Acura Integra 1998 Service Manual page 268

The scan tool indicates Diagnostic Trouble Code (DTC) P0122: A low voltage problem in the Throttle Position
{TP) sensor circuil.
The TP Sensor is a potentiometer. lt is connected to the throttle valve shaft. As the throttle position changes, the throttle
position sensor varies the voltage signalto the ECM.
ARUSH
HOI.DER
BRUSH
5
FULL
THROTTLE
TP SENSOR CONNECTOR IC115)
Wire side of temale terminals
ECM CONNECTOR D {16P)
(GRN/BLUI
Wire side ot female terminals
s G 2 /
- \
fr
rrr
r
'tr\
-
1 2 3 \ )
| { - f - /
| \t_-,/
t l
I /6\ I TPS
-\j/
Terminalside of male
termrnats
(To page 11-64)
The MIL has be€n reDort€d on.
DTC P0122 is stor€d.
Problem veritication:
1 . S t a r t t h e e n g i n e . H o l d t h e
engine at 3,000 rpm with no
load (in Park or neutral) until
the radiator fan comes on, then
turn the ignition switch OFF.
2. Turn the ignition switch ON (ll).
3 . C h e c k t h e t h r o t t l e p o s i t i o n
with the scan tool.
ls there approx. 10% when
the throttle is fully closed
and approx.90o/o
when the
throttle is fully opened?
lntermittenl tailure, system is OK
at this time. Check tor poor con-
nections or loose wires at Cl15
{TP s€nsor) end ECM.
Check lor an open in ihe wire
(VCC2line):
1. Turn the ignition switch OFF.
2. Disconnect the TP sensor con,
nector,
3. Turn the ignition switch ON (ll).
4 . M e a s u r e v o l t a g e b e t w e e n
TP sensor connector terminals
No. l and No. 3.
ls there approx. 5 V7
Check fo. an open in wire IVCC2
line):
lleasure voltage between ECM
connector terminals D10 and D11.
R.p.ir opon in tho wire betwoen
ECM {D101 and TP sen3or.
ls there approx. 5 V?
Substitute a known-good ECM
and recheck. lf pr6sc.ibed volt-
age ia now available, replaco the
originalECM.
Check for an open or 3hort in TP
3ensor:
1. Turn the ignition switch OFF.
2. Measure resistance between
TP sensor terminals No. '1 and
N o . 2 w i t h t h e t h r o t t l e f u l l y
ctoseo,
OUTPUT VOLTAGE {V)
4
RESISTOR
3
2
TERMINAL
I
o
THROTTLE
OPEI{ING
BUS}IING
IDLE
sG2
{GRN/BLK)
vcc2
IYEL/BLU}
vcc2
{YEL/BI
l \ e
4 E
i2
iRN,
. l l L I
5
6
/ 1 0 1 t
1 2
t 5
1 5
(cont'd)