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Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 86

1A-291 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P0033: Boost Pressure Control Solenoid Valve Control Circuit

S6JB0A1124090

CAUTION

This fault can result in a rapid and significant fouling of the diesel particulate filter.

NOTE

• Conditions for applying the fault finding procedure to stored faults:

The fault is declared present after:
– Engine start.
– A road test.
– Output test “Boost pressure valve” on SUZUKI scan tool.

• If the fault is present:

– Turbocharging is no longer authorized.
– The EGR function is inhibited.
– The vehicle performance is reduced.
– The Injection warning light (gravity 1 warning light) is lit.
– If CC0 is present, the Malfunction indicator light (MIL) will come on after three consecutive driving

cycles (starting +5 seconds + turn OFF ignition switch and wait 40 seconds.).

• Use service wire for all operations on the ECM connectors.

Wiring Diagram
For wiring circuit and connector number, refer to “A-5 Engine and A/C Control System Circuit Diagram (DSL) in
Section 9A”.

Detecting Condition

Troubleshooting for CC1: Short circuit to +12 V

Troubleshooting for CC0: Short circuit to vehicle body ground and CO: Open circuit

Displaying on SUZUKI scan tool

Detecting condition

CC1

Short circuit to +12 V

CC0

Short circuit to vehicle body ground

Open circuit

Internal electronic fault

Check the boost pressure control solenoid valve connections.
Check the ECM connections.
Repair if necessary.
Measure the resistance of the boost pressure control solenoid valve between its “C90-1” and “C90-2” terminals:
If the resistance displayed is not 14.7 – 16.1

Ω at 20 °C, 68 °F, replace the boost pressure control solenoid valve.

Check the continuity and insulation from the +12 V feed of the following connection:
• Between “C90-1” wire of boost pressure control solenoid valve connector and “C85-23” terminal of ECM

connector

Repair if necessary.
If the fault is still present, replace the boost pressure control solenoid valve.

Ω at 20 °C, 68 °F, replace the boost pressure control solenoid valve.

Check the continuity and insulation from vehicle body ground of the following connections:
• Between “C90-1” wire of boost pressure control solenoid valve connector and “C85-23” terminal of ECM

connector

• Between “C90-2” wire of boost pressure control solenoid valve connector and “E33-6” wire of main relay

mounting connector

Repair if necessary.
If the fault is still present, replace the boost pressure control solenoid valve.

Engine General Information and Diagnosis: For Diesel Engine Model 1A-292

Troubleshooting for D1: Internal electronic fault

DTC P0089: Fuel Flow Actuator Performance

S6JB0A1124091

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present after:
– Engine start.
– A road test.
– Output test “IMV/Flow actuator” on SUZUKI scan tool.

• If the fault is present:

– It is not possible to start the engine.
– Engine stops if already started,
– If D3 is present, the Injection warning light (gravity 1 warning light) is lit.
– If one of the other faults is present, the Red stop warning light (gravity 2 warning light) is lit.

• Use service wire for all operations on the ECM connectors.

Wiring Diagram
For wiring circuit and connector number, refer to “A-5 Engine and A/C Control System Circuit Diagram (DSL) in
Section 9A”.

Ω at 20 °C, 68 °F, replace the boost pressure control solenoid valve.

connector

• Between “C90-2” wire of boost pressure control solenoid valve connector and “E33-6” wire of main relay

mounting connector

If the fault is still present, check that the ECM output stage is working correctly.With the boost pressure control
solenoid valve connected:
• Or using a voltmeter:

– Connect the negative terminal of the voltmeter to “C90-1” wire of the solenoid valve connector and the

positive terminal to “C90-2” wire.

– Clear any solenoid valve faults and perform output test “Boost pressure valve” on SUZUKI scan tool.

The voltmeter should display five cycles of two successive voltages: ~ 2.5 V (opening cyclic ratio of 20%)
then ~ 8.75 V (opening cyclic ratio of 70%).

• Or using an oscilloscope (at 5 V range/division and 1 ms/div time base):

– Connect the negative terminal of the oscilloscope to “C90-1” wire of the solenoid valve connector and the

positive terminal to “C90-2” wire of the solenoid valve connector.

– Clear any solenoid valve faults and perform output test “Boost pressure valve” on SUZUKI scan tool.

The oscilloscope should display a square wave signal with an amplitude of 12.5 V (equal to the battery
voltage) at a frequency of 140 Hz (with an opening cyclic ratio increasing successively from ~ 20 to ~ 70%).

– If the measurement is correct, replace the solenoid valve.
– If the measurement does not show any control or continuous voltage, substitute a known-good ECM and

recheck.

1A-293 Engine General Information and Diagnosis: For Diesel Engine Model

Detecting Condition

Troubleshooting for CC1: Short circuit to +12 V

Troubleshooting for CC0: Short circuit to vehicle body ground and CO: Open circuit

Displaying on SUZUKI scan tool

Detecting condition

CC1

Short circuit to +12 V

CC0

Short circuit to vehicle body ground

Open circuit

Internal electronic fault

Measured pressure too low

Measured pressure too high

Insufficient pressure

Pressure < minimum

Pressure > maximum

Repair if necessary.

Measure the resistance of the fuel flow actuator between “C83-1” and “C83-2” terminals.
If the resistance is not 2.9 – 3.1

Ω at 20 °C, 68 °F, replace the fuel flow actuator.

Check the continuity and insulation from the +12 V feed of the following connection:
• Between “C83-2” wire of the fuel flow actuator connector and “C86-7” terminal of ECM connector
Check the fuel pressure sensor using the interpretation of “DTC P0190: Fuel Pressure Sensor Circuit: For Diesel
Engine Model”.
If the fault is still present replace the fuel flow actuator.

Repair if necessary.

Measure the resistance of the fuel flow actuator between “C83-1” and “C83-2” terminals.
If the resistance is not 2.9 – 3.1

Ω at 20 °C, 68 °F, replace the fuel flow actuator.

Check the continuity, and insulation from vehicle body ground of the following connection:
• Between “C83-2” wire of fuel flow actuator connector and “C86-7” terminal of ECM connector
With ignition switch ON, check for +12 V on “C83-1” of the fuel flow actuator.If there is not +12 V on “C83-1”,
check the continuity and absence of interference resistance of the following connection:
• Between “C83-1” wire of fuel flow actuator connector and “E33-6” wire of main relay mounting connector
Repair if necessary.
Check the fuel pressure sensor using the interpretation of “DTC P0190: Fuel Pressure Sensor Circuit: For Diesel
Engine Model”.
If the fault is still present replace the fuel flow actuator.

Engine General Information and Diagnosis: For Diesel Engine Model 1A-294

Troubleshooting for D1: Internal electronic fault

Check the fuel flow actuator connector.
Check the ECM connections.
Check the low pressure circuit and that the correct fuel is being used using fault finding
• Tests Test 2 referring to “Test 2: Low pressure circuit check: For Diesel Engine Model”.
Repair if necessary.
Measure the resistance of the fuel flow actuator between “C83-1” and “C83-2” terminals.
If the resistance is not 2.9 – 3.1

Ω at 20 °C, 68 °F, replace the fuel flow actuator.

Check the continuity and for the absence of interference resistance on the following connections:
• Between “C83-2” wire of fuel flow actuator connector and “C86-7” terminal of ECM connector
• Between “C83-1” wire of fuel flow actuator connector and “E33-6” wire of main relay mounting connector
Repair if necessary.
Check the fuel pressure sensor using the interpretation of “DTC P0190: Fuel Pressure Sensor Circuit: For Diesel
Engine Model”.
Repair if necessary.
If the fault is still present, check that the ECM output stage is working correctly.
• Either using an ammeter:

With the regulator connected, connect the amperometric clamp to the connection to the fuel flow actuator
“C83-1” terminal connection, observing the current direction.Clear any fuel pressure sensor faults and perform
output test “IMV/Flow actuator” on SUZUKI scan tool.
The ammeter should display five cycles of two successive strengths: ~ 0.6 A then ~ 2 A

• Or using a voltmeter:

With the fuel flow actuator connected, connect the negative terminal of the voltmeter to “C83-2” wire of the
fuel flow actuator connector and the positive terminal to “C83-1” wire. Clear any fuel flow actuator faults, then
perform “IMV/Flow actuator” on SUZUKI scan tool:
The voltmeter should display two successive voltage readings:
~ 3.15 volts for an opening cyclic ratio of 25% then ~ 9.45 V for an opening cyclic ratio of 75% (five cycles)

• Or using an oscilloscope (at 5 V range/division and 1 ms/div time base):

With the fuel flow actuator connected, connect the negative terminal of the oscilloscope to the ground terminal
at battery and the positive terminal to “C83-2” wire of the fuel flow actuator connector, clear any fuel flow
actuator faults, then perform “IMV/Flow actuator” on SUZUKI scan tool:
The oscilloscope should display a square-wave signal of an amplitude of 12.5 V at a frequency of 185 Hz
(with an opening cyclic ratio alternating from 25 to 75%).

If the measurement does not show any control or continuous voltage, substitute a known-good ECM and
recheck.

Content .. 84 85 86 87 ..