Toyota 2GR-FE Manual page 500

ES–344
DTC No.
P2138
HINT:
When any of these DTCs are set, check the APP sensor voltage by entering the following menus on the
intelligent tester: DIAGNOSIS / ENHANCED OBD II / DATA LIST / PRIMARY / ACCEL POS #1 and
ACCEL POS #2.
Trouble Areas
VCP circuit open
Open or ground short in VPA
circuit
ES
Open or ground short in VPA2
circuit
EPA circuit open
Normal condition
HINT:
• Accelerator pedal positions are expressed as voltages.
• AP denotes Accelerator Pedal.
MONITOR DESCRIPTION
When either of the output voltages of VPA or VPA2 deviates from the standard range, or the difference
between the output voltages of the 2 sensor circuits is less than the threshold, the ECM determines that
there is a malfunction in the APP sensor. The ECM then illuminates the MIL and sets a DTC.
Example:
When the output voltage of VPA drops below 0.4 V for more than 0.5 seconds when the accelerator
pedal is fully depressed, DTC P2122 is set.
If the malfunction is not repaired successfully, a DTC is set 2 seconds after the engine is next
started.
MONITOR STRATEGY
Related DTCs
Required Sensors/Components (Main)
Required Sensors/Components (Sub)
Frequency of Operation
Duration
MIL Operation
Sequence of Operation
2GR-FE ENGINE CONTROL SYSTEM – SFI SYSTEM
DTC Detection Condition
Condition (a) or (b) continues for 2.0 seconds or more
(1 trip detection logic):
(a) Difference between VPA and VPA2 is 0.02 V or less
(b) VPA is 0.4 V or less and VPA2 1.2 V or less
ACCEL POS #1
When AP
When AP Released
Released
0 to 0.4 V
0 to 0.4 V
0.5 to 1.1 V
4.5 to 5.0 V
0.5 to 1.1 V
• Short between VPA and VPA2 circuits
• APP sensor
• ECM
ACCEL POS #2 ACCEL POS #1
When AP Depressed
0 to 1.2 V 0 to 0.4 V
1.2 to 2.0 V 0 to 0.4 V
0 to 0.2 V 2.6 to 4.5 V
4.5 to 5.0 V 4.5 to 5.0 V
1.2 to 2.0 V 2.6 to 4.5 V
P2120: Accelerator Pedal Position (APP) sensor 1 range check
(fluctuating)
P2122: APP sensor 1 range check (low voltage)
P2123: APP sensor 1 range check (high voltage)
P2125: APP sensor 2 range check (fluctuating)
P2127: APP sensor 2 range check (low voltage)
P2128: APP sensor 2 range check (high voltage)
P2138: APP sensor range check (correlation)
APP sensor
-
Continuous
Accelerator Pedal Position (APP) sensor 1 range check (fluctuating):
0.5 seconds
APP sensor 1 range check (low voltage): 0.5 seconds
APP sensor 1 range check (high voltage): 2 seconds
APP sensor 2 range check (fluctuating): 0.5 seconds
APP sensor 2 range check (low voltage): 0.5 seconds
APP sensor 2 range check (high voltage): 2 seconds
APP sensor range check (correlation): 2 seconds
Immediate
None
Trouble Area
ACCEL POS #2
When AP Depressed
0 to 1.2 V
3.4 to 5.0 V
0 to 0.2 V
4.5 to 5.0 V
3.4 to 5.0 V