. ECM malfunction.
2. PSG (pump control unit) mal-
function.

P0216

Injection Timing Control Circuit
Malfunction (Timer Deviation)

1. Engine speed is more than
700rpm.
2. Fuel injection quantity is
more than 4mg/stk.
3. Deviation of actual injection
timing and desired injection
timing is more than +3°CA or
-6°CA for 8 seconds.

Fuel injection quantity is
reduced.

Deviation of actual injection timing
and desired injection timing is
below +3°CA or -6°CA for 8 sec-
onds.

1. Timing control valve malfunc-
tion.
2. Timer piston sticking.
3. Pump camshaft speed sensor
malfunction.

Injection Timing Control Circuit
Malfunction (Timer Fluctuation)

1. Engine speed is more than
2014rpm.
2. Fluctuation of actual injec-
tion timing is more than
±5.2°CA.

1. Engine speed is more than
2014rpm.
2. Fluctuation of actual injection tim-
ing is below ±5.2°CA.

1. Insufficient air bleeding of fuel
line.
2. Fuel filter clogging.
3. Timing control valve malfunc-
tion.
4. Pump camshaft speed sensor
malfunction.

Flash

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)

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