P2125
HYBRID / BATTERY CONTROL: HYBRID CONTROL SYSTEM: P2120-152-P2123-105, P2125-153-P2128-108, P2138-110, P2138-154: Throttle / Pedal Position Sensor / Switch "D" Circuit
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. There are 2 outputs from the sensor. 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 VPA 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 VPA and VPA2.
WIRING DIAGRAM
INSPECTION PROCEDURE
PROCEDURE
1. READ VALUE USING TECHSTREAM (ACCEL PEDAL POS #1, ACCEL PEDAL POS #2)
(a) Connect the Techstream to the DLC3.
(b) Turn the power switch on (IG).
(c) Enter the following menus: Powertrain / Hybrid Control / Data List / Accel Pedal Pos #1, Accel Pedal Pos #2.
(d) Read the Data List.
Result:
Text in Illustration
HINT
5 V is described as 100% on the Techstream.
(e) Turn the power switch off.
NG -- CHECK CONNECTOR CONNECTION CONDITION (ACCELERATOR PEDAL SENSOR ASSEMBLY CONNECTOR)
OK -- CHECK FOR INTERMITTENT PROBLEMS Check For Intermittent Problems
2. CHECK CONNECTOR CONNECTION CONDITION (ACCELERATOR PEDAL SENSOR ASSEMBLY CONNECTOR)
(a) Check the connection of accelerator pedal sensor assembly connector.
Text in Illustration
OK:
The connector is connected securely and there are no contact problems.
NG -- CONNECT SECURELY
OK -- Continue to next step.
3. CHECK CONNECTOR CONNECTION CONDITION (HYBRID VEHICLE CONTROL ECU CONNECTOR) P0343
NG -- CONNECT SECURELY
OK -- Continue to next step.
4. CHECK HYBRID VEHICLE CONTROL ECU (CHECK VOLTAGE)
(a) Disconnect connector from the accelerator pedal sensor assembly.
(b) Turn the power switch on (IG).
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Text in Illustration
(d) Connect the accelerator pedal sensor assembly connector.
(e) Turn the power switch off.
NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR PEDAL SENSOR)
OK -- Continue to next step.
5. CHECK HYBRID VEHICLE CONTROL ECU (CHECK RESISTANCE)
(a) Disconnect connector from the accelerator pedal sensor assembly.
(b) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Text in Illustration
(c) Connect the accelerator pedal sensor assembly connector.
NG -- CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR PEDAL SENSOR)
OK -- REPLACE ACCELERATOR PEDAL SENSOR ASSEMBLY Components
6. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR PEDAL SENSOR)
(a) Disconnect connector from the accelerator pedal sensor assembly.
(b) Disconnect connector A58 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:
Text in Illustration
NOTICE:
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):
(g) Connect the hybrid vehicle control ECU connector.
(h) Connect the accelerator pedal sensor assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components
7. CHECK HARNESS AND CONNECTOR (HYBRID VEHICLE CONTROL ECU - ACCELERATOR PEDAL SENSOR)
(a) Disconnect connector from the accelerator pedal sensor assembly.
(b) Disconnect connector A58 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:
Text in Illustration
NOTICE:
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):
(g) Connect the hybrid vehicle control ECU connector.
(h) Connect the accelerator pedal sensor assembly connector.
NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE HYBRID VEHICLE CONTROL ECU Components