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© 2021 AEM Performance Electronics
30-6053
Connector B
Pin
AEM adapter harness
pinout
(gray connectors wired to
vehicle wiring harness)
AEM EMS 30-6053
EMS I/O
EMS pin description
B1
Ignition signal
+12V switched
Input
Dedicated, +12V power for AEM EMS
B2
Power ground 1
Power ground
Input
Dedicated, power ground for AEM EMS
B3
Injector 2
Injector 2
Output
PnP for injector number 2
B4
Injector 3
Injector 3
Output
PnP for injector number 3
B5
Injector 4
Injector 4
Output
PnP for injector number 4
B6
--
PW 1i
Output
Available, pulse width modulated switched ground, 1.5A max
(inverted signal to PW 1)
B7
--
High side 2
Output
Available, sw12V power, 1.5A max
B8
--
Idle 5
Output
Available, switched ground, 1.5A max
B9
--
+12V switched
Output
Available, sw12V power (powered on when B1 is on)
B10
Power ground 2
Power ground
Input
Dedicated, power ground for AEM EMS
B11
Injector 1
Injector 1
Output
PnP for injector number 1
B12
VTEC solenoid valve
High side 1
Output
PnP for VTEC engagement signal
B13
--
Coil 1
Output
Available, 0–5V falling edge signal number 1 (connected to C4)
B14
--
--
--
Not used
B15
--
PW 1
Output
Available, pulse width modulated switched ground, 1.5A max
B16
--
Injector 8
Output
Available, pulse width modulated switched ground, 1.5A max
B17
--
Idle 6
Output
Available, sw12V power, 1.5A max
B18
--
Idle 7
Output
Available, switched ground, 1.5A max
B19
--
Injector 6
Output
Available, pulse width modulated switched ground, 1.5A max
B20
--
Power ground
Output
Available, power ground
B21
--
+12V switched
Input
Available, sw12V power
B22
--
Power ground
Output
Available, power ground
B23
--
PW 1
Output
Available, pulse width modulated switched ground, 1.5A max
B24
--
Knock 2
Input
Available, 0–5V knock sensor signal (connected to C22)
B25
--
Idle 8
Output
Available, sw12V power, 1.5A max