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Mitsubishi P1A75

CMU12 module temperature abnormal (high input) . TROUBLE JUDGMENT Check Conditions  Three seconds elapse after the electric motor switch is turned ON, o r three seconds elapse aft

DriveNot yet established by verified evidence.
ChargeNot yet established by verified evidence.
ServiceService need is not explicitly established by the supplied record; however, because this code concerns the main drive lithium-ion battery temperature-monitoring system, seek evaluation from a qualified Mitsubishi EV service provider.
Confidence95%

Quick answer

P1A75 identifies an abnormal high-input temperature signal for CMU12 in the main drive lithium-ion battery monitoring system. Verified applicability is limited to U.S.-spec Mitsubishi i-MiEV model years 2012, 2014, and 2016.

This page separates verified manufacturer/regulator evidence from supporting material. Unsupported causes, repairs or safety conclusions are not guessed.

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1. What does P1A75 mean?

P1A75 identifies an abnormal high-input temperature signal for CMU12 in the main drive lithium-ion battery monitoring system. Verified applicability is limited to U.S.-spec Mitsubishi i-MiEV model years 2012, 2014, and 2016.

2. Technical explanation

Mitsubishi technical service bulletins identify P1A75 as “CMU12 module temperature abnormal (high input)” / “CMU12 Battery Temperature.” The judgment conditions include at least 3 seconds after the electric motor switch is turned ON or at least 3 seconds after main drive lithium-ion battery charging begins. The listed conditions also require that P1AA8 (Bat-CAN signal timeout / Local CAN for Main Drive Lithium-ion Battery) and U1082 (Bat-CAN bus-off) are not set.

3. What system is affected?

CMU12 temperature monitoring within the main drive lithium-ion battery system.

4. How serious is this code?

Not yet established by verified evidence.

5. Symptoms you may notice

  • Not yet established by verified evidence.

6. Possible causes

  • Not yet established by verified evidence.

7. Can I still drive the vehicle?

Not yet established by verified evidence.

8. Can I charge the vehicle?

Not yet established by verified evidence.

9. What you can safely do

  • Do not perform high-voltage battery repairs or disassembly.
  • Have the vehicle evaluated by a qualified Mitsubishi EV service provider.

10. Step-by-step troubleshooting

  1. Confirm the stored DTC with suitable diagnostic equipment.
  2. Check whether P1AA8 or U1082 is also stored, as the verified judgment conditions state that these codes must not be set for P1A75 judgment.
  3. Further diagnostic procedure is not established by the supplied verified evidence.

11. When to contact service

Service need is not explicitly established by the supplied record; however, because this code concerns the main drive lithium-ion battery temperature-monitoring system, seek evaluation from a qualified Mitsubishi EV service provider.

12. What the service center may check

  • Retrieve and document all stored diagnostic trouble codes.
  • Verify whether the conditions described in Mitsubishi bulletin evidence are present: at least 3 seconds after the electric motor switch is turned ON or after main drive lithium-ion battery charging begins.
  • Determine whether P1AA8 or U1082 is stored.

13. Possible repair or resolution

  • Not yet established by verified evidence.

14. Affected vehicles

15. Related TSBs / service bulletins

  • TSB-19-54-003, published March 13, 2019; NHTSA manufacturer communication MC-10158408. It lists P1A75 as CMU12 module temperature abnormal (high input).
  • TSB-19-54-004, published March 13, 2019; NHTSA manufacturer communication MC-10158409. It lists P1A75 as CMU12 module temperature abnormal (high input).
  • TSB-19-54-005, published March 13, 2019; NHTSA manufacturer communication MC-10158410. It lists P1A75 as CMU12 Battery Temperature.

16. Recall information

  • Not yet established by verified evidence.

17. Official manufacturer information

Official manufacturer communications are available through NHTSA: MC-10158408, MC-10158409, and MC-10158410, all published March 13, 2019.

19. Frequently asked questions

What does Mitsubishi P1A75 mean?

Verified Mitsubishi bulletin evidence identifies it as CMU12 module temperature abnormal (high input), also described as CMU12 Battery Temperature.

When can P1A75 be judged?

The supplied bulletin evidence states that 3 seconds must have elapsed after the electric motor switch is turned ON or after main drive lithium-ion battery charging begins. It also states that P1AA8 and U1082 must not be set.

Which vehicles are verified for this code?

Verified applicability is Mitsubishi i-MiEV, U.S. region, model years 2012, 2014, and 2016.

20. Sources & verification

Verified
Mitsubishi P1A75: CMU12 module temperature abnormal (high input) .… | EV Diagnostics