SsangYong Rexton. Service manual — part 111
DI10-49
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
DIAGNOSIS
DI ENG SM - 2004.4
DTC
Trouble
Limp
Home
Mode
Immediately
Engine
Stop
Delayed
Engine
Stop
Torque
Reduction
(max.20%)
Help
Torque
Reduction
(max.50%)
P1254
P1253
Maximum Rail Pressure
Control Malfunction (IMV
Fault)
Minimum Rail Pressure
Control Malfunction (IMV
Fault)
- Rail pressure faults: Too high
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open and
short.
- Check the high pressure fuel lines, fuel
rails and high pressure pipes for leaks.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar: 4.055 ±
0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel pres-
sure lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
- Rail pressure faults: Too low
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open and
short.
- Check the high pressure fuel lines, fuel
rails and high pressure pipes for leaks.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar: 4.055 ±
0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel pres-
sure lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
DI10-50
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
DIAGNOSIS
DI ENG SM - 2004.4
DTC
Trouble
Limp
Home
Mode
Immediately
Engine
Stop
Delayed
Engine
Stop
Torque
Reduction
(max.20%)
Help
Torque
Reduction
(max.50%)
P1256
P1257
Too Small Transfer Pres-
sure Fuel in Rail Pressure
System
Too Large Transfer Pres-
sure Fuel in Rail Pressure
System
- Rail pressure fault: IMV current trim too
high, drift.
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open and
short.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar: 4.055 ±
0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel pres-
sure lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the high pressure fuel system.
• Check the fuel rails and high pres-
sure pipes for leaks.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
- Rail pressure fault: IMV current trim too
high, drift.
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open and
short.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar: 4.055 ±
0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel pres-
sure lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the high pressure fuel system.
• Check the fuel rails and high pres-
sure pipes for leaks.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
DI10-51
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
DIAGNOSIS
DI ENG SM - 2004.4
DTC
Trouble
Limp
Home
Mode
Immediately
Engine
Stop
Delayed
Engine
Stop
Torque
Reduction
(max.20%)
Help
Torque
Reduction
(max.50%)
P1258
P1259
Too Small High Pressure
Fuel in Rail Pressure Sys-
tem
Too Large High Pressure
Fuel in Rail Pressure Sys-
tem
- Rail pressure fault: IMV current trim too
high, drift.
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open and
short.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar: 4.055 ±
0.125V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the high pressure fuel system.
• Check the fuel rails and high pres-
sure pipes for leaks.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
- Rail pressure fault: IMV current trim too
high, drift.
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open and
short.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar: 4.055 ±
0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the high pressure fuel system.
• Check the fuel rails and high pres-
sure pipes for leaks.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
DI10-52
CHANGED BY
EFFECTIVE DATE
AFFECTED VIN
DIAGNOSIS
DI ENG SM - 2004.4
DTC
Trouble
Limp
Home
Mode
Immediately
Engine
Stop
Delayed
Engine
Stop
Torque
Reduction
(max.20%)
Help
Torque
Reduction
(max.50%)
P1191
P0255
P0251
P0253
Pressure Build Up - Too
Slow
IMV Driver Circuit Malfunc-
tion - Open
IMV Driver Circuit Malfunc-
tion - Short
IMV Driver Circuit Malfunc-
tion - Short to Ground
O
O
O
O
O
O
- The pressure build up during cranking
is too slow.
- Check the IMV wiring harness.
- Check the ECU wiring harness.
• Check the ECU pin #87 for open and
short.
- Check the rail pressure sensor.
• Supply voltage: 5 ± 0.1 V
• Output voltage at 1600 bar: 4.055 ±
0.125 V
• Output voltage at atmospheric
pressure: 0.5 ± 0.04 V
- Check the transfer pressure fuel lines.
• Check the fuel level in fuel tank.
Check the fuel system for air influx.
• Check the fuel filter specification.
- Check the high pressure fuel system.
• Check the fuel rails and high pres-
sure pipes for leaks.
- Check the IMV resistance: 5.44
Ω
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
- IMV driver circuit malfunction: Open
- Check the IMV wiring harness.
• Check the ECU pin #87 for open.
- Check the ECU wiring harness.
- Check the IMV resistance.
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
- IMV driver circuit malfunction: Short
- Check the IMV wiring harness.
• Check the ECU pin #87 for short.
- Check the ECU wiring harness.
- Check the IMV resistance.
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
- IMV driver circuit malfunction: Short to
ground
- Check the IMV wiring harness.
• Check the ECU pin #87 for short to
ground.
- Check the ECU wiring harness.
- Check the IMV resistance.
• When out of specified value: replace
high pressure pump and IMV
- Replace the ECU if required.
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