STEP 2. Charging system check
STEP 3. Scan tool (M.U.T.-III) other system DTC
(1) 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). |
Connect scan tool (M.U.T.-III). Refer to "How to connect the Scan Tool (M.U.T.-III)
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(2) Check if DTC is set in the ETACS-ECU.
Is the DTC set?
Troubleshoot the ETACS. Refer to GROUP 54A - ETACS
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Go to Step 4
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STEP 4. Voltage measurement at the ASC-ECU connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the voltage between ASC-ECU connector (+BV terminal) and body ground.OK: The voltage should measure approximately 12 volts (battery positive voltage).
Is the check result normal?
Go to Step 6
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Go to Step 5
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STEP 5. Check of short to power supply, short to ground, and open circuit in +BV line between fusible link and ASC-ECU connector
STEP 6. Voltage measurement at the ASC-ECU connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Measure the voltage between ASC-ECU connector (+BM terminal) and body ground.OK: The voltage should measure approximately 12 volts (battery positive voltage).
Is the check result normal?
Go to Step 8
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Go to Step 7
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STEP 7. Check of short to power supply, short to ground, and open circuit in +BM line between fusible link and ASC-ECU connector
STEP 8. Voltage measurement at the ASC-ECU connector.
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Turn the ignition switch to the ON position.
(3) Measure the voltage between ASC-ECU connector (IG1 terminal) and body ground.OK: The voltage should measure approximately 12 volts (battery positive voltage).
Is the check result normal?
Go to Step 10
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Go to Step 9
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STEP 9. Check of short to power supply, short to ground, and open circuit in IG1 line between ETACS-ECU and ASC-ECU connector
STEP 10. Resistance measurement at ASC-ECU connector
(1) Disconnect the connector, and measure at the wiring harness side.
(2) Resistance between the ASC-ECU connector (GND1 terminal) and the body ground, and between the ASC-ECU connector (GND2 terminal) and the body groundOK: The resistance should be 2 ohms or less
Is the check result normal?
Go to Step 12
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Go to Step 11
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STEP 11. Check of open circuit in GND1, GND2 line between ASC-ECU connector and body ground
STEP 12. Retest the system.
STEP 13. Retest the system.