AEM 30-6821 Series 2 Plug & Play EMS User Manual
Page 10
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2. Operational Fault
– When the system detects a fault during normal operation (e.g. driving,
idling, etc), the indicator lights will repeatedly flash in an alternating pattern to alert the user of
this fault until the ignition key is turned off. Note that the ETC system will not be functional and
the EMS may disable engine operation during this mode depending on the severity of the fault.
Once the ignition has been turned off and then on again the indicator lights will flash the fault
code for the affected system. The affected ETC system code will be first flashed on the
CRUISE light after which the failure type will be flashed on the SET light. These codes are
listed in Table 2 and Table 3. The ETC system will remain un-activated until the following boot-
up cycle, i.e. key-off then key-on.
Troubleshooting Calibration Faults
A calibration fault will be reported if the Accelerator Pedal Position (APP) or Throttle Position Sensor
(TPS) sensors are found to be outside of the specification limits. Table 4 details the electrical limits for
these sensors.
Sensor
Mechanical Position
Voltage Limit (VDC)
APP1 ( Main )
Minimum ( Idle )
1.00 ± 0.35
Maximum ( WOT )
4.00 ± 0.45
APP2 ( Sub )
Minimum ( Idle )
1.00 ± 0.35
Maximum ( WOT )
4.00 ± 0.45
TPS1 ( Main )
Minimum ( Idle )
0.70 ± 0.30
Maximum ( WOT )
4.10 ± 0.45
TPS2 ( Sub )
Minimum ( Idle )
1.45 ± 0.30
Maximum ( WOT )
4.10 ± 0.45
Table 4
– Sensor Electrical Calibration Limits
A fault code of “5 - RP / Relay” may be caused by a fouled throttle bore, a malfunctioning or missing
ETC relay, or if the throttle body has mechanically failed.
Calibration Faults
1
APP Minimum
2
APP Maximum
3
TPS Minimum
4
TPS Maximum
5
RP / Relay
Table 1
– System Fault Code
Operational Fault
– Failure Type
1
Out of Range
2
Noise
3
Disagreement
4
General
5
F2
6
N/A
7
N/A
8
N/A
9
N/A
Table 3
– Failure Type Fault Code
Operational Fault - System
1
APP
2
TPSA
3
TPSB
4
Target
5
System Voltage
6
Motor Driver
7
WDR
8
EEPROM
9
N/A
Table 2
– System Fault Code