DTC P2102 or P2103 (LPL or LPV)
Diagnostic Instructions
DTC Descriptors
| DTC P2102 00: Throttle Actuator Control (TAC)
Motor Control Circuit Low Voltage |
| DTC P2103 00: Throttle Actuator Control (TAC)
Motor Control Circuit High Voltage |
Diagnostic Fault Information
Circuit
|
Short to Ground
|
Open/High Resistance
|
Short to Voltage
|
Signal Performance
|
B+
|
P2102 00
|
P2102 00
|
-
|
-
|
Control
|
P2102 00
|
P2102 00
|
P2103 00
|
-
|
|
| |
Circuit/System Description
A throttle plate actuator is used to achieve high exhaust gas
recirculation rates. It increases the pressure difference between
exhaust and intake so that the appropriate exhaust quantity can be
mixed with the intake air. The engine control module (ECM)
transmits the desired angle as a PWM signal to the throttle plate
actuator. The throttle plate actuator operates the DC motor to
control the throttle plate based on the PWM signal from the ECM.
The throttle plate position is monitored by an internal position
sensor.
Conditions for Running the DTC
| • |
The ignition is ON, or the
engine is running. |
| • |
The throttle actuator motor is
commanded ON or OFF. |
| • |
The ignition voltage is less
than 16 V. |
| • |
The DTCs run continuously when
the above conditions are met. |
Conditions for Setting the DTC
The ECM detects an open, short to ground, or a short to voltage
on the throttle actuator control circuit for greater than 1 s.
Action Taken When the DTC Sets
DTC P2102 and P2103 are Type A DTCs.
Conditions for Clearing the DTC
DTC P2102 and P2103 are Type A DTCs.
Reference Information
Schematic Reference
Engine Controls Schematics
Connector End View Reference
Component Connector End Views
Electrical Information Reference
DTC Type Reference
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Scan Tool Reference
Control Module References for scan tool information
Circuit/System Verification
| 1. |
Ignition ON, command the Q38
Throttle Body ON and OFF with a scan tool. The throttle blade
should respond to the scan tool commands. |
| 2. |
Observe the scan tool DTC
information parameter. DTC P2102 or P2103 should not set.
|
| 3. |
Operate the vehicle within the
Conditions for Running the DTC to verify the DTC does not reset.
You may also operate the vehicle within the conditions that you
observed from the Freeze Frame/Failure Records data. |
Circuit/System Testing
| 1. |
Ignition OFF, disconnect the
harness connector at the Q38 Throttle Body. |
| 2. |
Ignition ON, verify a test
lamp illuminates between the ignition circuit terminal 4 and
ground. |
| ⇒ |
If the test lamp is OFF, test the ignition circuit
for a short to ground or an open/high resistance. |
| 3. |
Ignition ON, test for less
than 0.3 V between control circuit terminal 2 and ground.
|
| ⇒ |
If greater than specified value, test for the
control circuit for a short to voltage. If the circuit tests
normal, replace the K20 Engine Control Module. |
| 4. |
Ignition OFF, test for greater
than 500 kΩ between control circuit terminal 2 and
earth. |
| ⇒ |
If less than the specified value, test the control
circuit for a short to ground or an open/high resistance. If the
circuit tests normal, replace the K20 Engine Control Module. |
| 5. |
Ignition ON, test for greater
than 11 V between terminal 2 and battery voltage B+. |
| ⇒ |
If less than specified value, test for an open
circuit. If the circuit tests normal, replace the K20 Engine
Control Module. |
| 6. |
If all circuits test normal,
test or replace the Q38 Throttle Body. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
