Suzuki XL7 2007 Service Manual page 3114

10B-38 Data Communications:
Circuit/System Testing
NOTE
You must perform the Circuit/System
Verification before proceeding with Circuit/
System Testing.
1. Inspect the Ign Switch fuse for open. The fuse
should be OK.
➢ If the fuse is open, test the following circuits for a
short to ground, if all circuits test OK, replace the
BCM.
– Battery positive voltage of the ignition switch
– Accessory voltage
– Off/Run crank voltage
– Ignition 1 voltage
2. Disconnect the ignition switch connector.
3. Test for battery positive voltage between the battery
positive voltage circuit of the ignition switch and
ground.
➢ If less than battery positive voltage, repair the
circuit for an open/high resistance
NOTE
The ignition switch component test must be
preformed before proceeding with this test to
verify the integrity of the switch.
Component Testing
Ignition Switch
Using the Resistance Test below, check the resistance between the pins of the ignition switch listed in each switch
position listed.
➢ If any reading is other than specified, replace the ignition switch.
Resistance Test
Ignition Switch Position
Off Key Out
Off Key IN
Accessory
Run
Start
Repair Instructions
Perform the "Diagnostic Repair Verification - Vehicle Diagnostic Information: " after completing the repair.
• "Control Module References: " for module replacement, setup, and programming
• "Ignition and Start Switch Replacement: "
Pins 3 and 1 Pins 3 and 2
Infinite Infinite
Infinite Infinite
Infinite < 5.0 ohms
< 5.0 ohms < 5.0 ohms
< 5.0 ohms Infinite
4. Perform the ignition switch component test.
➢ If the ignition switch fails, replace the ignition
switch.
5. Ignition OFF, disconnect BCM connector C1, test for
less than 1.0 volt between the following circuits of
the BCM and ground.
6. Ignition key out, test for less than 1.0 volt between
the following circuits of the BCM and ground.
– Ignition key resistor signal
– Off/Run crank
– Accessory voltage
– Ignition 1 voltage
➢ If more than 1.0 volt, repair the circuit for a short to
voltage.
7. Test for less than 1.0 ohm of resistance between the
BCM and the ignition switch on the following circuits.
– Ignition key resistor signal
– Off/Run crank
– Accessory voltage
– Ignition 1 voltage
➢ If greater than 5 ohms, repair the circuit for open/
high resistance
8. Test for infinite resistance between the ignition key
resistor signal circuit of the BCM and ground.
➢ If less than infinite resistance, repair the signal
circuit for a short to ground.
9. Replace the BCM.
Pins 3 and 5 Pins 3 and 4
Infinite
< 5.0 ohms
Infinite
Infinite
Infinite
Pins 5 and 4
Infinite Infinite
Infinite Infinite
Infinite Infinite
Infinite < 5.0 ohms
Infinite 1275-1325 ohms