DTC P1464:00 [MZI-3.7 (PCM CONNECTOR (3 TYPES))]

id0102e4317600

DTC P1464:00

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
•  Communication error between PCM and climate control module
•  Short to power supply between PCM terminal 1W and A/C relay
•  A/C switch signal malfunction
•  A/C relay malfunction
•  PCM malfunction
Note
•  If the A/C or defrost was on during self-test, turn the A/C or defrost off and repeat the self-test. An A/C request to the PCM may come through the communication link or on a dedicated hardwire circuit from the A/C switch.

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.
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
VERIFY A/C AND DEFROST ARE OFF DURING SELF-TEST
•  Perform the KOEO or KOER self-test.
•  Are the A/C and defrost off during the self-test?
Yes
Go to the next step.
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.
No
The ACCS PID indicates that the ACCS input to the PCM is low.
Inspect the following:
•  Short to power supply circuit between PCM terminal 1W and A/C relay
•  A/C relay
Repair or replace if necessary.
Go to the next step.
5
VERIFY TROUBLESHOOTING OF DTC P1464:00 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.
•  Is the PENDING CODE for the DTC present?
Yes
Repeat the inspection from Step 1.
•  If the malfunction recurs, replace the PCM.
Go to the next step.
No
Go to the next step.
6
VERIFY AFTER REPAIR PROCEDURE
•  Perform the “AFTER REPAIR PROCEDURE”.
•  Are any DTCs present?
Yes
Go to the applicable DTC inspection.
(See DTC TABLE [MZI-3.7 (PCM CONNECTOR (3 TYPES))].)
No
Troubleshooting completed.