DTC P0053:00, P0059:00 [MZI-3.7]

id0102d2322300

DTC P0053:00 DTC P0059:00 | P0053:00: A/F sensor (RH) heater resistance P0059:00: A/F sensor (LH) heater resistance
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DETECTION CONDITION | • P0053:00 indicates A/F sensor (RH) heater resistance. • P0059:00 indicates A/F sensor (LH) heater resistance. • Heater current requirements too low or high in the A/F sensor heater control circuit.
POSSIBLE CAUSE | • Open circuit between A/F sensor terminal C and main relay No.1 terminal D • Damaged ENG BAR fuse • Short to ground between A/F sensor (RH/LH) terminal C and ENG BAR fuse • P0053:00: ― Open circuit in wiring harness between A/F sensor (RH) terminal E and PCM terminal 2J ― Short to ground in wiring harness between A/F sensor (RH) terminal E and PCM terminal 2J • P0059:00: ― Open circuit in wiring harness between A/F sensor (LH) terminal E and PCM terminal 2E ― Short to ground in wiring harness between A/F sensor (LH) terminal E and PCM terminal 2E • A/F sensor heater circuits are shorted to each other • A/F sensor heater malfunction • PCM malfunction

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 FOR POWER SUPPLY IN WIRING HARNESS • Turn the ignition switch off. • Disconnect the A/F sensor connector. • Turn the ignition switch to the ON position (engine off). • Measure the voltage between suspect A/F sensor wiring harness-side connector terminal C and ground. • Is the voltage greater than 10 V? | Yes | Turn the ignition switch off. Go to the next step.
No | Inspect the ENG BAR fuse. • If there is fuse deterioration, replace the fuse. • If the fuse has melted, repair for short to ground and replace the fuse. • If the fuse is normal, repair an open circuit. Go to Step 9.
4 | INSPECT A/F SENSOR HEATER CIRCUIT FOR OPEN CIRCUIT IN WIRING HARNESS • A/F sensor connector is disconnected. • Turn the ignition switch off. • Disconnect the PCM connector. • Measure the resistance between the following terminals (wiring harness-side): ― P0053:00: • A/F sensor (RH) terminal E—PCM terminal 2J ― P0059:00: • A/F sensor (LH) terminal E—PCM terminal 2E • Is the resistance less than 5 ohm? | Yes | Go to the next step.
No | Repair for an open circuit, then go to Step 9.
5 | INSPECT A/F SENSOR HEATER CIRCUIT FOR SHORT CIRCUIT TO GROUND • A/F sensor and PCM connectors are disconnected. • Measure the resistance between suspect A/F sensor wiring harness-side connector terminal E and body ground. • Is the resistance greater than 10 kilohms? | Yes | Go to the next step.
No | Repair a short to the ground circuit, then go to Step 9.
6 | INSPECT A/F SENSOR HEATER CIRCUIT FOR SHORT CIRCUIT IN WIRING HARNESS • A/F sensor and PCM connectors are disconnected. • Measure the resistance between suspect A/F sensor wiring harness-side connector terminal E and the following terminals: ― A/F sensor wiring harness-side connector terminal D ― A/F sensor wiring harness-side connector terminal C ― A/F sensor wiring harness-side connector terminal F ― A/F sensor wiring harness-side connector terminal H ― A/F sensor wiring harness-side connector terminal G • Is the resistance greater than 10 kilohms? | Yes | Go to the next step.
No | Repair for a short circuit, then go to Step 9.
7 | INSPECT A/F SENSOR INTERNAL RESISTANCE OF A/F SENSOR HEATER • A/F sensor and PCM connectors are disconnected. • Measure the resistance between suspect A/F sensor connector terminal C and E on the component side. • Is the resistance between 1—10 ohms? | Yes | Go to the next step.
No | Replace the suspect A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZI-3.7].) Go to Step 9.
8 | INSPECT A/F SENSOR HEATER CIRCUIT FOR INTERNAL SHORT CIRCUIT TO GROUND • A/F sensor and PCM connectors are disconnected. • Measure the resistance between suspect A/F sensor component side connector terminal E and ground. • Is the resistance greater than 10 kilohms? | Yes | Go to the next step. (The system is operating normally at this time. The concern may have been caused by a loose or corroded connector.)
No | Replace the suspect A/F sensor. (See AIR FUEL RATIO (A/F) SENSOR REMOVAL/INSTALLATION [MZI-3.7].) Go to the next step.
9 | VERIFY TROUBLESHOOTING OF DTC P0053:00, P0059:00 HAS BEEN COMPLETED • Verify that all disconnected connectors are reconnected. • Clear the DTC from the PCM memory using the M-MDS. • Perform the KOEO or KOER self-test. (See KOEO/KOER SELF TEST [MZI-3.7].) • 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.
10 | 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.