Dtc 29 (Iacv) - Honda CRF1000 Shop Manual

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DTC 29 (IACV)

Probable cause
• Open or short circuit in Black/yellow, Black/orange,
Black/red, or Black/green wire between the IACV
and ECM/PCM
• Faulty IACV
• Faulty ECM/PCM
DTC 29-1 (IACV)
• Before starting the inspection, check for loose or
poor contact on the IACV 4P (Black) and ECM/PCM
33P (Black) connectors, and recheck the DTC.
1. Recheck DTC
Erase the DTC (page 4-6).
Check the DTC with the MCS.
Is the DTC 29-1 indicated?
YES
NO
2. IACV Resistance Inspection
Turn the ignition switch OFF.
Disconnect the IACV 4P (Black) connector (page 7-
16).
Measure the resistance at the IACV side 4P
connector [1].
Connection: A – D
Standard: 99 – 121 Ω (25°C/77°F)
Is the resistance within standard value?
YES
NO
IACV
– GO TO STEP 2.
– Intermittent failure
B – C
– GO TO STEP 3.
– Faulty IACV
ECM/PCM
Bl/Y
Bl/O
Bl/R
Bl/G
[1]
PGM-FI SYSTEM
A D
B
C
4-29