DTC U3004-16: Acc Relay Circuit Malfunction [Start Stop Unit]: Notes
DTC U3004:16 (START STOP UNIT) DETECTION CONDITION AND POSSIBLE CAUSE
| Description |
ACC relay circuit malfunction |
| Detection condition |
- Start stop unit detects that the ACC monitor voltage of less than 2.5 V for 1 s or more with the ignition switched to ACC or ON (engine off or on).
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| Fail-safe |
Not applicable |
| Possible cause |
- ACC relay malfunction
- ACC relay circuit malfunction
- Short to ground in wiring harness between MAIN 200 A fuse and ACC relay terminal D
- IG2 30 A fuse malfunction
- MAIN 200 A fuse malfunction
- Open circuit in wiring harness between battery positive terminal and ACC relay terminal D
- Start stop unit connector or terminal malfunction
- Short to ground in wiring harness between ACC relay terminal C and start stop unit terminal 1E
- MIRROR 7.5 A fuse malfunction
- Open circuit in wiring harness between ACC relay terminal C and start stop unit terminal 1E
- Start stop unit malfunction
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 Courtesy of MAZDA MOTORS CORP.
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