Suzuki Grand Vitara JB416 / JB420 / JB419. Manual - part 95

1A-327 Engine General Information and Diagnosis: For Diesel Engine Model

DTC P0571: Brake Light Switch Circuit

S6JB0A1124120

CAUTION

!

 

• This fault may appear if the wiring harness has been damaged.

Follow the procedure described in “Electrical Circuit Inspection Procedure in Section 00”.

• This check enables the condition and the conformity of the engine wiring harness to be checked.

 

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present after the brake pedal is depressed, or during a road test.

• If the fault is present, the cruise control/speed limiter is deactivated.
• 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 D1: Open circuit or short circuit

Troubleshooting for D2: Inconsistency of signal

Displaying on SUZUKI scan tool

Detecting condition

D1

Open circuit or short circuit

D2

Inconsistency of signal

Check the connections of the brake lamp switch.
Check the condition and adjustment of the brake lamp switch.
Repair if necessary.
Check the conformity of the brake lamp switch:
• Brake pedal released:

– Continuity between “E67-1” and “E67-2” terminals of brake lamp switch.
– Infinite resistance across “E67-3” and “E67-4” terminals of brake lamp switch.

• Brake pedal depressed:

– Infinite resistance across “E67-1” and “E67-2” terminals of brake lamp switch.
– Continuity between “E67-3” and “E67-4” terminals of brake lamp switch.

Replace the switch if necessary.
Check the condition of “STOP” fuse on the junction block assembly.
Replace the fuse if necessary.
Check the feeds to the switch:
• Between “E67-2” wire of the brake lamp switch connector and “E82-20” terminal of BCM connector
• Between “E67-4” wire of the brake lamp switch connector and “E33-6” wire of main relay mounting connector
Replace the switch if necessary.
Check the continuity and insulation of the following connections:
• Between “E67-1” wire of brake lamp switch connector and “E66-28” terminal of ECM connector
Repair if necessary.

Check the connections of the brake lamp switch.
Check the condition and adjustment of the brake lamp switch.
Repair if necessary.
Check the continuity and make sure there is no interference resistance on the following connection:
• Between “E67-1” wire of brake lamp switch connector and “E66-28” terminal of ECM connector
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-328

DTC P0575: Cruise Control Input Circuit

S6JB0A1124121

CAUTION

!

 

• This fault may appear if the wiring harness has been damaged.

Follow the procedure described in “Electrical Circuit Inspection Procedure in Section 00”.

• This check enables the condition and the conformity of the engine wiring harness to be checked.

 

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present after the engine is started or following a road test.

• The cruise control/speed limiter function is inhibited.
• Use service wire for all operations on the ECM connectors.

 

Detecting Condition

Troubleshooting

DTC P0606: ECM Processor

S6JB0A1124122

NOTE

• DTC P0606 D6 (current) will be detected rarely even if system is in normal condition when 

connecting battery with IG ON and it can’t be cleared using normal procedure described in “DTC 
Clearance: For Diesel Engine Model”.
In this case, clear DTC P0606 D6 as follows.
a. Connect SUZUKI scan tool to DLC with IG switch OFF.
b. Turn IG switch to ON position.
c. Select “Clear DTC (current P0606 D6)” under “Trouble Code” mode of SUZUKI scan tool and 

follow instructions displayed on SUZUKI scan tool.

• Conditions for applying fault finding procedures to stored faults:

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

• If D6, D8 or D12 is present, the Injection warning light (gravity 1 warning light) is lit.
• If one of the other faults is present, the Red stop warning light (gravity 2 warning light) is lit.
• If D6 is still present, the Malfunction indicator light (MIL) will come on after three consecutive driving 

cycles (starting +5 seconds + turn OFF ignition switch and wait 40 seconds.).

• Use service wire for all operations on the ECM connectors.
• Priority when dealing with a number of faults:

Deal with fault “DTC P0560: System Voltage: For Diesel Engine Model” first if it 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”.

Displaying on SUZUKI scan tool

Detecting Condition

D1

Inconsistency of signal

D2

Inconsistent vehicle speed

D3

Steering wheel controls

If the fault is declared present, refer to “Cruise Control System Symptom Diagnosis in Section 10A”.
Check that by pressing the buttons the statuses change and that with ignition switched on, all the values are 
correct.
If the fault is still present, substitute a known-good ECM and recheck.

1A-329 Engine General Information and Diagnosis: For Diesel Engine Model

Detecting Condition

Troubleshooting for D1: Permanent high level, D8: Signal outside upper limit, D10: Fuel injector control, D12: 
Injection fault under deceleration and D13: Initialisation error

NOTE

• Check the ECM connections and the continuity of all its supplies.

Repair if necessary.

• Clear the faults.
• Turn OFF ignition switch, wait 10 seconds and turn ON ignition switch again.

If the fault is still present, substitute a known-good ECM and recheck.

 

Troubleshooting for D11: Fuel injector control condenser fault

NOTE
If there are a number of faults, deal with the other system faults first.

 

Displaying on SUZUKI scan tool

Detecting condition

D1

Permanent high level

D2

Permanent low signal

D3

Configuration absent or incorrect

D4

Analogue/digital converter fault

D5

Communication disrupted

D6

EEPROM fault

D7

Watchdog Activation

D8

Signal outside upper limit

D10

Fuel injector control

D11

Fuel injector control condenser fault

D12

Injection fault under deceleration

D13

Initialisation error

D14

Open circuit or internal electronic fault

Step

Action

Yes

No

1

Is there DTC P0606: ECM / PCM Processor Malfunction of 
10.DEF: Fuel injector control?

Go to Step 2.

Substitute a known-
good ECM and recheck.

2

Check the battery voltage using “Battery Voltage” on Data 
list of SUZUKI scan tool.

Is battery voltage more than 10V?

Go to Step 3.

Check the charge circuit 
and carry out the 
necessary repairs:
Check the condition of 
the battery terminals.
Carry out fault finding 
on the alternator.
Recharge or replace the 
battery.

3

Check the condition of the wiring harness between the 
computer and the battery, carry out the necessary repairs.
• Start the vehicle.
• Clear the stored faults.
• Check the faults.

Is there DTC P0606: ECM / PCM Processor Malfunction?

Substitute a known-
good ECM and recheck.

End of fault finding.

Engine General Information and Diagnosis: For Diesel Engine Model 1A-330

DTC P0611: ECM Performance

S6JB0A1124123

NOTE

• Condition for applying fault finding ONLY to a present fault:

The fault is declared present after:
– Reprogramming the ECM.
– Replacing and programming the ECM.

• If the fault is present:

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

 

Detecting Condition

Troubleshooting for D1: Internal electronic fault when writing

Troubleshooting for D2: No code in memory

NOTE
This fault appears on any blank computer (new or recently reprogrammed).

 

Displaying on SUZUKI scan tool

Detecting condition

D1

Internal electronic fault when writing

D2

No code in memory

• Program the fuel injector codes referring to “Registration Procedure for the Fuel Injector Calibration Code: For 

Diesel Engine Model in Section 1C”.

• If the fault is still present after turning ignition switch OFF and waiting 40 seconds, then a new dialogue.

Program the fuel injector codes again.
If the fault is still present, substitute a known-good ECM and recheck.

• Otherwise clear the fault memory using DTC clearance on SUZUKI Scan tool referring to “DTC Clearance: 

For Diesel Engine Model”.

• Program the fuel injector codes referring to “Registration Procedure for the Fuel Injector Calibration Code: For 

Diesel Engine Model in Section 1C”.

• If the fault is still present after turning ignition switch OFF and waiting 40 seconds, then a new dialogue.

Program the fuel injector codes again.
If the fault is still present, substitute a known-good ECM and recheck.

• Otherwise clear the fault memory using DTC clearance on SUZUKI Scan tool referring to “DTC Clearance: 

For Diesel Engine Model”.