Honda CBR650RA Shop Manual page 140

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PGM-FI SYSTEM
DTC P0511
Probable cause:
• Faulty IACV or its related circuit
• Faulty ECM
Symptom/Fail-safe function:
• Engine stalls, hard to start, rough idling
1. IACV Line Open Circuit Inspection
Disconnect the following:
– ECM 33P (Black) connector (page 4-76)
– IACV 4P (Black) connector (page 7-18)
Check for continuity between the wire harness side
ECM 33P (Black) connector [1] and IACV 4P (Black)
connector [2] terminals.
CONNECTION:
Light green/black – Light green/black
Brown/red – Brown/red
Black/red – Black/red
Gray/red – Gray/red
Is there continuity?
YES
NO
2. IACV Line Short Circuit Inspection
Check for continuity between the wire harness side
IACV 4P (Black) connector [1] terminals and
ground.
CONNECTION:
Light green/black – Ground
Brown/red – Ground
Black/red – Ground
Gray/red – Ground
Is there continuity?
YES
NO
3. IACV Inspection
Replace the IACV with a new one.
Connect the disconnected connector(s).
Erase the DTC (page 4-9).
Turn the ignition switch ON and wait for 10 seconds.
Check the DTC with GST or MCS.
Is same DTC indicated?
YES
NO
4-36
– GO TO STEP 2.
– • Open circuit in Light green/black or
Brown/red wire
• Open circuit in Black/red or Gray/red
wire
– • Short circuit in Light green/black or
Brown/red wire
• Short circuit in Black/red or Gray/red
wire
– GO TO STEP 3.
– Replace the ECM with a new one, and
recheck.
– Faulty original IACV
Lg/Bl
Br/R
Bl/R
[1]
Gr/R
(Terminal side of the wire harness)
[1]
Lg/Bl
Br/R Bl/R
(Terminal side of the wire harness)
[2]
Lg/Bl
Br/R
Bl/R
Gr/R
Gr/R