Suzuki Grand Vitara JB627. Service manual - part 23

1A-41 Engine General Information and Diagnosis:

DTC Check

S6JB0B1104007

NOTE
The MIL is turned on when the ECM and/or
TCM detect malfunction(s). Each ECM and
TCM stores diagnostic information as the
diagnostic trouble code (DTC) in its memory
and outputs the DTC to the scan tool.
Therefore, check both of the ECM and TCM
for any DTC with the scan tool because the
DTC stored in ECM and TCM is not read and
displayed at a time. However, each of the
ECM and TCM needs not to be checked with
the generic scan tool because the DTC stored
in ECM and TCM is read and displayed at a
time.

1) Prepare OBD generic scan tool or SUZUKI scan

tool.

2) With ignition switch OFF, connect it to DLC (1)

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

Special tool
(A): SUZUKI scan tool

3) Turn ignition switch ON and confirm that MIL lights.
4) Read DTC and freeze frame data 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

S6JB0B1104008

1) With ignition switch OFF, connect OBD generic scan

tool or SUZUKI scan tool to DLC.

2) Turn ignition switch ON.
3) Erase DTC according to instructions displayed on

scan tool. Freeze frame data is cleared with the
DTC. 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.

NOTE
DTC and freeze frame data stored in ECM
memory are also cleared in the following
cases. Be careful not to clear them before
keeping their record.
• When power to ECM is cut off (by

disconnecting battery cable, removing
fuse or disconnecting ECM (connectors).

• When the same malfunction (DTC) is not

detected again during 40 engine warm-up
cycles (refer to Warm-Up Cycle of “On-
Board Diagnostic System Description”).

(A)

I5JB0C110021-02

Engine General Information and Diagnosis: 1A-42

Fail-Safe Table

S6JB0B1104009

When any of the following DTCs is detected, ECM enters fail-safe mode as long as malfunction continues to exist but
that mode is cancelled when ECM detects normal condition after that.

DTC No.

Detected item

Fail-safe operation

)

P0031 HO2S Heater Control Circuit Low (Bank 1 Sensor 1)

• ECM stops air/fuel ratio control.
• ECM stops A/F sensor heater

control.

)

P0032 HO2S Heater Control Circuit High (Bank 1 Sensor 1)

)

P0051 HO2S Heater Control Circuit Low (Bank 2 Sensor 1)

)

P0052 HO2S Heater Control Circuit High (Bank 2 Sensor 1)

)

P2237 O2 Sensor Positive Current Control Circuit / Open (Bank 1 Sensor 1)

)

P2238 O2 Sensor Positive Current Control Circuit Low (Bank 1 Sensor 1)

)

P2239 O2 Sensor Positive Current Control Circuit High (Bank 1 Sensor 1)

)

P2240 O2 Sensor Positive Current Control Circuit / Open (Bank 2 Sensor 1)

)

P2241 O2 Sensor Positive Current Control Circuit Low (Bank 2 Sensor 1)

)

P2242 O2 Sensor Positive Current Control Circuit High (Bank 2 Sensor 1)

)

P2252 O2 Sensor Negative Current Control Circuit Low (Bank 1 Sensor 1)

)

P2253 O2 Sensor Negative Current Control Circuit High (Bank 1 Sensor 1)

)

P2255 O2 Sensor Negative Current Control Circuit Low (Bank 2 Sensor 1)

)

P2256 O2 Sensor Negative Current Control Circuit High (Bank 2 Sensor 1)

)

P0133 O2 Sensor Circuit Slow Response (Bank 1 Sensor 1)

• ECM stops air/fuel ratio control.

)

P0134 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 1)

)

P0153 O2 Sensor Circuit Slow Response (Bank 2 Sensor 1)

)

P0154 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 1)

)

P2195 O2 Sensor Signal Stuck Lean (Bank 1 Sensor 1)

)

P2196 O2 Sensor Signal Stuck Rich (Bank 1 Sensor 1)

)

P2197 O2 Sensor Signal Stuck Lean (Bank 2 Sensor 1)

)

P2198 O2 Sensor Signal Stuck Rich (Bank 2 Sensor 1)

)

P2A00 O2 Sensor Circuit Range/Performance (Bank 1 Sensor 1)

)

P2A03 O2 Sensor Circuit Range/Performance (Bank 2 Sensor 1)

)

P0037 HO2S Heater Control Circuit Low (Bank 1 Sensor 2)

• ECM stops HO2S-2 control.
• ECM stops A/F sensor heater

control.

)

P0038 HO2S Heater Control Circuit High (Bank 1 Sensor 2)

)

P0057 HO2S Heater Control Circuit Low (Bank 2 Sensor 2)

)

P0058 HO2S Heater Control Circuit High (Bank 2 Sensor 2)

)

P0137 O2 Sensor Circuit Low Voltage (Bank 1 Sensor 2)

• ECM stops HO2S-2 control.

)

P0138 O2 Sensor Circuit High Voltage (Bank 1 Sensor 2)

)

P0140 O2 Sensor Circuit No Activity Detected (Bank 1 Sensor 2)

)

P0157 O2 Sensor Circuit Low Voltage (Bank 2 Sensor 2)

)

P0158 O2 Sensor Circuit High Voltage (Bank 2 Sensor 2)

)

P0160 O2 Sensor Circuit No Activity Detected (Bank 2 Sensor 2)

)

P2A01 O2 Sensor Circuit Range/Performance (Bank 1 Sensor 2)

)

P2A04 O2 Sensor Circuit Range/Performance (Bank 2 Sensor 2)

)

P0101 Mass Air Flow Circuit Range/Performance

• ECM controls injector drive time

(fuel injection volume) according
to engine speed and throttle valve
operation angle.

• ECM stops air/fuel ratio control.
• ECM stops EGR valve control.

)

P0102 Mass Air Flow Circuit Low Input

)

P0103 Mass Air Flow Circuit High Input

)

P0107 Manifold Absolute Pressure Circuit Low Input

• ECM stops EGR valve control.

)

P0108 Manifold Absolute Pressure Circuit High Input

)

P1107 MAP Sensor Rationality Check-Low

)

P1108 MAP Sensor Rationality Check-High

)

P0111 Intake Air Temperature Sensor Circuit Performance

• ECM controls actuators assuming

that intake air temperature is 40

°C (104 °F).

• ECM stops EGR valve control.

)

P0112 Intake Air Temperature Sensor Circuit Low

)

P0113 Intake Air Temperature Sensor Circuit High

1A-43 Engine General Information and Diagnosis:

)

P0116 Engine Coolant Temperature Circuit Range / Performance

• ECM controls actuators assuming

that engine coolant temperature
is 80

°C (176 °F) and operates

radiator cooling fan is high speed.

• ECM stops air/fuel ratio control.
• ECM stops EGR valve control.
• ECM stops A/C control.

)

P0117 Engine Coolant Temperature Circuit Low

)

P0118 Engine Coolant Temperature Circuit High

)

P0122 Throttle Position Sensor (Main) Circuit Low

• ECM turns off throttle actuator

control relay and throttle valve is
fixed at the opening of about 10

from its completely closed
position (default opening).

• ECM controls fuel cut at specified

engine speed.

)

P0123 Throttle Position Sensor (Main) Circuit High

)

P0222 Throttle Position Sensor (Sub) Circuit Low

)

P0223 Throttle Position Sensor (Sub) Circuit High

)

P2101 Throttle Actuator Control Motor Circuit Range / Performance

)

P2102 Throttle Actuator Control Motor Circuit Low

)

P2103 Throttle Actuator Control Motor Circuit High

)

P2108 Throttle Actuator Control Module Performance

)

P2119 Throttle Actuator Control Throttle Body Range / Performance

)

P0327 Knock Sensor Circuit Low

• ECM stops knock control.
• ECM controls ignition timing

according to engine speed.

)

P0328 Knock Sensor Circuit High

)

P0335 Crankshaft Position Sensor Circuit

• ECM stops EGR valve control.

)

P0336 Crankshaft Position Sensor Circuit Range / Performance

)

P0340 Camshaft Position Sensor Circuit

)

P0341 Camshaft Position Sensor Circuit Range / Performance

)

P0500 Vehicle Speed Sensor

• ECM controls actuators assuming

that vehicle speed is 10 km/h (6
mph).

)

P0532 A/C Refrigerant Pressure Sensor Circuit Low

• ECM stops A/C system control.

)

P0533 A/C Refrigerant Pressure Sensor Circuit High

)

P1603 TCM Trouble Code Detected

• ECM controls actuators assuming

that transmission range switch is
N position.

)

U0101 Lost Communication with TCM

)

P2122 Pedal Position Sensor (Main) Circuit Low

• ECM controls throttle valve using

that pedal position sensor (sub)
signal within specified range.

)

P2123 Pedal Position Sensor (Main) Circuit High

)

P2127 Pedal Position Sensor (Sub) Circuit Low

• ECM controls throttle valve using

that pedal position sensor (main)
signal within specified range.

)

P2128 Pedal Position Sensor (Sub) Circuit High

)

P2135 Throttle Position Sensor (Main / Sub) Voltage Correlation

• ECM controls throttle valve using

that throttle position sensor
(main) or throttle position sensor
(sub) signal within specified
range.

)

P2138 Pedal Position Sensor (Main / Sub) Voltage Correlation

• ECM controls throttle valve using

that pedal position sensor (main)
or pedal position sensor (sub)
signal within specified range.

)

P2227 Barometric Pressure Circuit Range / Performance

• ECM controls actuators assuming

that barometric pressure is 10
kPa (760 mmHg).

)

P2228 Barometric Pressure Circuit Low

)

P2229 Barometric Pressure Circuit High

)

P2627 O2 Sensor Pumping Current Trim Circuit Low (Bank 1 Sensor 1)

• ECM controls A/F sensor

assuming that A/F sensor
adjusting resister value is
specified value.

)

P2628 O2 Sensor Pumping Current Trim Circuit High (Bank 1 Sensor 1)

)

P2630 O2 Sensor Pumping Current Trim Circuit Low (Bank 2 Sensor 1)

)

P2631 O2 Sensor Pumping Current Trim Circuit High (Bank 2 Sensor 1)

)

U0121

Lost Communication with Electronic Stability Program / ABS Control
Module

• ECM stops torque reduction

control

DTC No.

Detected item

Fail-safe operation

Engine General Information and Diagnosis: 1A-44

Scan Tool Data

S6JB0B1104010

As the data values are standard values estimated on the basis of values obtained from the normally operating vehicles
by using a scan tool, use them as reference values. Even when the vehicle is in good condition, there may be cases
where the checked value does not fall within each specified data range. Therefore, judgment as abnormal should not
be made by checking with these data alone.
Also, conditions that can be checked by the scan tool are those detected by ECM and output from ECM as commands
and there may be cases where the engine or actuator is not operating (in the condition) as indicated by the scan tool.
Be sure to use the timing light to check the ignition timing. (Refer to “Ignition Timing Inspection in Section 1H”)

NOTE

• With the generic scan tool, only star (*) marked data in the following table can be read.
• When checking the data with the engine running at idle or racing, be sure to shift M/T gear to the

neutral gear position and A/T gear to the “Park” position and pull the parking brake fully. Also, if
nothing or “no load” is indicated, turn OFF A/C (if equipped with A/C), all electric loads, P/S and all
the other necessary switches.

)

U0140 Lost Communication with Body Control Module

• ECM stops A/C system control.
• ECM controls engine speed not

using electric load signal.

• ECM stops keyless start system

control.

Scan tool data

Vehicle condition

Normal condition /

reference values

)

COOLANT TEMP