Workshop Manual

6E–456
6VE1 3.5L ENGINE DRIVEABILITY AND EMISSIONS
locks, improperly formed or damaged terminals, and
poor terminal to wire connection.
B Damaged harness-Inspect the wiring harness for
damage. If the harness appears to be OK, observe the
TP sensor 1, TP sensor 2 display on the Tech 2 while
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 Failure Records data can
be useful in determined vehicle mileage since the
DTC was last set.
If it is determining that the DTC occurs intermittently,
performing the DTC P1299 Diagnostic Chart may
isolate the cause of the fault.
DTC P1299 - ETC Forced Engine Shutdown Mode
Step Action Value(s) Yes No
1 Was the “On-Board (OBD) System Check” performed?
— Go to Step 2
Go to OBD
System
Check
2 Was the “Electric Throttle Control (ETC) System
Check” performed?
— Go to Step 3
Go to ETC
System
Check
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?
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 Go to Step 4
4 1. Ignition “OFF”.
2. Disconnect the DC motor.
Is the DC motor reading near the specified value?
0.3 ∼ 100W Go to Step 5 Go to Step 7
5 Check the DC motor harness between the PCM and
DC Motor circuit at the DC motor harness connector.
Was a problem found?
— Verify repair Go to Step 6
6 Check the throttle valve assembly.
Was a problem found?
Verify repair Go to Step 7
7 Replace the DC motor. (Replace the Throttle valve
assembly)
Is the action complete?
— Verify repair Go to Step 8
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?
0V Go to Step 9 Go to Step 10
9 1. Connect a test light between the 5 Volt 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?
5V Go to Step 12 Go to Step 11