DTC P1289: Manifold Tune Valve Solenoid Circuit: Testing
NOTE:
Manifold tune valve solenoid may also be referred to as manifold tune valve.
- Turn ignition on. Using scan tool, read DTCs. If GLOBAL GOOD TRIP counter is displayed and displayed count is "0", go to next step. If GLOBAL GOOD TRIP counter is not displayed or displayed count is not "0", go to step 9.
- Turn ignition off. Disconnect Manifold Turn Valve (MTV) 2-pin connector. MTV is located in front of intake manifold. Turn ignition on. Using scan tool, actuate MTV. Measure voltage between ground and Dark Green/Light Green wire at MTV harness connector. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, go to step 7.
- Using a test light connected to Violet/Red wire at MTV harness connector, probe Dark Green/Light Green wire at MTV harness connector. Using scan tool, actuate MTV and observe test light. If test light does not flash on and off, go to next step. If test light flashes on and off, replace MTV.
- Turn ignition off. Disconnect PCM connectors. PCM is located on left side of engine compartment, between Power Distribution Center (PDC) and Transmission Control Module (TCM). See Figure. Inspect connectors for damaged pins, corrosion and loose terminals. Repair connectors as necessary. If connectors are okay, measure resistance of Violet/Red wire between MTV harness connector and terminal No. 39 at PCM C1 harness connector. See Figure. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Violet/Red wire.
- Measure resistance between ground and terminal No. 39 (Violet/Red wire) at PCM C1 harness connector. If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair short to ground in Violet/Red wire.
- At this time, PCM is assumed to be defective. Replace PCM.
- Turn ignition off. Remove Auto Shutdown (ASD) relay from PDC. Measure resistance of Dark Green/Light Green wire between MTV harness connector and terminal "D" at ASD relay socket in PDC. See Fig 1. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open in Dark Green/Light Green wire between ASD relay and MTV. Dark Green/Light Green wire changes to Dark Green/Orange wire between ASD relay socket and fuse "S" in power distribution center. Repair wiring as necessary.
- Turn ignition off. Remove and inspect fuse "S" (20-amp) in PDC. If fuse is okay, go to next step. If fuse is blown, repair short to ground in Dark Green/Light green wire between MTV and PDC. Install new fuse.
- At this time, one or both coil capacitors are assumed to be defective. One capacitor is mounted to side of each valve cover. Coil capacitor is used for radio noise suppression. Replace coil capacitor(s) as necessary.
- At this time, conditions required to set DTC are not present. Turn ignition off. Visually inspect related connectors and wiring harness for damage. Repair connectors and wiring harness as necessary. If connectors and wiring harness are okay, test is complete. Check for any related technical service bulletins that may apply.