DTC P0020:00 [MZI-3.7]

id0102d2310900

DTC P0020:00 | OCV (LH) circuit open
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DETECTION CONDITION | • The PCM monitors the OCV (LH) circuit to the PCM for high and low voltage. The test fails if the voltage exceeds or falls below a calibrated limit for a calibrated amount of time.
POSSIBLE CAUSE | • Connector or terminal malfunction • OCV (LH) malfunction • Open circuit between OCV (LH) terminal A and main relay No.1 terminal D • Short to power supply between OCV (LH) terminal B and PCM terminal 2BK • Short to ground circuit between OCV (LH) terminal B and PCM terminal 2BK • Open circuit between OCV (LH) terminal B and PCM terminal 2BK

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED SERVICE INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to the available Service Information. • If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT OCV (LH) CONNECTOR FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the OCV (LH) connector. • Inspect for poor connection (such as damaged/pulled-out pins, corrosion). • Are there any malfunction? | Yes | Repair or replace suspected part, then go to Step 10.
No | Go to the next step.
4 | INSPECT OCV (LH) • Inspect the OCV (LH). (See OIL CONTROL VALVE (OCV) INSPECTION [MZI-3.7].) • Is there any malfunction? | Yes | Replace the OCV (LH), then go to Step 10. (See OIL CONTROL VALVE (OCV) REMOVAL/INSTALLATION [MZI-3.7].)
No | Go to the next step.
5 | INSPECT OCV (LH) CIRCUIT FOR OPEN CIRCUIT • OCV (LH) connector is disconnected. • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between the OCV (LH) connector terminal A (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Go to the next step.
No | Repair or replace suspected part, then go to Step 10.
6 | INSPECT OCV (LH) CIRCUIT FOR SHORT TO POWER SUPPLY • OCV (LH) connector is disconnected. • Turn the ignition switch off. • Disconnect the PCM connector. • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between the OCV (LH) connector terminal B (wiring harness-side) and body ground. • Is the voltage B+? | Yes | Repair or replace suspected part, then go to Step 10.
No | Go to the next step.
7 | INSPECT OCV (LH) CIRCUIT FOR SHORT TO GROUND • OCV (LH) and PCM connectors are disconnected. • Turn the ignition switch off. • Inspect for continuity between OCV (LH) terminal B (wiring harness-side) and body ground. • Is there continuity? | Yes | Repair or replace suspected part, then go to Step 10.
No | Go to the next step.
8 | INSPECT PCM CONNECTOR FOR POOR CONNECTION • Inspect for poor connection (such as damaged/ pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair or replace suspected part, then go to Step 10.
No | Go to the next step.
9 | INSPECT OCV (LH) CIRCUIT FOR OPEN CIRCUIT • OCV (LH) and PCM connectors are disconnected. • Turn the ignition switch off. • Measure the resistance between the OCV (LH) connector terminal B (wiring harness-side) and PCM terminal 2BK (wiring harness-side). • Is there continuity? | Yes | Go to the next step.
No | Repair or replace suspected part, Then go to the next step.
10 | VERIFY TROUBLESHOOTING OF DTC P0020:00 HAS BEEN COMPLETED • Verify that all disconnected connectors reconnected. • Turn the ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the M-MDS. • Start the engine and run it at idle. • Retrieve DTCs using the M-MDS. • Is the PENDING CODE for this DTC present? | Yes | Repeat the inspection from Step 1. • If the malfunction recurs, replace the PCM. (See PCM REMOVAL/INSTALLATION [MZI-3.7].) Go to the next step.
No | Go to the next step.
11 | VERIFY AFTER REPAIR PROCEDURE • Perform the “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
No | Troubleshooting completed.