Isuzu 2000 Trooper Workshop Manual page 1314

moving connectors and wiring harnesses related to the
sensor.
A change in the display will indicate the location of
the fault. If DTC P1299 cannot be duplicated, the
information included in the Faillure Records data
can be useful in determined vehicle mileage since
the DTC was last set.
DTC P1299 - ETC Forced Engine Shutdown Mode
Step
1 Was the "On-Board (OBD) System Check" performed?
2 Was the "Electric Throttle Control (ETC) System
Check" performed?
3 Observe the TP angle reading on the Tech 2 while
slowly opening the throttle.
Does the TP angle increase steadily and evenly from
the closed throttle value to the wide open throttle
value?
4 1. Ignition "OFF."
2. Disconnect the DC motor.
Is the DC motor reading near the specified value?
5 Check the DC motor harness between the PCM and
DC Motor circuit at the DC motor harness connector.
Was a problem found?
6 Check the throttle valve assembly.
Was a problem found?
7 Replace the DC motor. (Replace the Throttle valve
assembly)
Is the action complete?
8 1. Disconnect the TP sensor.
2. Observe the TP sensor reading on the Tech 2.
Is the TP sensor reading near the specified value?
9 1. Connect a test light between the 5Volt reference
circuit and the TP1 and TP2 sensor signal circuit at
the TP sensor harness connector.
2. .Observe the TP sensor reading on the Tech 2.
Is the TP sensor reading near the specified value?
TROOPER 6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
Action
If it is determined that the DTC occurs
intermittently, performing the DTC P1299
Diagnostic Chart may isolate the cause of the
fault.
Value(s) Yes
Go to Step 2
—
— Go to Step 3
Closed
throttle TP
sensor 1 =8 ∼
10 % TP
sensor 2 =90
∼ 92 % Wide
open throttle
TP sensor 1
=90 ∼ 92 %
TP sensor 2
=8 ∼ 10 %
Go to Step 8
0.3 ∼ 100m
Go to Step 5
— Verify repair
Verify repair
— Verify repair
0V Go to Step 9
Go to Step 12
5V
6E–445
No
Go to OBD
System
Check
Go to ETC
System
Check
Go to Step 4
Go to Step 7
Go to Step 6
Go to Step 7
Go to Step 8
Go to Step 10
Go to Step 11