02-20-2018, 09:23 AM
Max, thank you for posting the photos of the IACV on my 2014 standard.
Popgun, thank you for info from FSM pages 5-41 and 5-42
Below are a condensation of those pages:
Note: These tests may be done with IACV mounted, by lifting rear of fuel tank and removing right side throttle body cover.
1. After clearing stored DTC, per page 5-14, recheck for stored DTC 29-1. If none, then prior DTC was intermittent.
2. Measure resistance of each of the four wires at the ICAV connector (disconnected, harness side, not IACV side). Continuity to ground should be infinity. If not, the wiring harness has a short to ground.
3. Check continuity to ECM, from disconnected ECM 33 pin connector to disconnected IACV 4 pin connector
Positions are numbered with locking tab up:
ECM A6 black/yellow to IACV connector postion 1 (left)
A17 black/red, position 2
A16 black/blue, position 3
A7 black/orange, position 4 (right)
4. Measure IACV resistance, (IACV side, disconnected), facing with locking tab up at airbox side (mirror image of connector):
position 4 black/yellow (right)
position 3, black/red
postion 2, black/blue
position 1, black orange (left)
a. black/yellow to black orange (2 outside positions), 99-121 ohms at 77F/25C
b. black/red to black/blue (2 inside positions), 99-121 ohms at 77F/25C
If resistance out of spec, FSM declares IACV faulty
My 2 cents: If IACV and wiring tests good, then if symptoms point to IACV, it may be a piston travel issue or air port issue.
Popgun, thank you for info from FSM pages 5-41 and 5-42
Below are a condensation of those pages:
Note: These tests may be done with IACV mounted, by lifting rear of fuel tank and removing right side throttle body cover.
1. After clearing stored DTC, per page 5-14, recheck for stored DTC 29-1. If none, then prior DTC was intermittent.
2. Measure resistance of each of the four wires at the ICAV connector (disconnected, harness side, not IACV side). Continuity to ground should be infinity. If not, the wiring harness has a short to ground.
3. Check continuity to ECM, from disconnected ECM 33 pin connector to disconnected IACV 4 pin connector
Positions are numbered with locking tab up:
ECM A6 black/yellow to IACV connector postion 1 (left)
A17 black/red, position 2
A16 black/blue, position 3
A7 black/orange, position 4 (right)
4. Measure IACV resistance, (IACV side, disconnected), facing with locking tab up at airbox side (mirror image of connector):
position 4 black/yellow (right)
position 3, black/red
postion 2, black/blue
position 1, black orange (left)
a. black/yellow to black orange (2 outside positions), 99-121 ohms at 77F/25C
b. black/red to black/blue (2 inside positions), 99-121 ohms at 77F/25C
If resistance out of spec, FSM declares IACV faulty
My 2 cents: If IACV and wiring tests good, then if symptoms point to IACV, it may be a piston travel issue or air port issue.