Suzuki Grand Vitara JB419. Manual — part 26

Engine General Information and Diagnosis: 1A-81

DTC P1480: Defective Particulate Filter Inlet Pick-Off Failures Malfunction

S5JB0B1104134

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:

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

Detecting Condition

Troubleshooting

DTC P1641: Additional Heater Relay No.1 Control Circuit

S5JB0B1104146

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present after the engine is started.

• 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 CO.0: Open circuit or short circuit to vehicle body ground

Displaying on SUZUKI scan tool

Detecting condition

1.DEF

Inconsistency of signal

Check the condition of the following pressure pipes:
• Differential pressure sensor upstream side pipe
Check that the pipe is not crushed, blocked or pierced.
Check the correct position and connection on the differential pressure sensor.
Replace the differential pressure sensor upstream side pipe if necessary.

Displaying on SUZUKI scan tool

Detecting condition

CO.0

Open circuit or short circuit to vehicle body ground

CO.1

Short circuit to +12 V

Check the condition of the additional heater relay No.1.
Check the ECM connections.
Repair if necessary.
Check the additional heater relay No.1 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.1 mounting connector and “C86-39” terminal of ECM

connector

• Between “C93-1” wire of additional heater relay No.1 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.

1A-82 Engine General Information and Diagnosis:

Troubleshooting for CC.1: Short circuit to +12 V

DTC P1642: Additional Heater Relay No.2 and 3 Control Circuit

S5JB0B1104147

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present after the engine is started.

• 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 CO.0: Open circuit or short circuit to vehicle body ground

Troubleshooting for CC.1: Short circuit to +12 V

Check the condition of the additional heater relay No.1.
Check the ECM connections.
Repair if necessary.
Check the turbocharger electric water pump relay mounting connections.
Check the continuity and insulation from +12 V of the following connection:
• Between “C93-5” wire of additional heater relay No.1 mounting connector and “C86-39” 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

CO.0

Open circuit or short circuit to vehicle body ground

CC.1

Short circuit to +12 V

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.

Engine General Information and Diagnosis: 1A-83

DTC P2002: Particulate Trap Efficiency Below Threshold Malfunction

S5JB0B1104135

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 in Section 1C”
or “Diesel Particulate Filter Removal and Installation 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

Troubleshooting

Displaying on SUZUKI scan tool

Detecting condition

1.DEF

ABSENT

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.

1A-84 Engine General Information and Diagnosis:

DTC P2031: Exhaust Gas Temperature Sensor Circuit Malfunction

S5JB0B1104136

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

Displaying on SUZUKI scan tool

Detecting condition

CC.0

Short circuit to vehicle body ground

CO.1

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.