Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 102

1A-355 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P242A: Exhaust Gas Temperature Sensor 1 Circuit

S6JB0A1124142

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault becomes present if:
– The engine is started with a speed greater than 1750 rpm and a fuel flow greater than 30 mg/str.
– Or following a road test.

• If the fault is present:

– The EGR function is inhibited.
– Diesel particulate filter regenerations are inhibited.
– The vehicle performances are reduced.
– 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

CO

Open circuit

CC1

Short circuit to +12 V

D1

Signal outside upper limit

Check the continuity, absence of interference resistance and insulation from +12 V of the following connection:
• Between “C73-1” wire of exhaust gas temperature sensor 1 connector and “C85-5” terminal of ECM

connector

• Between “C73-2” wire of turbocharger upstream temperature sensor connector and “C85-22” terminal of ECM

connector

Repair if necessary.
Check the continuity, the absence of interference resistance and the insulation from vehicle body ground of the
following connection:
• Between “C73-1” wire of exhaust gas temperature sensor 1 connector and “C85-5” terminal of ECM

connector

Repair if necessary.
Check for the presence of ground on “C73-2” wire of the turbocharger upstream temperature sensor yellow
connector.
Check the exhaust gas temperature sensor 1 resistance between “C73-1” and “C73-2” terminals of the yellow
connector according to parameter “Turbo upst temp.” on Data List of SUZUKI scan tool.

exhaust gas temperature sensor 1 resistance:
1572 – 1972

Ω at 400 °C, 752 °F

675 – 775

Ω at 500 °C, 932 °F

343 – 383

Ω at 600 °C, 1112 °F

197 – 217

Ω at 700 °C, 1292 °F

126 – 136

Ω at 800 °C, 1472 °F

84 – 94

Ω at 900 °C, 1652 °F

If the recorded values do not correspond to the above values, replace the exhaust gas temperature sensor 1.
If the fault is still present, substitute a known-good ECM and recheck.

Engine General Information and Diagnosis: For Diesel Engine Model 1A-356

DTC P242B: Exhaust Gas Temperature Sensor 1 Regulation Failure

S6JB0A1124143

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 becomes present if:
– The engine is started with a speed greater than 1750 rpm and a fuel flow greater than 30 mg/str.
– Or following a road test.

• If the fault is present:

– Diesel particulate filter regenerations are inhibited.
– The vehicle performances are reduced.
– 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

D1

Parameter at maximum limit

D2

Temperature measured too high

Check the continuity, absence of interference resistance and insulation from +12 V of the following connection:
• Between “C73-1” wire of exhaust gas temperature sensor 1 connector and “C85-5” terminal of ECM

connector

• Between “C73-2” wire of exhaust gas temperature sensor 1 connector and “C85-22” terminal of ECM

connector

Repair if necessary.
Check the continuity, the absence of interference resistance and the insulation from vehicle body ground of the
following connection:
• Between “C73-1” wire of exhaust gas temperature sensor 1 connector and “C85-5” terminal of ECM

connector

Repair if necessary.
Check for the presence of ground on “C73-2” wire of the exhaust gas temperature sensor 1 connector.
Check the sensor resistance between “C73-1” and “C73-2” terminals of the connector according to parameter
“Turbo upst temp.” on Data List of SUZUKI scan tool.

exhaust gas temperature sensor 1 resistance:
1572 – 1972

Ω at 400 °C, 752 °F

675 – 775

Ω at 500 °C, 932 °F

343 – 383

Ω at 600 °C, 1112 °F

197 – 217

Ω at 700 °C, 1292 °F

126 – 136

Ω at 800 °C, 1472 °F

84 – 94

Ω at 900 °C, 1652 °F

If the recorded values do not correspond to the above values, replace the exhaust gas temperature sensor 1.
If the fault is still present, substitute a known-good ECM and recheck.

1A-357 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P2600: Turbocharger Electric Water Pump Control Circuit

S6JB0A1124144

NOTE

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

The fault is declared present after ignition switch has been turned OFF and after an interval of 40
seconds, or after output test “Turbo charger cooling pump” on SUZUKI scan tool.

• If the fault is present:

– The EGR function is inhibited.
– 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 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 “T/C P” fuse on the fuse box No.2.
Check the condition of the turbocharger electric water pump relay.
Check the ECM connections.
Repair if necessary.
Check the turbocharger electric water pump relay mounting connections.
If these checks are correct,
Check the continuity and insulation from vehicle body ground of the following connections:
• Between “E34-10” wire of turbocharger electric water pump relay mounting connector and “C86-41” terminal

of ECM connector

• Between “E34-8” wire of turbocharger electric water pump relay mounting connector and “E33-6” wire of main

relay connector

• Between “E34-6” wire of turbocharger electric water pump relay mounting connector and “E38-1” wire of fuse

box No.2 mounting connector

• Between “E34-7” wire of turbocharger electric water pump relay mounting connector and “C70-2” wire of

turbocharger electric water pump connector

Check for the ground on “C70-1” wire of the turbocharger electric water pump connector.Repair if necessary.
If the fault is still present, substitute a known-good ECM and recheck.

Check the condition of the turbocharger electric water pump relay.
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 “E34-10” wire of turbocharger electric water pump relay mounting connector and “C86-41” terminal

of ECM connector

• Between “C70-1” wire of turbocharger electric water pump connector and vehicle body ground
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-358

DTC P3031: Exhaust Gas Temperature Sensor 2 Threshold Overshoot Failures During After-sales
Regeneration

S6JB0A1124152

CAUTION

!

• The fault is present because the exhaust gas temperature sensor 2 detects over 700

°C, 1292 °F

while the diesel particulate filter after-sales regeneration was in progress.
Carry out an 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.

• 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
If the fault is present, the diesel particulate filter after-sales regeneration in progress fails.

Fault Finding-Customer Complaints

S6JB0A1124153

NOTE
Before carrying out the procedures associated with customer complaints, check for the absence of
faults and the conformity (or otherwise) of the parameters and statuses, using SUZUKI scan tool. If the
customer complaint is not eliminated, then proceed according to the corresponding fault finding chart.

Table 1: No dialogue with the ECM
Table 2: The Engine Does Not Start
Table 3: The Engine Starts with Difficulty
Table 4: Injection Noise
Table 5: Poor Performance with Smoke
Table 6: Poor Performance without Smoke
Table 7: Irregular Engine Operation
Table 8: Fuel System Leaks
Table 9: Rough idle
Table 10: Oil leaks from the turbocharger