Suzuki Grand Vitara JB419. Service manual — part 14

Engine General Information and Diagnosis: 1A-33

DTC P0105: Manifold Absolute Pressure / Barometric Pressure Circuit Malfunction

S5JB0B1104093

NOTE

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

The fault is declared present:
– When an attempt is made to start the engine
– With the engine running

• The barometric pressure sensor is built into the ECM, and cannot be separated.

If the fault is present:
– There is light smoke at the exhaust.
– The atmospheric pressure value changes to safe mode, “Barometric Pres” on Data List of SUZUKI

scan tool = 1000 hPa.

– The Injection warning light (gravity 1 warning light) is lit.

• Use service wire for all operations on the controller connectors.

Detecting Condition

Troubleshooting

DTC P0110: Intake Air Temperature Sensor 1 Circuit Malfunction

S5JB0B1104094

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present after an attempted start, or with the engine running.

• If the fault is present:

– The air temperature value changes to safe mode, “Intake Air Temp” on Data List of SUZUKI scan

tool = 45.1

°C, 113.2 °F.

– The EGR function is 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

Displaying on SUZUKI scan tool

Detecting condition

1.DEF

Signal outside upper limit

2.DEF

Signal outside lower limit

3.DEF

Inconsistent signal

Disconnect the ECM and check the condition of its contacts and connector.
Repair if necessary.
Display the value of parameter “Turbo Pressure” on Data List of SUZUKI scan tool.
If this value is stuck at 1000 hPa, refer to interpretation of fault “DTC P0235: Turbo / Super Charger Boost
Sensor “A” Circuit Malfunction”.
If the fault is still present, substitute a known-good ECM and recheck.

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

1A-34 Engine General Information and Diagnosis:

Troubleshooting for CO.1: Open circuit or short circuit to +12 V

Troubleshooting for CC.0: 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: 1A-35

DTC P0115: Engine Coolant Temperature Circuit Malfunction

S5JB0B1104095

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

CC.0

Short circuit to vehicle body ground

CO.1

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-36 Engine General Information and Diagnosis:

DTC P0190: Fuel Rail Pressure Sensor Circuit Malfunction

S5JB0B1104096

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 “C” Circuit / Open Malfunction”
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 CC.0: Short circuit to vehicle body ground

Troubleshooting for CO.1: Open circuit or short circuit to +12 V

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

1.DEF

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 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 in Section 1G”.