SL/R230: P1925 code no crank issue
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Joined: Jun 2024
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SL55 amg R230
P1925 code no crank issue
Hi guys i have a no crank no start issue this is one of the faults i am getting..
P1925 Drive authorisation has been refused by control module N15/5 esm ewmm
Any advise please?
P1925 Drive authorisation has been refused by control module N15/5 esm ewmm
Any advise please?
Thread Starter
Member
Joined: Jun 2024
Posts: 121
Likes: 0
SL55 amg R230
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Joined: Aug 2020
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From: Gretna, NE
'03 SL55 Black, '03 SL500's Aegean, Mars Red, Tazanite, Alabaster, '11 S550 Flint Gray
The ESM doesn't agree with you, it says low voltage. I'm not saying your opinion doesn't matter, but I'm going with the ESM on this one. The ESM uses 30z power provided by relay M. Check for battery voltage at F44 with ignition on (It is terminal 30z, so the key doesn't have to be on, but the car must be awake. With key on, it will be awake.) The source for relay M is pin 87. With the relay removed, you should have rear battery voltage at the pin 87 socket. If you do, you can jumper the socket, pin 87 to pin 30 to bypass the relay. This power is provided from F33f1, the 60A fuse in F33 (rear prefuse). Work your way back and find the problem. This is also power for relay L, which is your start relay. Once you have power on this circuit, you should get drive authorization and cranking.
I don't recall your exact year. The passenger fuse box has a couple different configurations, but I think this info should apply to all SL55's.
I don't recall your exact year. The passenger fuse box has a couple different configurations, but I think this info should apply to all SL55's.
Thread Starter
Member
Joined: Jun 2024
Posts: 121
Likes: 0
SL55 amg R230
The ESM doesn't agree with you, it says low voltage. I'm not saying your opinion doesn't matter, but I'm going with the ESM on this one. The ESM uses 30z power provided by relay M. Check for battery voltage at F44 with ignition on (It is terminal 30z, so the key doesn't have to be on, but the car must be awake. With key on, it will be awake.) The source for relay M is pin 87. With the relay removed, you should have rear battery voltage at the pin 87 socket. If you do, you can jumper the socket, pin 87 to pin 30 to bypass the relay. This power is provided from F33f1, the 60A fuse in F33 (rear prefuse). Work your way back and find the problem. This is also power for relay L, which is your start relay. Once you have power on this circuit, you should get drive authorization and cranking.
I don't recall your exact year. The passenger fuse box has a couple different configurations, but I think this info should apply to all SL55's.
I don't recall your exact year. The passenger fuse box has a couple different configurations, but I think this info should apply to all SL55's.
Last edited by MR.AMG.; Jul 3, 2024 at 05:45 PM.
