09440-17003 Suzuki Spring, Return

Table 1
Diagnostic Codes Table
J1939 Code and Description Conditions which Generate this Code System Response
678-3 ECU 8 Volts DC Supply : Voltage Above Normal The digital sensor supply voltage is above normal for two seconds. The code is logged.
All sensors are set to default values.
678-4 ECU 8 Volts DC Supply : Voltage Below Normal The digital sensor supply voltage is below normal for two seconds.
3509-3 Sensor Supply Voltage 1 : Voltage Above Normal The analog sensor supply voltage is above normal for two seconds. The code is logged.
All sensors are set to default values.
3509-4 Sensor Supply Voltage 1 : Voltage Below Normal The analog sensor supply voltage is below normal for two seconds.
3510-3 Sensor Supply Voltage 2 : Voltage Above Normal The analog sensor supply voltage is above normal for two seconds. The code is logged.
All sensors are set to default values.
3510-4 Sensor Supply Voltage 2 : Voltage Below Normal The analog sensor supply voltage is below normal for two seconds. System Operation (Primary ECM)The primary and/or secondary Electronic Control Module (ECM) supplies a regulated voltage of 5.0 0.2 VDC to the following sensors:
Atmospheric pressure sensor (Primary ECM)
Crankcase pressure sensor (Primary ECM)
Turbocharger outlet pressure sensor (Primary & Secondary ECM)
Jacket water coolant pressure sensor (Primary & Secondary ECM)
Filtered engine oil pressure sensor (Primary & Secondary ECM)
Unfiltered engine oil pressure sensor (Primary & Secondary ECM)
Filtered fuel pressure sensor (Primary & Secondary ECM)
Unfiltered fuel pressure sensor (Primary)
Left turbocharger inlet pressure sensor (Primary ECM)
Right turbocharger inlet pressure sensor (Primary ECM)The ECM supplies a regulated voltage of 8.0 0.4 VDC to the following sensors:
Left turbocharger turbine inlet temperature sensor (Primary ECM)
Right turbocharger turbine inlet temperature sensor (Primary ECM)System Operation (Secondary ECM)This engine utilizes a redundant control system in the case of an ECM failure. If the primary ECM fails, the secondary ECM provides for engine control and engine system monitoring. The secondary ECM utilizes several additional active sensors to monitor engine operation.The supply voltage for the sensors is routed from the ECM to terminal 1 of each sensor connector. The sensor return for the sensors is routed from the ECM to terminal 2 of each sensor connector. The ECM provides short circuit protection for the internal power supply. A short circuit to the battery will not damage the internal power supply.If applicable, when a -10 code is logged, this code indicates that the 5 V supply is not available at the sensor connector. During normal engine operation, each of the signals from the pressure sensors fluctuate slightly. When the 5 V supply becomes unavailable at the pressure sensor connector, the signal from that sensor floats to a midrange value. The signal will not fluctuate. If the signal from the sensor remains abnormally steady for more than 30 seconds, the ECM will activate this code.Note: The sensors are not protected from overvoltage. A short from the supply line to the +Battery may damage the sensors. Repair the sensor supply and check for any active sensor diagnostic codes in order to determine if a sensor has failed.
Illustration 1 g03006457
Schematic for the analog sensors (pri.)
Illustration 2 g03036197
Schematic for the analog sensors (sec.)
Illustration 3 g03006997
Schematic of the PWM sensors for the sensor signal circuit (pri.)
Illustration 4 g02971979
Terminal locations at the P1 ECM connector for the analog sensors and the digital sensors
(P1-5) Digital return (pri.)
(P1-15) Left turbo inlet pressure (pri.)
(P1-18) Digital return (pri.)
(P1-27) Right turbo inlet pressure (pri.)
Illustration 5 g02971984
Terminal locations at the P2 ECM connector for the analog sensors
(P2-15) Intake manifold pressure (prim. & sec.)
(P2-16) Fuel transfer pressure (unfiltered) (prim.)
(P2-17) Analog return (prim.)
(P2-27) Fuel transfer pressure (filtered) (prim. & sec.)
(P2-28) Filtered oil pressure (prim. & sec.)
(P2-29) Digital supply (prim. & sec.)
(P2-30) Analog return (prim.)
(P2-33) Crankcase pressure (prim.)
(P2-54) Analog return (prim.)
(P2-57) Jacket water pressure (prim. & sec.)
(P2-65) Left turbocharger turbine inlet temperature (prim. & sec.)
(P2-66) Unfiltered oil pressure (prim. & sec.)
(P2-72) Analog sensor supply (prim.)
(P2-73) Left turbocharger turbine inlet temperature (prim. & sec.)
(P2-78) Barometric pressure (prim.)
(P2-80) Analog sensor supply (prim.)
(P2-81) Analog sensor supply (prim.)
(P2-82) Analog sensor supply (prim. & sec.)
(P2-83) Analog return (prim. & sec.)
(P2-92) Digital return (prim. & sec.)
(P2-93) Analog return (prim.)
Illustration 6 g01240891
Sensor connector
(Terminal 1) Sensor supply
(Terminal 2) Sensor return
(Terminal 3) Signal
Table 2
Troubleshooting Test Steps Values Results
1. Inspect the Electrical Connectors and the Wiring
A. Turn the main disconnect switch to the OFF position.
B. Thoroughly inspect connectors (1) through (7). Inspect all of the connectors that are associated with the circuit. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connectors that are associated with the circuit.
D. Check the allen head screw for each of the ECM co