Mechanics

HYUNDAI ACCENT TERMINAL PROBLEM

2002 Hyundai Accent • 138,000 miles

Hi

I had a CEL go on, I checked the codes they are p1505/p1507-what do these indicate-what may the possible fixes are-can I wait to repair 1-2 mths?
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Guest
December 15, 2012.




These are faults with the Idle Solenoid control valves. Check the connectors for looseness or contaminations before proceeding with diagnostics.

This problem would not affect others except the fuel economy and idling speed.

DTC P1505 & DTC P1507

NOTE: Testing individual components does not isolate shorts or opens. Perform all voltage tests using a Digital Volt-Ohm Meter (DVOM) with a minimum 10-megohm input impedance, unless stated otherwise in test procedure. Use ohmmeter to isolate wiring harness shorts or opens.

Code Definition

l DTC P1505: Idle Speed Control Actuator Opening Circuit Open
l DTC P1507: Idle Speed Control Actuator Closing Circuit Open

System Description

Idle Speed Control (ISC) actuator has two coils that are driven by separate ECM driver stages. Depending on pulse duty factor, equilibrium of magnetic forces of two coils will result in different directions for magnetic forces of two coils which will result in different positions for actuator. In parallel to throttle valve, a bypass hose line is arranged where ISC actuator is inserted.

Failure Conditions (P1505) ECM will set DTC P1505 and illuminate MIL if ISC actuator opening coil driver stage is open or shorted to ground during 2 drive cycles.

Failure Conditions (P1507) ECM will set DTC P1507 and illuminate MIL if ISC actuator closing coil driver stage is open or shorted to ground during 2 drive cycles.

Test Procedures

1. Turn ignition off. Connect Hi-Scan Pro tool or equivalent to OBD-II Data Link Connector (DLC). Turn ignition on. Monitor and verify DTCs
P1505 and P1507 are set, go to next step.
2. Turn ignition off. Disconnect ISC actuator 3-pin harness connector. See Fig. 17. Turn ignition on. Measure voltage between ground and ISC valve connector terminal No. 2 (Green wire). Voltage should be battery voltage. If battery voltage is as specified, go to next step. If voltage is not as specified, repair open or short circuit (in Green wire) between ISC actuator and engine control relay. After repair go to step 7.

3. Turn ignition off. With ISC actuator 3-pin harness connector disconnect. Disconnect ECM 81-pin harness connector. Measure resistance
between ISC actuator connector terminal No. 1 and ECM connector terminal No. 26 (Yellow wire). Also measure resistance between ISC actuator connector terminal No. 3 and ECM connector terminal No. 29 (Brown wire). Both resistances should be one ohm or less. If resistances are as specified, go to next step. If any resistance is not as specified, repair open or short circuit (in Yellow wire) or (in Brown wire) between ISC actuator and ECM. After repair go to step 7.

4. With ECM and ISC actuator harness connector disconnect. Measure resistance between ground and ISC valve connector terminals No. 1 (Brown wire) and No. 3 (Brown wire). Both resistance should be infinity. If resistances are as specified, go to next step. If any resistance is not as specified, repair short circuit (in Yellow wire) or (in Brown wire) between ISC actuator and ECM. After repair go to step 7.

5. Turn ignition off. With ISC valve harness connector disconnect. Measure resistance between ISC valve connector terminal No. 1 and 2, also between terminals No. 2 and 3 (component side). Both resistance should be 10-14 ohms. If resistances are as specified, go to next step. If any resistance is not as specified, replace ISC valve with known-good component. After repair go to step 7.

6. Verify than ISC valve and ECM connectors are secure. If connectors are okay, replace ISC valve with known-good component. If after sensor replacement problem persists, replace ECM and go to next step.

7. Return vehicle to original condition. Clear codes using Hi-Scan Pro tool or equivalent. Verify repairs by driving vehicle and monitoring for pending codes. If DTC is set during test drive, follow appropriate DTC test procedure.


KHLow2008
Dec 16, 2012.


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