STEP 1. Check battery current sensor itself
STEP 2. Measure the sensor supply voltage at battery current sensor harness side connector.
(1) Disconnect the battery current sensor connector and measure at the harness side.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal ECB5 line and ground.- Voltage should be between 4.9 and 5.1 volts.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the measured voltage between 4.9 and 5.1 volts?
Go to Step 5. Go to Step 3.
STEP 3. Check of short to ground and open circuit in ECB5 line between battery current sensor and ECM connector.
STEP 4. Using scan tool (M.U.T.-III), read the diagnostic trouble code (DTC).
caution | To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III). |
(1) Connect scan tool (M.U.T.-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) . (2) Turn the ignition switch to the "ON" position.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC P1608 stored?
Replace the ECM (Refer to Removal and Installation ). Then go to Step 9. It can be assumed that this malfunction is intermittent. Refer to GROUP 00, How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions .
STEP 5. Check the continuity at battery current sensor harness side connector.
STEP 6. Check of open circuit and harness damage in ECBE line between battery current sensor connector and ECM connector.
STEP 7. Check of harness damage in ECB5 line between battery current sensor connector and ECM connector.
STEP 8. Check of short to ground, open circuit and harness damage in ECB line between battery current sensor connector and ECM connector.
STEP 9. Using scan tool (M.U.T.-III), read the diagnostic trouble code (DTC).
caution | To prevent damage to scan tool (M.U.T.-III), always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool (M.U.T.-III). |
(1) Connect scan tool (M.U.T.-III). Refer to HOW TO CONNECT THE SCAN TOOL (M.U.T.-III) . (2) Start the engine and run at idle.
(3) After the DTC has been deleted, read the DTC again.
(4) Turn the ignition switch to the "LOCK" (OFF) position.
Is the DTC P1608 stored?
Retry the troubleshooting. The inspection is complete.