Charging System Test
Diagnostic Instructions
Diagnostic Aids
Inadmissible high battery discharge may also a result from a
parasitic current drain.
Parasitic current drain dependent on:
| • |
Control module tracking
time |
For more information, refer to
Battery Electrical Drain/Parasitic Load Test .
Reference Information
Description and Operation
Charging System Description and Operation
Electrical Information Reference
Testing for Intermittent Conditions and Poor Connections
Special Tools
EL 42000 Battery Tester
For equivalent regional tools, refer to
Special Tools .
Circuit/System Verification
Engine running, observe the charge indicator on the instrument
cluster or message in the driver information center display. The
charge indicator on the instrument cluster should be turned OFF and
the driver information center display should not display any
charging system message.
Circuit/System Testing
| 1. |
Ignition ON, verify that no
G13 Generator or B18 Battery Current Sensor DTCs are set that may
cause a charging system concern. |
| 2. |
Ignition OFF, measure the
voltage across the battery terminals. The voltage should read 12.0
V or greater at room temperature. |
| 3. |
Connect battery and ensure
correct V-belt installation |
|
Note: Ensure vehicle
accessories are OFF for the next step and the battery is in a good
condition.
|
| 4. |
Test the B+ circuit and the
Ground circuit as listed below at operation temperature.
|
| |
• |
Engine running, increase
engine speed to 2 500 RPM. Measure the battery voltage at the G13
Generator terminal B+ X1 and C1 Battery terminal 31. The voltage
should be between 12.6-15.0 V. |
| |
• |
Engine running, increase
engine speed to 2 500 RPM. Turn ON all vehicle accessories. Measure
the battery voltage at the G13 Generator terminal B+ X1 and C1
Battery terminal 31. The voltage should be between 12.6-15.0
V. |
| ⇒ |
If not within specified range, proceed with step 5. If all the
circuit tests normal, proceed with step 6. |
| 5. |
Test both the B+ circuit and
the Ground circuit for an open/high resistance as listed
below. |
| |
• |
Engine running, increase
engine speed to 2 500 RPM. Turn ON all vehicle accessories. Test
for less than 0.5 V between the G13 Generator terminal B+ X1 and C1
Battery terminal 30. |
| ⇒ |
If greater than the specified value, test all B+ cable related
components and repair or replace the concerned part. |
| |
• |
Engine running, increase
engine speed to 2 500 RPM. Turn ON all vehicle accessories. Test
for less than 0.5 V between the G13 Generator housing and C1
Battery terminal 31. |
| ⇒ |
If greater than the specified value, verify the generator is
correctly mounted or replace the negative battery cable. If all the
circuit tests normal, proceed with step 6 |
| 6. |
Ignition OFF, disconnect the
X2 harness connector at the G13 Generator, increase engine speed to
2 500 RPM. Measure the battery voltage at the G13 Generator
terminal B+ X1 and C1 Battery terminal 31. The voltage should be
between 13.2-14.2 V. |
| ⇒ |
If not within specified range, proceed with
Component Testing before replacing the G13 Generator. |
| ⇒ |
If all the circuit tests normal, replace the K20
Engine Control Module. |
Component Testing
Dynamic Test
| 1. |
Connect a oscilloscope at the
G13 Generator terminal B+ X1 and the G13 Generator generator
housing. |
| 2. |
Engine run at 2 500
RPM. |
Repair Instructions
Perform the
Diagnostic Repair Verification after completing the diagnostic
procedure.
|
