ENGINE CONTROLS 1F–81
DAEWOO M-150 BL2
DTC P0123 – Throttle Position Sensor High Voltage
Step Action Value(s) Yes No
1
Perform an On-Board Diagnostic (EOBD) System
Check.
Was the check performed?
–
Go to Step 2
Go to
“On-Board
Diagnostic
System Check”
2
1. Install a scan tool to the Data Link Connector
(DLC).
2. Turn the ignition ON.
Is the Throttle Position (TP) sensor voltage greater
than the specified value? 1.0 V Go to Step 4 Go to Step 3
3
1. Turn the ignition ON.
2. Review the Freeze Frame data and note the
parameters.
3. Operate the vehicle within the Freeze Frame
conditions and Conditions for Setting the DTC as
noted.
Is the TP sensor voltage greater than the specified
value? 3.9 V Go to Step 4 Go to Step 12
4
1. Turn the ignition OFF.
2. Disconnect the TP sensor connector.
3. Turn the ignition ON.
Is the TP sensor voltage less than the specified
value? 0.2 V Go to Step 5 Go to Step 6
5
Probe the TP sensor ground circuit, terminal A at the
TP sensor connector with a test light connected to
B+.
Does the test light illuminate?
–
Go to Step 7 Go to Step 9
6
Check the TP sensor signal circuit for an short to
voltage and repair as needed.
Is the repair complete?
–
Go to Step 12 Go to Step 11
7
Check the 5 volt reference circuit for a short to B+
and repair as needed.
Is the repair complete?
–
Go to Step 12 Go to Step 8
8
Check the TP sensor electric connector for a poor
connection and repair as needed.
Is the repair complete?
–
Go to Step 12 Go to Step 10
9
Check the TP sensor ground circuit for an open and
repair as needed.
Is the repair complete?
–
Go to Step 12 Go to Step 11
10
Replace the throttle body assembly.
Is the action complete?
–
Go to Step 12
–
11
1. Turn the ignition switch OFF.
2. Replace the Engine Control Module (ECM).
Is the action complete?
–
Go to Step 12
–
12
1. Using the scan tool, clear the Diagnostic Trouble
Codes (DTCs).
2. Start the engine and idle at normal operating
temperature.
3. Operate the vehicle within the Conditions for
setting this DTC as specified in the supporting
text.
Does the scan tool indicate that this diagnostic has
run and passed?
–
Go to Step 13 Go to Step 2
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