Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 88

1A-299 Engine General Information and Diagnosis: For Diesel Engine Model

Troubleshooting for CO1: Open circuit or short circuit to +12 V

Troubleshooting for CC0: Short circuit to vehicle body ground

Check the MAF sensor assembly with IAT sensor connections.
Check the ECM connections.
Repair if necessary.
Check the continuity of the following connection:
• Between “C13-4” wire of sensor assembly with IAT sensor connector and “E33-6” terminal of Main relay 

mounting connector

Repair if necessary.
Check the continuity and insulation against +12 V of the following connections:
• Between “C13-1” wire of MAF sensor assembly with IAT sensor connector and “C86-22” terminal of ECM 

connector

• Between “C13-2” wire of MAF sensor assembly with IAT sensor connector and “C86-24” terminal of ECM 

connector

• Between “C13-5” wire of MAF sensor assembly with IAT sensor connector and “C86-47” terminal of ECM 

connector

• Between “C13-6” wire of MAF sensor assembly with IAT sensor connector and “C86-12” terminal of ECM 

connector

Repair if necessary.
Measure the air temperature sensor resistance between “C13-1” and “C13-2” terminals of the MAF sensor 
assembly with IAT sensor connector.

Replace the MAF sensor assembly with IAT sensor if the resistance displayed is not:
3553 – 3875 

Ω at –10 °C, –14 °F

2352 – 2544 

Ω at 20 °C, 68 °F

1612 – 1730 

Ω at 30 °C, 86 °F

Check the connections of the MAF sensor assembly with IAT sensor.Check the ECM connections.
Repair if necessary.
Check the continuity and insulation against vehicle body ground of the connection between:
• Between “C13-1” wire of MAF sensor assembly with IAT sensor connector and “C86-22” terminal of ECM 

connector

• Between “C13-2” wire of MAF sensor assembly with IAT sensor connector and “C86-24” terminal of ECM 

connector

• Between “C13-5” wire of MAF sensor assembly with IAT sensor connector and “C86-47” terminal of ECM 

connector

• Between “C13-4” wire of MAF sensor assembly with IAT sensor connector and “E33-6” terminal of main relay 

mounting connector

Repair if necessary.
Measure the air temperature sensor resistance between “C13-1” and “C13-2” terminals of the MAF sensor 
assembly with IAT sensor connector.

Replace the MAF sensor assembly with IAT sensor if the resistance displayed is not:
3553 – 3875 

Ω at –10 °C, –14 °F

2352 – 2544 

Ω at 20 °C, 68 °F

1612 – 1730 

Ω at 30 °C, 86 °F

Engine General Information and Diagnosis: For Diesel Engine Model 1A-300

DTC P0115: ECT Circuit

S6JB0A1124095

NOTE

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

– When an attempt is made to start the engine
– With the engine running

• If the fault is present:

– The coolant temperature: “Coolant Temp” on Data List of SUZUKI scan tool is fixed at 118.1 

°C, 

244.6 

°F with engine running, 0.1 °C, 32 °F with engine stopping

– The preheating phase is greater than 10 seconds,
– The radiator fan is continuously operated,
– 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

Displaying on SUZUKI scan tool

Detecting condition

CC0

Short circuit to vehicle body ground

CO1

Open circuit or short circuit to +12 V

Check the connections of the “C09-4” terminal of ECT sensor connector.
Check the ECM connections.
Repair if necessary.
Measure the resistance of the ECT sensor between “C09-1” and “C09-4” terminals of its connector.

Replace the sensor if its resistance is not approximately:
68780 – 82780 

Ω at –40 °C, –40 °F

12338 – 12582 

Ω at –10 °C, –14 °F

2140 – 2364 

Ω at 25 °C, 77 °F

772 – 850 

Ω at 50 °C, 122 °F

275 – 291 

Ω at 80 °C, 176 °F

112 – 118 

Ω at 110 °C, 230 °F

85 – 89 

Ω at 120 °C, 248 °F

Check for the insulation, continuity and the absence of interference resistance on the connections:
• Between “C09-1” wire of ECT sensor connector and “C86-23” terminal of ECM connector
• Between “C09-2” wire of ECT sensor connector and “C86-11” terminal of ECM connector
Repair if necessary.
If the fault is still present, replace the ECT sensor.

1A-301 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P0190: Fuel Pressure Sensor Circuit

S6JB0A1124096

NOTE

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

The fault is declared present after repeated engine starts or with the engine running.

• Use service wire for all operations on the controller connectors.
• If the fault is present:

– The engine will stop immediately.
– It is impossible to restart.
– The Red stop warning light (gravity 2 warning light) is lit.

• Priorities when dealing with a number of faults:

As a priority, deal with fault “DTC P0697: Sensor Reference Voltage 3 Circuit: For Diesel Engine 
Model” if the fault 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 CC0: Short circuit to vehicle body ground

Troubleshooting for CO1: Open circuit or short circuit to +12 V

Displaying on SUZUKI scan tool

Detecting condition

CC0

Short circuit to vehicle body ground

CO1

Open circuit or short circuit to +12 V

D1

Offset at minimum threshold

Check the fuel pressure sensor connectors.
Check the ECM connections.
Repair if necessary.
Check the continuity and insulation from vehicle body ground of the following connections:
• Between “C84-2” wire of fuel pressure sensor connector and “C86-32” terminal of ECM connector
• Between “C84-3” wire of fuel pressure sensor connector and “C86-48” terminal of ECM connector
Repair if necessary.
If the fault is still present, replace the fuel pressure sensor with common rail referring to “Common Rail (High 
Pressure Fuel Injection Rail) Removal and Installation: For Diesel Engine Model in Section 1G”.

Check the fuel pressure sensor connectors.
Check the ECM connections.
Repair if necessary.
Check for continuity and insulation from the +12 V feed on the following connections:
• Between “C84-2” wire of fuel pressure sensor connector and “C86-32” terminal of ECM connector
• Between “C84-1” wire of fuel pressure sensor connector and “C86-46” terminal of ECM connector
• Between “C84-3” wire of fuel pressure sensor connector and “C86-48” terminal of ECM connector
Repair if necessary.
If the fault is still present, replace the fuel pressure sensor with common rail referring to “Common Rail (High 
Pressure Fuel Injection Rail) Removal and Installation: For Diesel Engine Model in Section 1G”.

Engine General Information and Diagnosis: For Diesel Engine Model 1A-302

Troubleshooting for D1: Offset at minimum threshold

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 “C84-2” wire of fuel pressure sensor connector and “C86-32” terminal of ECM connector
• Between “C84-3” wire of fuel pressure sensor connector and “C86-48” terminal of ECM connector
• Between “C84-1” wire of fuel pressure sensor connector and “C86-46” terminal of ECM connector
Repair if necessary.
With ignition switch ON and the engine stationary for more than one minute:
• Check for fuel pressure sensor output voltage between “C84-2” and “C84-1” wire of fuel pressure sensor 

connector.
– If the voltage is above 0.5V, the sensor is in order.

• In this case, substitute a known-good ECM and recheck.

– If the voltage is below 0.5V, replace the fuel pressure sensor with common rail referring to “Common Rail 

(High Pressure Fuel Injection Rail) Removal and Installation: For Diesel Engine Model in Section 1G”.