P2123
L110 HYBRID VEHICLE CONTROL: HYBRID CONTROL SYSTEM: P2120-152: Throttle / Pedal Position Sensor / Switch "D" Circuit
DTC P2120-152 - Throttle / Pedal Position Sensor / Switch "D" Circuit
DTC P2121-106 - Throttle / Pedal Position Sensor / Switch "D" Circuit Range / Performance
DTC P2122-104 - Throttle / Pedal Position Sensor / Switch "D" Circuit Low Input
DTC P2123-105 - Throttle / Pedal Position Sensor / Switch "D" Circuit High Input
DTC P2125-153 - Throttle / Pedal Position Sensor / Switch "E" Circuit
DTC P2126-109 - Throttle / Pedal Position Sensor / Switch "E" Circuit Range / Performance
DTC P2127-107 - Throttle / Pedal Position Sensor / Switch "E" Circuit Low Input
DTC P2128-108 - Throttle / Pedal Position Sensor / Switch "E" Circuit High Input
DTC P2138-110 - Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation
DTC P2138-154 - Throttle / Pedal Position Sensor / Switch "D" / "E" Voltage Correlation
DESCRIPTION
The accelerator pedal position sensor is mounted on the accelerator pedal to detect how much the pedal is depressed. This is a non-contact sensor with hall elements. It has 2 sensors per sensor unit. One is used to detect the accelerator pedal position and the other is used as a confirmation to allow the detection of a malfunction in the sensor itself. Voltage is output from the accelerator pedal position sensor to terminals VPA1 and VPA2 of the hybrid vehicle control ECU. This voltage varies from 0 to 5 V in accordance with the accelerator pedal position. Terminal VPA2 is primarily used to detect a malfunction in the sensor itself. The hybrid vehicle control ECU determines the current accelerator pedal position and controls the hybrid control system based on signals received by terminals VPA1 and VPA2.
WIRING DIAGRAM
INSPECTION PROCEDURE
CAUTION:
- Before inspecting the high-voltage system or disconnecting the low voltage connector of the inverter with converter assembly, take safety precautions such as wearing insulated gloves and removing the service plug grip to prevent electrical shocks. After removing the service plug grip, put it in your pocket to prevent other technicians from accidentally reconnecting it while you are working on the high-voltage system.
- After disconnecting the service plug grip, wait for at least 10 minutes before touching any of the high-voltage connectors or terminals. After waiting, check the voltage at the inspection point in the inverter with converter assembly. The voltage should be 0 V before beginning work.
HINT: Waiting for at least 10 minutes is required to discharge the high-voltage capacitor inside the inverter with converter assembly.
PROCEDURE
1. READ VALUE USING TECHSTREAM
(a) Turn the power switch on (IG).
(b) Select the following menu items: Powertrain / Hybrid Control / Data List / Accel Pedal Pos #1and Accel Pedal Pos #2.
(c) Read the data list.
HINT: 5 V is described as 100% on the tester.
Result:
OK -- CHECK FOR INTERMITTENT PROBLEMS
NG -- Continue to next step.
2. CHECK HYBRID VEHICLE CONTROL ECU
(a) Disconnect the accelerator link rod assembly connector.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR LINK ROD ASSEMBLY)
OK -- Continue to next step.
3. CHECK HYBRID VEHICLE CONTROL ECU
(a) Turn the power switch off.
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
OK -- REPLACE ACCELERATOR LINK ROD ASSEMBLY
NG -- Continue to next step.
4. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR LINK ROD ASSEMBLY)
(a) Turn the power switch off.
(b) Disconnect connector A54 from the hybrid vehicle control ECU.
(c) Turn the power switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTE: Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the power switch off.
(f) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU
5. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR LINK ROD ASSEMBLY)
(a) Turn the power switch off.
(b) Disconnect connector A54 from the hybrid vehicle control ECU.
(c) Turn the power switch on (IG).
(d) Measure the voltage according to the value(s) in the table below.
Standard voltage:
NOTE: Turning the power switch on (IG) with the hybrid vehicle control ECU connector disconnected causes other DTCs to be stored. Clear the DTCs after performing this inspection.
(e) Turn the power switch off.
(f) Measure the resistance according to the value(s) in the table below.
Standard resistance (Check for open):
Standard resistance (Check for short):
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU