Step 1: Customer Complaint Analysis
Record details of the problem (failure, complaint) and how it occurred as described by the customer. For this purpose,
use of such an inspection form will facilitate collecting information to the point required for proper analysis and
diagnosis.

Customer problem inspection form (Example)

NOTE
The form is a standard sample. It should be modified according to conditions characteristic of each
market.

I2RH01110010-02

1A-281 Engine General Information and Diagnosis: For Diesel Engine Model

Step 2: Visual Inspection
As a preliminary step, be sure to perform visual check of
the items that support proper function of the engine
referring to “Visual Inspection: For Diesel Engine Model”.

Step 3: DTC Check, Record and Clearance
First, check DTC, referring to “DTC Check: For Diesel
Engine Model”. If DTC is indicated, record and clear
DTC by referring to “DTC Clearance: For Diesel Engine
Model”.
Attempt to diagnose a trouble based on DTC in this step
only or failure to clear the DTC in this step will lead to
incorrect diagnosis, trouble diagnosis of a normal circuit
or difficulty in troubleshooting.

Step 4: Engine Basic Inspection and Fault Finding-
Customer Complaints
Perform basic engine check according to “Engine Basic
Inspection: For Diesel Engine Model” first. When the end
of the flow table has been reached, check the parts of
the system suspected as a possible cause referring to
“Fault Finding-Customer Complaints: For Diesel Engine
Model” and based on symptoms appearing on the
vehicle (symptoms obtained through steps of customer
complaint analysis, trouble symptom confirmation and/or
basic engine check) and repair or replace faulty parts, if
any.

Step 5: Recheck DTC
Refer to “DTC Check: For Diesel Engine Model” for
checking procedure.

Step 6: Troubleshooting for DTC (See each DTC
Diag. Flow)
Based on the DTC indicated in Step 5 and referring to
the applicable DTC diag. flow, locate the cause of the
trouble, namely in a sensor, switch, wire harness,
connector, actuator, ECM or other part and repair or
replace faulty parts.

Step 7: Intermittent Problems Check
Check parts where an intermittent trouble is easy to
occur (e.g., wire harness, connector, etc.), referring to
“Intermittent and Poor Connection Inspection in Section
00” and related circuit of DTC recorded in Step 2.

Step 8: Final Confirmation Test
Confirm that the problem symptom has gone and the
engine is free from any abnormal conditions. If what has
been repaired is related to the DTC, clear the DTC once
and then recheck DTC and confirm that no DTC is
indicated.

DTC Check

S6JB0A1124005

1) Prepare SUZUKI scan tool or OBD generic scan

tool.

2) Connect it to data link connector (DLC) (1) located

on underside of instrument panel at driver’s seat
side.

Special tool
(A): SUZUKI scan tool

3) Turn ignition switch ON.
4) Read DTC, according to instructions displayed on

scan tool and print them or write them down. Refer to
scan tool operator’s manual for further details.
If communication between scan tool and ECM is not
possible, check if scan tool is communicable by
connecting it to ECM in another vehicle.
If communication is possible in this case, scan tool is
in good condition. Then check data link connector
and serial data line (circuit) in the vehicle with which
communication was not possible.

5) After completing the check, turn ignition switch OFF

and disconnect scan tool from data link connector.

DTC Clearance

S6JB0A1124006

NOTE
In case that DTC P0606 D6 can not be cleared
according to this procedure, clear DTC by
specified procedure described in “DTC
P0606: ECM Processor: For Diesel Engine
Model”.

1) Connect SUZUKI scan tool to data link connector in

the same manner as when making this connection
for DTC check.

2) Turn ignition switch OFF and then ON (but engine at

stop).

3) Erase DTC according to instructions displayed on

scan tool. Refer to scan tool operator’s manual for
further details.

4) After completing the clearance, turn ignition switch

OFF and disconnect scan tool from data link
connector.

(A)

I5JB0A110019-01

Engine General Information and Diagnosis: For Diesel Engine Model 1A-282

DTC Table

S6JB0A1124007

NOTE
For vehicle without diesel particulate filter, DTCs with asterisk (*) in table below are not detected.

DTC No.

(SUZUKI scan

tool)

Detecting Item

Detecting Condition

(DTC will set when detecting:)

)

P0016

CKP – CMP Correlation

CMP sensor signal frequency above a given
threshold.

)

P0033

Boost Pressure Control Solenoid Valve
Control Circuit

• Boost pressure control solenoid valve circuit

shorted to ground circuit

• Boost pressure control solenoid valve circuit

open or shorted to power circuit

)

P0089

Fuel Flow Actuator Performance

Fuel flow actuator control signal low or high input

)

P0100

Mass or Volume Air Flow Circuit

• MAF sensor circuit shorted to ground circuit
• MAF sensor circuit open or shorted to power

circuit

• Poor performance of MAF sensor

)

P0105

Barometric Pressure Circuit

Barometric pressure is lower or higher than
specification

)

P0110

IAT Sensor Circuit

IAT sensor 1 signal low or high input

)

P0115

ECT Circuit

ECT sensor signal low or high input

)

P0190

Fuel Pressure Sensor Circuit

• Fuel pressure sensor signal low or high input
• Poor performance of fuel pressure sensor

)

P0201

Fuel Injector No.1 Circuit

Fuel injector No.1 control signal circuit open or
short

)

P0202

Fuel Injector No.2 Circuit

Fuel injector No.2 control signal circuit open or
short

)

P0203

Fuel Injector No.3 Circuit

Fuel injector No.3 control signal circuit open or
short

)

P0204

Fuel Injector No.4 Circuit

Fuel injector No.4 control signal circuit open or
short

)

P0225

APP Sensor (Main) Circuit

• Accelerator pedal position (APP) sensor (main)

circuit shorted to ground circuit

• Accelerator pedal position (APP) sensor (main)

circuit open or shorted to power circuit

• Poor performance of Accelerator pedal position

(APP) sensor (main)

)

P0235

Boost Pressure Sensor Circuit

Boost pressure sensor signal low or high input

)

P0243

Boost Pressure Malfunction

Boost pressure out of specification

)

P0297

Vehicle Overspeed Condition

The vehicle was running while the after-sales
regeneration was in progress.

)

P0301

Cylinder No.1 Misfire Detected

Detection of engine speed fluctuation (problem on
cylinder No.1)

)

P0302

Cylinder No.2 Misfire Detected

Detection of engine speed fluctuation (problem on
cylinder No.2)

)

P0303

Cylinder No.3 Misfire Detected

Detection of engine speed fluctuation (problem on
cylinder No.3)

)

P0304

Cylinder No.4 Misfire Detected

Detection of engine speed fluctuation (problem on
cylinder No.4)

)

P0335

CKP Sensor Circuit

Crankshaft position sensor signal not inputted or
incorrect signal inputted

)

P0340

CMP Sensor Circuit

Camshaft position sensor signal not inputted or
inconsistent signal inputted

)

P0380

Glow Plug Control Module Circuit

Glow plug control signal low or high input

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