Honda CR-V 1997 Service Manual page 309

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P0123
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The scan tool indicates Diagnostic Trouble Code (DTC) P0123: A high voltage problem in the Throttle Position
(TP)
sensor circuit.
- The MIL has been reported on.
- OTC P0123
is stored.
Problem verification:
I.
Start the engine. Hold the
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
(II).
3. Check the throttle position
with the scan tool.
Is there approx. 10% when the
YES
Intermittent failure, system is OK
throttle is fully closed and
at this tima. Check for poor con-
TP SENSOR 3P CONNECTOR ICI301
approx. 90% when the throttle
nactions or loose wires at
e130
is fully opened? ITP sensor) ond
at the
ECM/PCM.
NO
SG2 VCCZ
IGRN/BLKI 'r-,-L_L,-/IYEL/BLU)
Check for an open in the TP sen-
sor:
1. Turn the ignition switch OFF.
2. Disconnect the TP sensor 3P
connector.
3. Turn the ignition switch ON
(II).
Wire side of female terminals
4. At the wire harness side, mea·
sure voltage between the TP
sensor 3P connector terminals
No.1 and No.3.
"-
YES
Is there approx. 5 V?
./
Replece the throttle body .
NO
('97 model)
. -
_._._._._-
._.-
_._._--
-
_._-------_ .-._._,_._._.- .-._.
PCM
CONNECTOR D 116P)
Check for an open in the wire
(SG2Iine):
Measure voltage between PCM
connector terminals Dl0 and Dl1.
,,-
234
151
V 7 8 V 1011 12 I
13141V
rE
VCCZIYELI
SG2 (GRN/BLKI
YES Repair open in the wire between
"-
Is there approx. 5 V?
./
the PCM (011) and the TP sen-
BLUI
Ifv"'
\6J
sor.
NO
Wire side of female terminals
._._._._._._.- -_.-
- -------_._ -- ----_ .-
_._ .- .-.-.-.-._._.
(To page 11-108)
(cont'd)
11-107