STEP 1. Using scan tool (M.U.T.-IIISE), check the special Function.
STEP 2. Check ECALL speaker.
STEP 3. Resistance measurement at the ECALL relay box assembly connector (ESO-, ESO+ terminals).
(1) Disconnect the ECALL relay box assembly connector, and measure at the wiring harness side.
(2) Check the resistance between the ECALL relay box assembly connector (ESO- terminal) and (ESO+ terminal).OK: 1.5 - 70 ohms
(3) Check the resistance between the ECALL relay box assembly connector (ESO+ terminal) and body ground.OK: No continuity
Is the check result normal?
Replace the ECALL relay box assembly (Refer to ). Repair the connector(s) or wiring harness.
STEP 4. Voltage measurement at the ECALL relay box assembly connector (IG, GND terminals).
(1) Disconnect the ECALL relay box assembly connector, and measure at the wiring harness side.
(2) Turn the ignition switch from OFF position to ON position.
(3) Check the voltage between the ECALL relay box assembly connector (IG terminal) and (GND terminal).OK: The voltage should measure approximately 12 volts (battery positive voltage).
Is the check result normal?
Correct the IG line circuit or GND circuit of the ECALL relay box assembly. Go to Step 5.
STEP 5. Check front door speaker (RH).
STEP 6. Resistance measurement at the ECALL relay box assembly connector (terminals No. 11, 12).
(1) Disconnect the ECALL relay box assembly connector, and measure at the wiring harness side.
(2) Check the resistance between the ECALL relay box assembly connector (DSO+ terminal) and (DSO- terminal).OK: 1.5 - 70 ohms
(3) Check the resistance between the ECALL relay box assembly connector (DSO+ terminal) and body ground.OK: No continuity
Is the check result normal?
Go to Step 7. Repair the connector(s) or wiring harness.
STEP 7. Voltage measurement at the ECALL relay box assembly connector (RLE1, RLE2 terminals).
(1) Disconnect the ECALL relay box assembly connector, and measure at the wiring harness side.
(2) Turn the ignition switch from OFF position to ON position.
(3) caution | Execute item No. 4 "Door speaker check (Beep)" in the scan tool (M.U.T.-IIISE) special function "Test", and measure the voltage. |
Check the voltage between the ECALL relay box assembly connector (RLE1 terminal) and body ground.
OK: Approximately 5 volts
(4) Check the voltage between the ECALL relay box assembly connector (RLE2 terminal) and body ground.OK: Approximately 5 volts
Is the check result normal?
Replace the ECALL relay box assembly (Refer to ). Replace the TCU (Refer to ).
STEP 8. Resistance measurement at the TCU connector (SPO+, SPO- terminals).
(1) Disconnect the TCU connector, and measure at the wiring harness side.
(2) Check the resistance between the TCU connector (SPO+ terminal) and (SPO- terminal).OK: 1.5 - 70 ohms
(3) Check the resistance between the TCU connector (SPO+ terminal) and body ground.OK: No continuity
Is the check result normal?
Go to Step 10. Go to Step 9.
STEP 9. Resistance measurement at the TCU connector (SPO+, SPO- terminals).
(1) Disconnect the TCU connector and the ECALL relay box assembly connector, and measure at the wiring harness side.
(2) Check the resistance between the TCU connector (SPO+ terminal) and the ECALL relay box assembly connector (ESI+ terminal).OK: The resistance should be 2 ohms or less
(3) Check the resistance between the TCU connector (SPO- terminal) and the ECALL relay box assembly connector (ESI- terminal).OK: The resistance should be 2 ohms or less
(4) Check the resistance between the TCU connector (SPO+ terminal) and body ground.OK: No continuity
(5) Check the resistance between the TCU connector (SPO- terminal) and body ground.OK: No continuity
Is the check result normal?
Replace the ECALL relay box assembly (Refer to ). Repair the connector(s) or wiring harness.
STEP 10. Retest the system.