Suzuki Grand Vitara JB419. Manual — part 21

Engine General Information and Diagnosis: 1A-61

DTC P0560: System Voltage Malfunction

S5JB0B1104119

NOTE

• Conditions for applying fault finding procedures to stored faults:

The fault is declared present following a road test or after attempting to start the engine several
times.

• ECM operating voltage: 9 V < operating voltage < 16 V.
• Battery voltage that is too low can cause the level 1 fault warning light to come on thereby causing

other faults to appear.

• It is then not possible to start the engine.
• 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 1.DEF: Overvoltage

Troubleshooting for 2.DEF: Undervoltage

Displaying on SUZUKI scan tool

Detecting condition

1.DEF

Overvoltage

2.DEF

Undervoltage

Check the charge circuits:
Condition of the battery.
Condition of the alternator (full fault finding).
Carry out the necessary repairs.

With ignition switch OFF, measure the voltage across the battery terminals.
If the voltage is less than 11.5 V, test the battery.
If the battery is faulty, replace the battery then test the charge circuit.
With ignition switch ON and the with the starter motor turning, measure the voltage across the battery terminals.
If the voltage drops below 9.6 V, check the tightness and condition of the battery terminals.
Repair if necessary.
If the terminals are in good condition, test the battery.
If they are faulty, replace the battery.
If the starter is cranking the engine correctly, but the fault is still present,
Check the continuity and for the absence of interference resistance on the following connections:
• Between “E33-6” wire of main relay mounting connector and “C86-3” terminal of ECM connector
• Between “E33-6” wire of main relay mounting connector and “E66-2” terminal of ECM connector
• Between “E66-1”, “E66-7” and “E66-8” terminals of ECM connector and ground terminal at battery

Repair if necessary.

1A-62 Engine General Information and Diagnosis:

DTC P0571: Brake Switch “A” Circuit Malfunction

S5JB0B1104120

CAUTION

!

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

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

• 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 1.DEF: Open circuit or short circuit

Troubleshooting for 2.DEF: Inconsistency of signal

Displaying on SUZUKI scan tool

Detecting condition

1. DEF

Open circuit or short circuit

2. DEF

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: 1A-63

DTC P0575: Cruise Control Input Circuit Malfunction

S5JB0B1104121

CAUTION

!

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

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

• 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 / PCM Processor Malfunction

S5JB0B1104122

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”.
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 6.DEF, 8.DEF, 12.DEF 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 6.DEF 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 Malfunction” 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”.

• 1.DEF: Inconsistency of signal
• 2.DEF: Inconsistent vehicle speed
• 3.DEF: 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-64 Engine General Information and Diagnosis:

Detecting Condition

Troubleshooting for 1.DEF: Permanent high level, 8.DEF: Signal outside upper limit, 10.DEF: Fuel injector
control, 12.DEF: Injection fault under deceleration and 13.DEF: 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 11.DEF: 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

1.DEF

Permanent high level

2.DEF

Permanent low signal

3.DEF

Configuration absent or incorrect

4.DEF

Analogue/digital converter fault

5.DEF

Communication disrupted

6.DEF

EEPROM fault

7.DEF

Watchdog Activation

8.DEF

Signal outside upper limit

10.DEF

Fuel injector control

11.DEF

Fuel injector control condenser fault

12.DEF

Injection fault under deceleration

13.DEF

Initialisation error

14.DEF

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.