Honda CBR650F Service Manual page 105

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PGM-FI SYSTEM
DTC 8 (TP SENSOR)
Probable cause
• Open circuit in Yellow/red or Green/yellow wire
between the TP sensor and ECM
• Open or short circuit in Red/yellow wire between the
TP sensor and ECM
• Short circuit between Yellow/red and Red/yellow
wires
• Faulty TP sensor
• Faulty ECM
DTC 8-1 (TP SENSOR LOW VOLTAGE)
• Before starting the inspection, check for loose or
poor contact on the TP sensor 3P (Blue), ECM 33P
(Black) and 33P (Gray) connectors, and recheck the
DTC.
1. TP Sensor System Inspection
Check the TP sensor with the MCS with the throttle
fully closed.
Is about 0 V indicated?
YES
NO
2. TP Sensor Input Voltage Inspection
Turn the ignition switch OFF.
Disconnect the TP sensor 3P (Blue) connector [1].
Turn the ignition switch ON with the engine stop
switch " ".
Measure the voltage between the wire harness side
TP sensor 3P (Blue) connector terminals.
CONNECTION: Yellow/red (+) – Green/yellow (–)
STANDARD: 4.75 – 5.25 V
Is the voltage within standard value?
YES
NO
4-16
TP SENSOR
– GO TO STEP 2.
– Intermittent failure
– GO TO STEP 4.
– GO TO STEP 3.
ECM
5 V
Y/R
R/Y
G/Y
[1]
[1]
Y/R G/Y