Isuzu Trooper (1998-2002 year). Service manual — part 142
4B2–55
DRIVE LINE CONTROL SYSTEM (TOD)
Check flow
Trouble code
Phenomenon
Standard
7
21
(P1716)
The voltage of the throttle position
sensor (TPS) is faulty.
The signal voltage from the TPS deviates from the stan-
dard range.
D04RY00053
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–56
Step
Action
Yes
No
1
1. Turn off the starter switch.
Is the battery voltage normal?
Go to Step 2
Charge or
replace the
battery.
Go to Step 6
2
1. Turn on the starter switch.
Does the voltage between terminals 21 and 19 fall within the
standard range above?
Go to Step 3
Go to Step 3
3
1. Turn off the starter switch.
2. Disconnect the ECU connector.
3. Turn on the starter switch.
Does the voltage between terminals (B–68)9 and (B–67)11 fall
within the standard range above?
The ECU has
failed. Replace
the ECU.
Go to Step 6
Go to Step 4
4
Is the harness healthy?
Go to Step 5
Repair the
harness.
Go to Step 6
5
Is the TPS healthy?
Go to Step 6
Replace the TPS.
Go to Step 6
6
1. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Go to Step 6
4B2–57
DRIVE LINE CONTROL SYSTEM (TOD)
Check flow
Trouble code
Phenomenon
Standard
8
34
The diesel/gasoline engine identifi-
cation signal is faulty.
6VE1: Continuity established
4JX1: No continuity
The engine identification signals of 6VE1 and 4JX1 are
changed each other.
D04RY00053
DRIVE LINE CONTROL SYSTEM (TOD)
4B2–58
6VE1
Step
Action
Yes
No
1
1. Turn off the starter switch.
Is the continuity established between terminals 14 and 19?
Go to Step 2
The harness is
broken. Repair
the circuit.
Go to Step 3
2
1. Turn on the starter switch.
Does the voltage between terminals 14 and 19 indicate 0V?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”
The ECU has
failed. Replace
the ECU.
Go to Step 3
3
1. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 3
4JX1
Step
Action
Yes
No
1
1. Turn off the starter switch.
Is the continuity established between terminals 14 and 19?
The harness for
terminal 14 is
short–circuited to
GND.
Repair the circuit.
Go to Step 3
Go to Step 2
2
1. Turn on the starter switch.
Does the voltage between terminals 14 and 19 indicate 5V?
The phenomenon
is not
reproduced.
Refer to
“Troubles
intermittently
observed”
The ECU has
failed. Replace
the ECU.
Go to Step 3
3
1. Check that all the parts are mounted.
2. Clear the trouble code.
Is this step complete?
Repeat the
“Diagnosis Flow”.
Return to Step 3
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