Note. For connector terminal ID, see CONNECTOR IDENTIFICATION . For wiring diagram, see WIRING DIAGRAMS article.
Note. Manifold Absolute Pressure (MAP) sensor voltage is monitored when battery voltage is more than 10.4 volts. DTC may be stored in Powertrain Control Module (PCM) if MAP sensor voltage is less than 2.35 volts with ignition off for 5 seconds. Possible causes are: defective MAP sensor, defective PCM, or defective connectors or wiring.
- Turn ignition on with engine off. Using scan tool, check for DTCs. If DTC SPECIFIC GOOD TRIP counter is displayed and equal to zero, go to next step. If DTC SPECIFIC GOOD TRIP counter is not displayed and equal to zero. Go to step 4.
- Turn ignition off. Disconnect MAP sensor connector. On 4.7L, MAP sensor is located on front of intake manifold. (Схема №55) On 5.2L and 5.9L, MAP sensor is located on side of throttle body. (Схема №56) On all models, turn ignition on with engine off. Using voltmeter, check voltage at Violet/White wire on MAP sensor connector. If voltage is 4.5 volts or less, go to next step. If voltage is more than 4.5 volts, replace MAP sensor. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).
- Turn ignition off. Disconnect PCM connectors. PCM is located at passenger's side front corner of engine compartment on inner fender panel. Ensure MAP sensor connector is still disconnected. Using ohmmeter, check resistance between Violet/White wire on MAP sensor connector and terminal No. 17 (Violet/White wire) on PCM connector C1. If resistance is less than 5 ohms, replace PCM. Perform «TEST VER-5»(ref-9482-S35719050532000102700000). If resistance is 5 ohms or more, repair open on Violet/White wire between MAP sensor and PCM. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).
- Turn ignition off. Inspect wiring harness and connectors between PCM and MAP sensor. PCM is located at passenger's side front corner of engine compartment on inner fender panel. On 4.7L, MAP sensor is located on front of intake manifold. (Схема №55) On 5.2L and 5.9L, MAP sensor is located on side of throttle body. (Схема №56) On all models, if no problems exist, go to next step. If any problems exist, repair wiring or connectors as necessary. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).
- Start engine and allow engine to idle. Using scan tool, monitor MAP sensor voltage while wiggling wiring harness and connectors between MAP sensor and PCM. If MAP sensor voltage does not change while wiggling wiring harness and connectors, test is complete. If MAP sensor voltage changes while wiggling wiring harness and connectors, repair wiring or connectors as necessary that caused the voltage to change. Perform «TEST VER-5»(ref-9482-S35719050532000102700000).