Honda CBR650RA Shop Manual page 127

dummyhead dummyhead
DTC P0122/DTC P0123
Probable cause:
• Faulty TP sensor or its related circuit
• Faulty ECM
Symptom/Fail-safe function:
• Engine operates at idle speed
1. TP Sensor Input Voltage Inspection
Disconnect the TP sensor 3P (Blue) connector
(page 7-13).
Turn the ignition switch ON.
Measure the voltage at the wire harness side TP
sensor 3P (Blue) connector [1] terminals.
CONNECTION: Yellow/red (+) – Green/orange (–)
Is about 5 V indicated?
YES
NO
2. TP Sensor Output Line Open Circuit Inspection
Turn the ignition switch OFF.
Disconnect the ECM 33P (Gray) connector (page 4-
76).
Check for continuity between the wire harness side
TP sensor 3P (Blue) connector [1] and ECM 33P
(Gray) connector [2].
CONNECTION: White/yellow – White/yellow
Is there continuity?
YES
NO
3. TP Sensor Output Line Short Circuit Inspection
Check for continuity between the wire harness side
TP sensor 3P (Blue) connector [1] and ground.
CONNECTION: White/yellow – Ground
Is there continuity?
YES
NO
– GO TO STEP 2.
– • Open or short circuit in the Yellow/red
wire
• Open circuit in the Green/orange wire
• If the wire is OK, replace the ECM with
a new one, and recheck.
– GO TO STEP 3.
– Open circuit in the White/yellow wire
– Short circuit in the White/yellow wire
– GO TO STEP 4.
PGM-FI SYSTEM
[1]
Y/R
(Terminal side of the wire harness)
[1]
W/Y
(Terminal side of the wire harness)
[1]
W/Y
(Terminal side of the wire harness)
G/O
[2]
W/Y
4-23