Suzuki Grand Vitara JB416 / JB420 / JB419. Manual — part 65

1A-207 Engine General Information and Diagnosis: For Petrol Engine Model

DTC P2127: Pedal Position Sensor (Sub) Circuit Low Input

S6JB0A1114075

Wiring Diagram
Refer to “DTC P2122: Pedal Position Sensor (Main) Circuit Low Input: For Petrol Engine Model”.

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Keep the accelerator pedal at idle position for 2 seconds.
4) Keep the accelerator pedal at fully depressed position for 2 seconds.
5) Repeat Step 3) and 4) for 3 times.
6) Check DTC.

9

Ground circuit check
1) Remove ECM from its bracket with ECM connectors

connected.

2) Check for proper connection of ECM connector at “E23-

54” terminal.

3) If OK, measure resistance between “E23-54” terminal of

ECM connector and engine ground.

Is resistance below 3

Ω

?

“ORN” wire is open or
high resistance circuit.

Faulty ECM ground
circuit. If circuit is OK,
substitute a known-
good ECM and recheck.

10 Accelerator pedal position (APP) sensor assembly

check
1) Check accelerator pedal position sensor (main) referring

to “Accelerator Pedal Position (APP) Sensor Assembly
Inspection: For Petrol Engine Model in Section 1C”.

Is output voltage within specified value?

Substitute a known-
good ECM and recheck.

Replace accelerator
pedal position (APP)
sensor assembly.

Step

Action

Yes

No

DTC detecting condition

Trouble area

Output voltage of accelerator pedal position sensor (sub)
is less than 0.2 V for 0.5 seconds continuously.
(1 driving detection logic)

• Accelerator pedal position (APP) sensor (sub) circuit
• Accelerator pedal position (APP) sensor assembly
• ECM
• Incorrect mounting of accelerator pedal (APP) sensor

assembly

Engine General Information and Diagnosis: For Petrol Engine Model 1A-208

DTC Troubleshooting

NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting: For Petrol Engine Model”.

Step

Action

Yes

No

1

Was “Engine and Emission Control System Check”
performed?

Go to Step 2.

Go to “Engine and
Emission Control
System Check: For
Petrol Engine Model”.

2

Accelerator pedal position (APP) sensor assembly
mounting check
1) Check that accelerator pedal position (APP) sensor

assembly has been mounted to vehicle body properly
(no pinched floor carpet, etc).

Is it OK?

Go to Step 3.

Reinstall accelerator
pedal position (APP)
sensor assembly
properly referring to
“Accelerator Pedal
Position (APP) Sensor
Assembly Removal and
Installation: For Petrol
Engine Model in Section
1C”.

3

Accelerator pedal position sensor (sub) and its circuit
check
1) Connect scan tool to DLC with ignition switch turned

OFF.

2) Turn ON ignition switch, check “APP Sensor 2 Volt”

displayed on scan tool.

Is displayed voltage below 0.1 V?

Go to Step 4.

Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.

4

ECM voltage check
1) Disconnect connector from accelerator pedal position

(APP) sensor assembly with ignition switch turned OFF.

2) Check for proper connection to accelerator pedal

position (APP) sensor assembly at “ORN/BLU”, “BLU/
GRN” and “BLU/YEL” wire terminals.

3) If OK, measure voltage between “ORN/BLU” wire

terminal of accelerator pedal position (APP) sensor
assembly connector and vehicle body ground with
ignition switch turned ON.

Is voltage 4 – 6 V?

Go to Step 7.

Go to Step 5.

“BLU/GRN”

“BLU/YEL”

“ORN”

“WHT/BLU”

“WHT”

“ORN BLU”

I5JB0A110071-01

1A-209 Engine General Information and Diagnosis: For Petrol Engine Model

5

ECM voltage check
1) Turn OFF ignition switch.
2) Remove ECM from its bracket with ECM connectors

connected.

3) Check for proper connection of ECM connector at “E23-

53” terminal.

4) If OK, measure voltage between “E23-53” terminal of

ECM connector and engine ground with ignition switch
turned ON.

Is voltage 4 – 6 V?

“ORN/BLU” wire is open
or high resistance
circuit.

Go to Step 6.

6

Wire harness check
1) Disconnect connectors from ECM with ignition switch

turned OFF.

2) Measure resistance between “E23-53” terminal of ECM

connector and engine ground.

Is resistance infinity?

Substitute a known-
good ECM and recheck.

“ORN/BLU” wire is
shorted to ground
circuit.

7

Wire harness check
1) Disconnect connectors from ECM with ignition switch

turned OFF.

2) Check for proper connection of ECM connector at “E23-

54”, “E23-52” and “E23-51” terminals.

3) If OK, measure resistance between “BLU/GRN” wire

terminal of accelerator pedal position (APP) sensor
assembly connector and vehicle body ground.

Is resistance infinity?

Go to Step 8.

“BLU/GRN” wire is
shorted to ground
circuit.

8

Wire harness check
1) Measure resistance between “E23-52” and each “E23-

54”, “E23-51” terminals of ECM connector with ignition
switch turned OFF.

Is each resistance infinity?

Go to Step 9.

“BLU/GRN” wire is
shorted to “ORN” wire
and/or “BLU/YEL” wire
circuit.

9

Wire harness check
1) Measure resistance between “BLU/GRN” wire terminal

of accelerator pedal position (APP) sensor assembly
connector and “E23-52” terminal of ECM connector with
ignition switch turned OFF.

Is resistance below 3

Ω

?

Go to Step 10.

“BLU/GRN” wire is open
or high resistance
circuit.

10 Accelerator pedal position (APP) sensor assembly

check
1) Check accelerator pedal position sensor (sub) referring

to “Accelerator Pedal Position (APP) Sensor Assembly
Inspection: For Petrol Engine Model in Section 1C”.

Is output voltage within specified value?

Substitute a known-
good ECM and recheck.

Replace accelerator
pedal position (APP)
sensor assembly.

Step

Action

Yes

No

Engine General Information and Diagnosis: For Petrol Engine Model 1A-210

DTC P2128: Pedal Position Sensor (Sub) Circuit High Input

S6JB0A1114076

Wiring Diagram
Refer to “DTC P2122: Pedal Position Sensor (Main) Circuit Low Input: For Petrol Engine Model”.

DTC Detecting Condition and Trouble Area

DTC Confirmation Procedure

1) With ignition switch turned OFF, connect scan tool.
2) Turn ON ignition switch and clear DTC using scan tool.
3) Keep the accelerator pedal at idle position for 2 seconds.
4) Keep the accelerator pedal at fully depressed position for 2 seconds.
5) Repeat Step 3) and 4) for 3 times.
6) Check DTC.

DTC Troubleshooting

NOTE
Before this trouble shooting is performed, read the precautions for DTC troubleshooting referring to
“Precautions for DTC Troubleshooting: For Petrol Engine Model”.

DTC detecting condition

Trouble area

Output voltage of accelerator pedal position sensor (sub)
is more than 4.8 V for 0.5 seconds continuously.
(1 driving detection logic)

• Accelerator pedal position (APP) sensor (sub) circuit
• Accelerator pedal position (APP) sensor assembly
• ECM
• Incorrect mounting of accelerator (APP) sensor

assembly

Step

Action

Yes

No

1

Was “Engine and Emission Control System Check”
performed?

Go to Step 2.

Go to “Engine and
Emission Control
System Check: For
Petrol Engine Model”.

2

Accelerator pedal position (APP) sensor assembly
mounting check
1) Check that accelerator pedal position (APP) sensor

assembly has been mounted to vehicle body properly
(no pinched floor carpet, etc).

Is it OK?

Go to Step 3.

Reinstall accelerator
pedal position (APP)
sensor assembly
properly referring to
“Accelerator Pedal
Position (APP) Sensor
Assembly Removal and
Installation: For Petrol
Engine Model in Section
1C”.

3

Accelerator pedal position sensor (sub) and its circuit
check
1) Connect scan tool to DLC with ignition switch turned

OFF.

2) Turn ON ignition switch, check “APP Sensor 2 Volt”

displayed on scan tool.

Is displayed voltage 4.8 V or more?

Go to Step 4.

Intermittent trouble.
Check for intermittent
referring to “Intermittent
and Poor Connection
Inspection in Section
00”.