Circuit Description
The IMRV position sensor is mounted on the valve shaft axis and is used to measure the opening angle of the IMRV. See DTC P2009: INTAKE MANIFOLD RUNNER CONTROL CIRCUIT LOW (BANK NO. 1) & DTC P2010: INTAKE MANIFOLD RUNNER CONTROL CIRCUIT HIGH (BANK NO. 1) . Since this sensor is electronically controlled with hall elements, accurate control and reliability can be obtained.
Voltage of approximately 0.6 V is applied to terminal IACA of the Engine Control Module (ECM) when the IMRV is fully closed. See Fig 1. The voltage applied to terminal IACA increases in proportion to the IMRV opening angle, approximately 3.6 V is applied to the terminal when it is fully opened.
The ECM detects a malfunction in the IMRV position sensor when it's voltage output deviates from the standard range. When a malfunction is detected, the ECM fully opens the IMRV using thee IMRV motors until the IMRV position sensor returns to normal.
The related DTCs are:
- P2004 and P2006, see DTC P2004: INTAKE MANIFOLD RUNNER CONTROL STUCK OPEN (BANK NO. 1) & DTC P2006: INTAKE MANIFOLD RUNNER CONTROL STUCK CLOSED (BANK NO. 1) .
- P2009 and P2010, see DTC P2009: INTAKE MANIFOLD RUNNER CONTROL CIRCUIT LOW (BANK NO. 1) & DTC P2010: INTAKE MANIFOLD RUNNER CONTROL CIRCUIT HIGH (BANK NO. 1) .
DTC P2014 detecting condition is when IMRV position sensor output voltage is 0.2 V or less or 4.8 V or more and continues for 0.5 second. DTC P2016 detecting condition is when IMRV position sensor output voltage is 0.2 V or less and continues for 0.5 second. DTC P2017 detecting condition is when IMRV position sensor output voltage is 4.8 V or more and continues for 0.5 second.
After confirming DTCs P2014, P2016 or P2017, use the hand-held tester or the OBD II scan tool to confirm the IACV POSITION (IMRV position sensor output voltage) from DIAGNOSIS / ENHANCED OBD II / DATA LIST / ALL. See IDENTIFYING DTCs P2014, P2016 & P2017 IACV POSITION table.
| IACV POSITION | Malfunction |
|---|---|
| 0.2 V Or Less | IACA Circuit Short Or VC Circuit Open |
| 4.8 V Or More | VC & IACA Circuit Short-Circuit, IACA Circuit Open Or E2 Circuit Open |