|
- Check battery (Refer to GROUP 54A - Battery - On-vehicle Service - Battery Test
).
|
|
Q.
Is the check result normal?
|
|
- Disconnect connector, and measure at harness side.
- Ignition switch: "ON"
- Voltage between terminal engine-ECU ALTL line and body earth.
|
|
Q.
Is the check result normal?
|
|
- Check power supply line for open/short circuit.
|
|
Q.
Is the check result normal?
|
|
Repair or replace the connector, or repair the damaged harness wire.
|
|
|
|
Q.
Does the trouble symptom persist?
|
|
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
|
|
|
|
- Check power supply line for damage.
|
|
Q.
Is the check result normal?
|
|
Repair or replace the connector, or repair the damaged harness wire.
|
|
|
|
- Disconnect connector, and measure at alternator side.
- Connect special tool Test Harness (MB991658) to all terminals except the terminal engine-ECU ALTG line.
- Ignition switch: "ON"
- Voltage between terminal engine-ECU ALTG line and body earth.
|
|
Q.
Is the check result normal?
|
|
- Check output line for short circuit.
|
|
Q.
Is the check result normal?
|
|
Repair or replace the connector, or repair the damaged harness wire.
|
|
|
|
- Disconnect engine-ECU connector, and connect special tool power plant ECU check harness (MB992110) to measure at connector for inspection.
- Engine: Idle operation after warm-up
- Transmission: P range
- Cooling fan: Not operated
- Voltage between terminal ALTG and body earth.
|
|
OK: The voltage increases when the headlamp switch and the rear window defogger switch are turned "ON" from "OFF".
|
|
Q.
Is the check result normal?
|
|
Intermittent malfunction (Refer to GROUP 00 - How to Use Troubleshooting/Inspection Service Points - How to Cope with Intermittent Malfunctions ).
|
|
|