Note. For connector terminal identification, see CONNECTOR IDENTIFICATION . For circuit identification and wiring diagram, see RAM VAN & RAM WAGON wiring diagram in WIRING DIAGRAMS article.
Note. DTC P1495: LEAK DETECTION PUMP SOLENOID CIRCUIT is monitored with ignition on and battery voltage more than 10.4 volts. DTC may be stored in Powertrain Control Module (PCM) when PCM senses state of Leak Detection Pump (LDP) solenoid does not change. Possible causes are: defective LDP, defective PCM, defective LDP solenoid, defective connectors or defective wiring.
- Turn ignition on, with engine off. Using scan tool, read DTCs. If DTC SPECIFIC GOOD TRIP COUNTER is displayed and displayed count is "0", go to step 4). If DTC SPECIFIC GOOD TRIP COUNTER is not displayed or displayed count is not "0", go to next step.
- Determine if DTC matches FREEZE FRAME DTC. If DTC is equal to FREEZE FRAME DTC, go to next step. If DTC is not equal to FREEZE FRAME DTC, repair DTC using FREEZE FRAME data.
- Using scan tool, read and record FREEZE FRAME data. Road test vehicle to try to duplicate FREEZE FRAME data conditions. If DTC SPECIFIC GOOD TRIP COUNTER is displayed and displayed count is "0", go to next step. If DTC SPECIFIC GOOD TRIP COUNTER is not displayed or displayed count is not "0", go to step 9).
- Turn ignition off. Disconnect LDP connector. LDP is located on a bracket mounted to right front inner fender, near battery. Clean and/or repair connector as necessary. Turn ignition on, with engine off. Using a voltmeter, check voltage on ASD relay connector, fused ignition switch output circuit (Light Green/Black wire). ASD relay is located in Power Distribution Center (PDC). PDC is located next to battery. Refer to label under PDC cover for relay location. If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, repair open fused ignition switch output circuit. Perform TEST VER-5A.
- Turn ignition off. Ensure LDP connector is still disconnected. Disconnect PCM connectors. PCM is located in engine compartment. See PCM LOCATION table under SYSTEM DIAGNOSTICS. Clean and/or repair connectors as necessary. Turn ignition on, with engine off. Using a voltmeter, check voltage on PCM connector, LDP control circuit (White/Dark Green wire). If voltage is more than 10 volts, go to next step. If voltage is 10 volts or less, replace LDP. Perform TEST VER-5A.
- Turn ignition off. Ensure LDP connector is still disconnected. Ensure PCM connectors are still disconnected. Using an ohmmeter, check resistance between ground and PCM connector, LDP control circuit (White/Dark Green wire). If resistance is 5 ohms or more, go to next step. If resistance is less than 5 ohms, repair LDP control circuit for short to ground. Perform TEST VER-5A.
- Ensure ignition is off. Ensure LDP connector is still disconnected. Ensure PCM connectors are still disconnected. Using ohmmeter, check resistance of LDP control circuit (White/Dark Green wire) between LDP and PCM. If resistance is less than 5 ohms, go to next step. If resistance is 5 ohms or more, repair open LDP control circuit. Perform TEST VER-5A.
- At this time PCM is assumed to be defective. Replace PCM. Perform TEST VER-5A.
- Turn ignition on, with engine off. Using scan tool, actuate LDP solenoid. LDP solenoid is built into LDP. LDP is located on a bracket mounted to right front inner fender, near battery. While wiggling LDP wiring harness from LDP solenoid to PCM, listen to LDP solenoid. If solenoid stops or starts clicking, repair wiring harness where wiggling caused solenoid to stop or start clicking. Perform TEST VER-5A. If solenoid does not stop or start clicking, go to next step.
- Turn ignition off. Visually inspect related connectors and wiring harness. Repair connectors and wiring harness as necessary. Perform TEST VER-5A. If connectors and wiring harness are okay, go to next step.
- At this time, problem is assumed to be intermittent or inactive. See «INACTIVE DTC CONDITION»(ref-139160-S32382818132002042600000) . Test is complete.