Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 100

1A-347 Engine General Information and Diagnosis: For Diesel Engine Model

Troubleshooting for CO0: Open circuit or short circuit to vehicle body ground

Troubleshooting for CC1: Short circuit to +12 V

DTC P2002: Diesel Particulate Filter Efficiency Below Threshold

S6JB0A1124135

CAUTION

!

The parameters must be reinitialised after any procedure is carried out on the diesel particulate filter.
Use command “Initialize Diesel PF data” on SUZUKI scan tool, and diesel particulate filter after-sales
regeneration referring to “Diesel Particulate Filter After-sales Regeneration Procedure: For Diesel
Engine Model in Section 1C” or “Diesel Particulate Filter Removal and Installation: For Diesel Engine
Model in Section 1K”.

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present after the engine is started or following a road test.

• If the fault is present:

– Diesel particulate filter regenerations are inhibited.
– Blue and white fumes and black particles can be seen at the exhaust.

Detecting Condition

Check the condition of the additional heater relay No.2 and No.3.
Check the ECM connections.
Repair if necessary.
Check the additional heater relay No.2 and No.3. mounting connections.
If these checks are correct,
Check the continuity and insulation from vehicle body ground of the following connections:
• Between “C93-5” wire of additional heater relay No.2 mounting connector and “C85-19” terminal of ECM

connector

• Between “C94-3” wire of additional heater relay No.2 mounting connector and “E33-6” wire of main relay

connector

• Between “C95-5” wire of additional heater relay No.3 mounting connector and “C85-19” terminal of ECM

connector

• Between “C95-3” wire of additional heater relay No.3 mounting connector and “E33-6” wire of main relay

connector

Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.

Check the condition of the additional heater relay No.2 and No.3.
Check the ECM connections.
Repair if necessary.
Check the additional heater relay No.2 and No.3 mounting connections.
Check the continuity and insulation from +12 V of the following connection:
• Between “C93-5” wire of additional heater relay No.2 mounting connector and “C85-19” terminal of ECM

connector

• Between “C95-5” wire of additional heater relay No.3 mounting connector and “C85-19” terminal of ECM

connector

Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.

Displaying on SUZUKI scan tool

Detecting condition

D1

ABSENT

Engine General Information and Diagnosis: For Diesel Engine Model 1A-348

Troubleshooting

DTC P2031: Exhaust Gas Temperature 2 Sensor Circuit

S6JB0A1124136

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present after the engine is started or following a road test.

• If the fault is present:

– Diesel particulate filter regenerations are inhibited.
– The Injection warning light (gravity 1 warning light) is lit.

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

Check the diesel particulate filter is present.
If it is already present,
Visually inspect the diesel particulate filter by placing the vehicle on a lift:
• Not damaged (no abnormal welds, if necessary compare it with another fitted vehicle),
• If After Sales sleeves are present, following a previous procedure, check that the diesel particulate filter has

not had its contents removed when it was removed.

If the diesel particulate filter is not in good working order or is absent, replace diesel particulate filter.

Displaying on SUZUKI scan tool

Detecting condition

CC0

Short circuit to vehicle body ground

CO1

Open circuit or short circuit to +12 V

Check for the continuity, absence of interference resistance and insulation from +12 V for the following
connections:
• Between “C87-1” wire of exhaust gas temperature sensor 2 connector and “C86-31” terminal of ECM

connector

• Between “C87-2” wire of exhaust gas temperature sensor 2 connector and “C86-18” terminal of ECM

connector

Repair if necessary.
Check the continuity, absence of interference resistance and insulation from vehicle body ground of the following
connection:
• Between “C87-1” wire of exhaust gas temperature sensor 2 connector and “C86-31” terminal of ECM

connector

Repair if necessary.
Check for the presence of ground on “C87-1” wire of the exhaust gas temperature sensor 2 connector.
Check the exhaust gas temperature sensor 2 resistance between “C87-1” and “C87-2” terminals of the
connector according to parameter “Diesel PF in Temp” on Data List of SUZUKI scan tool.

Diesel particulate filter upstream temperature:
106000

Ω at 50 °C, 122 °F

33500

Ω at 100 °C, 212 °F

13900

Ω at 150 °C, 302 °F

6896

Ω at 150 °C, 392 °F

2575

Ω at 300 °C, 572 °F

1202

Ω at 400 °C, 752 °F

673

Ω at 500 °C, 932 °F

424

Ω at 600 °C, 1112 °F

If the recorded values do not correspond to the above values, replace the exhaust gas temperature sensor 2 of
the diesel particulate filter.
If the fault is still present, substitute a known-good ECM and recheck.

1A-349 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P2120: APP Sensor (Sub) Circuit

S6JB0A1124137

CAUTION

!

• This fault may appear if the wiring harness has been damaged.

Follow the procedure described in “Electrical Circuit Inspection Procedure in Section 00”.

• This check enables the condition and the conformity of the engine wiring harness to be checked.

NOTE

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

The fault is declared present after a series of full load/no load actions on the accelerator pedal.

• Turbocharging, passenger compartment heating resistor activation and cruise control/ speed limiter

are not authorised.

• If the fault is present, the Injection warning light (gravity 1 warning light) is lit.
• The engine speed is fixed at 1400 rpm if there is a fault on “main” and “sub” wire of the accelerator

pedal position (APP) sensor and the engine torque is limited.

• Use service wire for all operations on the controller connectors.
• Priorities when dealing with a number of faults:

Apply the procedure for dealing with fault “DTC P0651: Sensor Reference Voltage 2 Circuit: For
Diesel Engine Model” first if it is present or stored.

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 CO0: Open circuit or short circuit to vehicle body ground

NOTE
Priorities when dealing with a number of faults:
If fault “DTC P0225: APP Sensor (Main) Circuit: For Diesel Engine Model” is present at the same time,
check that the sensor is connected correctly.

Displaying on SUZUKI scan tool

Detecting condition

CO0

Open circuit or short circuit to vehicle body ground

CC1

Short circuit to +12 V

D1

Inconsistency of signal

Check the connections of the accelerator pedal position (APP) sensor.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation from vehicle body ground of the following connections:
• Between “E68-6” wire of accelerator pedal position (APP) sensor connector and “E66-21” terminal of ECM

connector

• Between “E68-1” wire of accelerator pedal position (APP) sensor connector and “E66-15” terminal of ECM

connector

Repair if necessary.
Measure the resistance on the accelerator pedal position (APP) sensor (sub) on accelerator pedal position
(APP) sensor assembly between “E68-1” and “E68-5” terminals.
Replace the accelerator pedal position (APP) sensor assembly if the resistance is not 0.8 – 4.9 k

Ω.

Engine General Information and Diagnosis: For Diesel Engine Model 1A-350

Troubleshooting for CC1: Short circuit to +12 V

NOTE
Priorities when dealing with a number of faults:
If fault “DTC P0225: APP Sensor (Main) Circuit: For Diesel Engine Model” is present at the same time,
check that the sensor is connected correctly.

Troubleshooting for D1: Inconsistency of signal

Check the connections of the accelerator pedal position (APP) sensor.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation in relation to +12 V of the following connections:
• Between “E68-6” wire of accelerator pedal position (APP) sensor connector and “E66-21” terminal of ECM

connector

• Between “E68-1” wire of accelerator pedal position (APP) sensor connector and “E66-15” terminal of ECM

connector

• Between “E68-5” wire of accelerator pedal position (APP) sensor connector and “E66-27” terminal of ECM

connector

Repair if necessary.
Measure the resistance on the accelerator pedal position (APP) sensor (sub) on accelerator pedal position
(APP) sensor assembly between “E68-1” and “E68-5” terminals.
Replace the accelerator pedal position (APP) sensor assembly if its resistance is not approximately: 0.8 – 4.9
k

Ω.

Check the fuel pressure sensor connectors.
Check the ECM connections.
Repair if necessary.
Check the following connections for continuity and make sure there is no interference resistance:
• Between “E68-6” wire of accelerator pedal position (APP) sensor connector and “E66-21” terminal of ECM

connector

• Between “E68-1” wire of accelerator pedal position (APP) sensor connector and “E66-15” terminal of ECM

connector

• Between “E68-5” wire of accelerator pedal position (APP) sensor connector and “E66-27” terminal of ECM

connector

• Between “E68-3” wire of accelerator pedal position (APP) sensor connector and “E66-3” terminal of ECM

connector

• Between “E68-2” wire of accelerator pedal position (APP) sensor connector and “E66-4” terminal of ECM

connector

• Between “E68-4” wire of accelerator pedal position (APP) sensor connector and “E66-5” terminal of ECM

connector

Repair if necessary.
If the fault is still present, replace the accelerator pedal position (APP) sensor assembly.