DTC P1464 [MZI-3.7 (PCM CONNECTOR (2 TYPES))]

id0102e3874200

DTC P1464

A/C demand out of self-test range

DETECTION CONDITION

•  The DTC sets when the PCM receives a request for A/C during the self-test.

POSSIBLE CAUSE

•  A/C or defrost on during self-test

•  A/C relay circuit short to voltage

•  A/C switch malfunction

•  A/C relay malfunction

•  PCM malfunction

DTC P1464	A/C demand out of self-test range
DETECTION CONDITION	• The DTC sets when the PCM receives a request for A/C during the self-test.
POSSIBLE CAUSE	• A/C or defrost on during self-test • A/C relay circuit short to voltage • A/C switch malfunction • A/C relay malfunction • PCM malfunction

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 A/C AND DEFROST ARE OFF DURING SELF-TEST • Perform the “KOEO/KOER self-test”. (See KOEO/KOER SELF TEST [MZI-3.7 (PCM CONNECTOR (2 TYPES))].) • Are the A/C and defrost off during the self-test?	Yes	Go to the next step.
3		No	Turn the A/C and defrost off. Then go to Step 5.
4	INSPECT ACCS PID • Turn the ignition switch to the ON position (Engine off). • A/C and defroster OFF. • Access the PCM and monitor the ACCS PID. • Is the PID state ON?	Yes	The ACCS PID indicates that the PCM is being requested to turn on the A/C. Inspect the A/C system. (See DIAGNOSTIC TROUBLE CODE NUMBER INSPECTION.) Then go to the next step.
4		No	The ACCS PID indicates that the ACCS input to the PCM is low. Go to the next step.
5	VERIFY TROUBLESHOOTING OF DTC P1464 HAS BEEN COMPLETED • Verify that all disconnected connectors reconnected. • Clear the DTC from the PCM memory using the M-MDS. • Perform the KOEO or KOER self-test using the M-MDS. (See KOEO/KOER SELF TEST [MZI-3.7 (PCM CONNECTOR (2 TYPES))].) • Is the PENDING CODE for the 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 “AFTER REPAIR PROCEDURE”. (See AFTER REPAIR PROCEDURE [MZI-3.7 (PCM CONNECTOR (2 TYPES))].) • Are any DTCs present?	Yes	Go to the applicable DTC inspection. (See DTC TABLE [MZI-3.7 (PCM CONNECTOR (2 TYPES))].)
6		No	Troubleshooting completed.