DTC P1001 [MZI-3.7]

id0102d2822000

DTC P1001

KOER not able to complete, KOER aborted

DETECTION CONDITION

•  P1001 indicates any of the following

•  Unable to access Continuous Memory DTCs.

•  Unable to activate KOEO or KOER Self-Test.

•  The M-MDS tester communication problem.

•  DTC displayed by the M-MDS tester not listed.

•  KOER Self-Test cannot be completed.

POSSIBLE CAUSE

•  PCM connector or terminal malfunction

•  Damaged DLC-2.

•  Incorrect Self-Test procedure.

•  VREF is not in specification.

•  Idle RPM out of specification.

•  Open in DLC-2 wiring harness circuit.

•  Short in DLC-2 circuit or associated modules.

•  Damaged PCM power relay circuit

DTC P1001	KOER not able to complete, KOER aborted
DETECTION CONDITION	• P1001 indicates any of the following • Unable to access Continuous Memory DTCs. • Unable to activate KOEO or KOER Self-Test. • The M-MDS tester communication problem. • DTC displayed by the M-MDS tester not listed. • KOER Self-Test cannot be completed.
POSSIBLE CAUSE	• PCM connector or terminal malfunction • Damaged DLC-2. • Incorrect Self-Test procedure. • VREF is not in specification. • Idle RPM out of specification. • Open in DLC-2 wiring harness circuit. • Short in DLC-2 circuit or associated modules. • Damaged PCM power relay circuit

Diagnostic procedure

STEP	INSPECTION		ACTION
1	VERIFY FREEZE FRAME DATA HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded?	Yes	Go to the next step.
1		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.
2		No	Go to the next step.
3	VERIFY RELATED PENDING CODE OR STORED DTCs • Turn the ignition switch off then to the ON position (Engine off). • Verify related pending code or stored DTCs. • Are other DTCs present?	Yes	Go to the appropriate DTC troubleshooting. (See DTC TABLE [MZI-3.7].)
3		No	Go to the next step.
4	INSPECT FOR CORRECT PCM OPERATION • Disconnect all the PCM connectors. • Visually inspect for: ― Pushed out pins ― Corrosion • Connect all the PCM connectors and verify that they seat correctly. • Retrieve DTCs using the M-MDS. • Is the PENDING CODE for this DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZI-3.7].)
4		No	Go to the next step.
5	VERIFY TROUBLESHOOTING OF DTC P1001 HAS BEEN COMPLETED • Verify that all disconnected connectors are 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	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [MZI-3.7].)
5		No	Go to the next step.
6	VERIFY AFTER REPAIR PROCEDURE • Perform the “After Repair Procedure”. (See AFTER REPAIR PROCEDURE [MZI-3.7].) • Are any DTC present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7].)
6		No	Troubleshooting completed.