DESCRIPTION
While the ignition switch is off, battery voltage is supplied to terminal BATT of the ECM for storing DTCs and fuel injection feedback learning values.
| DTC Detection Drive Pattern | DTC Detection Condition | Trouble Area |
|---|---|---|
| Ignition switch ON for 3 seconds | Condition (a) or (b) continues (1 trip detection logic): (a) Significant decrease in battery voltage (b) Open in back-up power source circuit |
|
Tech Tips
If DTC P0560 appears, the ECM does not store other DTCs.
WIRING DIAGRAM
INSPECTION PROCEDURE
Note
After replacing the ECM, the new ECM needs registration Click here and initialization Click here.
Inspect the fuses for circuits related to this system before performing the following inspection procedure.
PROCEDURE
CHECK ECM (BATT VOLTAGE)
| *a | Component with harness connected (ECM) |
Measure the voltage according to the value(s) in the table below.
| Standard Voltage | ||||||
|---|---|---|---|---|---|---|
|
| NG |
|
CHECK HARNESS AND CONNECTOR (ECM - BATTERY) Click here |
| OK |
|
CHECK FOR INTERMITTENT PROBLEMS Click here
CHECK HARNESS AND CONNECTOR (ECM - BATTERY)
Disconnect the ECM connector.
Disconnect the cable from the negative (-) battery terminal.
Disconnect the cable from the positive (+) battery terminal.
Measure the resistance according to the value(s) in the table below.
| Standard Resistance (Check for Open) | ||||||
|---|---|---|---|---|---|---|
|
| Standard Resistance (Check for Short) | ||||||
|---|---|---|---|---|---|---|
|
Reconnect the ECM connector.
Reconnect the cable to the positive (+) battery terminal.
Reconnect the cable to the negative (-) battery terminal.
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (ECM - BATTERY) |
| OK |
|
INSPECT BATTERY
Check that the battery is not depleted.
| OK |
|---|
| Battery is not depleted. |
| NG |
|
REPAIR OR REPLACE BATTERY |
| OK |
|
REPLACE ECM