Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 96

1A-331 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P0615: Ignition Switch Circuit

S6JB0A1124124

NOTE

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

The fault is declared present after several starting attempts, or with the engine running.

• Computer operating voltage: 9 V < operating voltage < 16 V.
• Battery voltage that is too low can cause the Injection warning light (gravity 1 warning light) to come 

on thereby causing other faults to appear.

• 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

Voltage outside permitted range of values

Check continuity and make sure there is no interference resistance on the following connection:
• Between “E82-23” wire of junction block connector and “E66-11” terminal of ECM connector
Repair if necessary.
• Check the condition of “IG COIL” fuse located on the junction block assembly.

Check the condition of the “FI” fuse located on a fuse box No.2.
Repair if necessary.

• If the fault does not reappear, start the engine and wait 1 min.

Carry out a road test and check the system faults.
If there are no faults, fault finding is complete.
If the fault is still present, substitute a known-good ECM and recheck.

Engine General Information and Diagnosis: For Diesel Engine Model 1A-332

DTC P0627: Fuel Pump Control Circuit

S6JB0A1124148

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.
• This fuel pump is just for balancing the fuel level between the two chambers left side and right side 

of the fuel tank.

 

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

Troubleshooting for CC1: Short circuit to +12 V

Displaying on SUZUKI scan tool

Detecting condition

CO0

Open circuit or short circuit to vehicle body ground

CC1

Short circuit to +12 V

Check the condition of the fuel pump relay.
Check the ECM connections.
Repair if necessary.
Check the fuel pump relay mounting connections.
If these checks are correct,
Check the continuity and insulation from vehicle body ground of the following connections:
• Between “E28-4” wire of fuel pump relay mounting connector and “C85-21” terminal of ECM connector
• Between “E28-3” wire of fuel pump relay 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 fuel pump relay.
Check the ECM connections.
Repair if necessary.
Check the fuel pump relay mounting connections.
Check the continuity and insulation from +12 V of the following connection:
• Between “E28-4” wire of fuel pump relay mounting connector and “C85-21” terminal of ECM connector
Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.

1A-333 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P0638: Inlet Throttle Valve Control Range / Performance

S6JB0A1124125

CAUTION

!

 

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

 

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present after:
– The engine is started.
– A  road  test.
– Output test “Electronic Throttle valve” on SUZUKI scan tool.
– Turning OFF ignition switch and waiting 40 seconds.

• If the fault is present:

– It is difficult or even impossible to start the vehicle.
– The engine stops noisily.
– The Injection warning light (gravity 1 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”.

Detecting Condition

Troubleshooting for CC1: Short circuit to +12 V

NOTE
After any inlet throttle valve procedures, it is necessary to perform “Initialize inlet throttle valve data” 
on SUZUKI scan tool. Then turn OFF ignition switch and wait 40 seconds.

 

Displaying on SUZUKI scan tool

Detecting condition

CC1

Short circuit to +12 V

CC0

Short circuit to vehicle body ground

CO

Open circuit

CC

Short circuit

D1

Internal electronic fault

D2

External diagnostics

D3

Values out of range

Check the connections of the inlet throttle valve.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation from +12 V of the following connection:
• Between “C75-1” wire of inlet throttle valve connector and vehicle body ground
• Between “C75-3” wire of inlet throttle valve connector and “C86-40” terminal of ECM connector
• Between “C75-4” wire of inlet throttle valve connector and “C86-27” terminal of ECM connector
Repair if necessary.
If the fault persists, replace the inlet throttle valve.

Engine General Information and Diagnosis: For Diesel Engine Model 1A-334

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

NOTE
After any inlet throttle valve procedures, it is necessary to perform “Initialize inlet throttle valve data” 
on SUZUKI scan tool.
Inlet throttle valve fault adaptives. Then turn OFF ignition switch and wait 40 seconds.

 

Troubleshooting for CC: Short circuit

NOTE
After any inlet throttle valve procedures, it is necessary to perform “Initialize inlet throttle valve data” 
on SUZUKI scan tool.
Inlet throttle valve fault adaptives. Then turn OFF ignition switch and wait 40 seconds.

 

Check the connections of the inlet throttle valve.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation from vehicle body ground of the following connections:
• Between “C75-3” wire of inlet throttle valve connector and “C86-40” terminal of ECM connector
• Between “C75-2” wire of inlet throttle valve connector and “E33-6” wire of main relay mounting connector
• Between “C75-4” wire of inlet throttle valve connector and “C86-27” terminal of ECM connector
Repair if necessary.
If the fault persists, replace the inlet throttle valve.

Check the connections of the inlet throttle valve.
Check the ECM connections.
Repair if necessary.
Check the continuity, absence of interference resistance and insulation on the following connection:
• Between “C75-1” wire of inlet throttle valve connector and vehicle body ground
• Between “C75-2” wire of inlet throttle valve connector and “E33-6” wire of main relay mounting connector
• Between “C75-3” wire of inlet throttle valve connector and “C86-40” terminal of ECM connector
• Between “C75-4” wire of inlet throttle valve connector and “C86-27” terminal of ECM connector
Repair if necessary.
If the fault persists, replace the inlet throttle valve.