Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 99

1A-343 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P0830: CPP Switch Circuit

S6JB0A1124131

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 the clutch pedal is depressed, or during a road test.

• If this fault is present, the cruise control / speed limiter function will be inhibited.
• 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

Displaying on SUZUKI scan tool

Detecting condition

D1

Signal absent

D2

Inconsistency of signal

Check the condition and adjustment of the clutch pedal position (CPP) switch.
Repair if necessary.
If these checks are correct:
• Check the connections of the clutch pedal switch.
• Check the ECM connections.
Repair if necessary.
Check continuity and make sure there is no interference resistance on the following connection:
• Between “E71-2” wire of clutch pedal switch connector and “E66-30” terminal of ECM connector.
Repair if necessary.
Check for the presence of ground on “E71-1” wire of the clutch pedal switch.
Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.

Engine General Information and Diagnosis: For Diesel Engine Model 1A-344

DTC P1431: Clogged Diesel Particulate Filter Failures

S6JB0A1124132

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.
– The EGR function is inhibited.
– The vehicle performances are reduced.
– The Injection warning light (gravity 1 warning light) is lit.

 

Troubleshooting

DTC P1436: Diesel Particulate Filter Regeneration Request Failures

S6JB0A1124133

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”.

• In order to enable the diesel particulate filter to self-clean automatically, we recommend that you 

drive as soon as possible for up to about 20 minutes after diesel particulate filter warning light 
turning ON, at an average speed of 75 km/h (46 mph) compatible with:
– The road conditions.
– Respect for authorised speed limits.

 

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 warning light is lit.
– Specific driving requirement to regenerate the diesel particulate filter when driving.

• Order of priority in the event of more than one fault:

– Firstly, deal with fault “DTC P1431: Clogged Diesel Particulate Filter Failures: For Diesel Engine 

Model” if it is present or stored.

 

Check the condition of the following pressure pipes:
• Differential pressure sensor downstream side pipe if necessary.
The fault appears if the weight of soot contained in the filter is greater than 50 g.
Carry out diesel particulate filter after-sales regeneration referring to “Diesel Particulate Filter After-sales 
Regeneration Procedure: For Diesel Engine Model in Section 1C”.
If the fault is still present, substitute a known-good ECM and recheck.

1A-345 Engine General Information and Diagnosis: For Diesel Engine Model

Troubleshooting

DTC P1480: Upstream Side Differential Pressure Sensor Failure

S6JB0A1124134

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

S6JB0A1124146

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

• Fault appears following several failed regeneration attempts when driving, or if the weight of soot in the filter is 

above 50 g.

• Do not start diesel particulate filter after-sales regeneration with SUZUKI scan tool.

Regeneration must absolutely be carried out when driving insofar as possible.
The diesel particulate filter warning light is displayed on the combination meter to show a risk of the filter 
becoming saturated.

Displaying on SUZUKI scan tool

Detecting condition

D1

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

CO0

Open circuit or short circuit to vehicle body ground

CC1

Short circuit to +12 V

Engine General Information and Diagnosis: For Diesel Engine Model 1A-346

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

Troubleshooting for CC1: Short circuit to +12 V

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

S6JB0A1124147

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

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.

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

CO0

Open circuit or short circuit to vehicle body ground

CC1

Short circuit to +12 V