The Multi-Center Display Does Not Show Any Information
Multi-Center Display Power Supply And Ground Circuit:
Connectors:
CIRCUIT OPERATION
The multi-center display is energized by the battery through the ignition switch (ACC) and (IG1).
TECHNICAL DESCRIPTION (COMMENT)
The ground circuit, the battery circuit, the ignition switch (ACC) circuit or the ignition switch (IG1) circuit is suspected to be open or defective.
TROUBLESHOOTING HINTS
- Malfunction of the multi-center display
- Damaged harness wires and connectors
DIAGNOSIS
Required Special Tool:
MB991223: Harness Set
STEP 1. Check the multi-center display ground circuit at the multi-center display connector C-09.
1. Disconnect the multi-center display connector C-09 and measure at the harness side.
2. Resistance between terminal 6 and ground.
- Should be less than 2 Ohms.
If open circuit, go to Step 2.
If less than 2 Ohms, go to Step 4.
STEP 2. Check the multi-center display connector C-09 for damage.
If the multi-center display connector C-09 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The multi-center display should work normally.
If the connector is in good condition, go to Step 3.
STEP 3. Check the harness wires between multi-center display connector C-09 and ground.
NOTE: After checking joint connector C-78, check the wires. If joint connector C-78 is damaged, repair or replace it. Refer to Harness Connector Inspection.
If the harness wires between multi-center display connector C-09 and ground are damaged, repair them.
The multi-center display should work normally.
STEP 4. Check the multi-center display power supply circuit (battery) at the multi-center display connector C-09.
1. Disconnect the multi-center display connector C-09 and measure at the harness side.
2. Voltage between terminal 1 and ground.
- Voltage should be approximately 12 volts (battery positive voltage).
If not approximately 12 volts, go to Step 5. If approximately 12 volts, go to Step 7.
STEP 5. Check the multi-center display connector C-09 for damage.
If the multi-center display connector C-09 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The multi-center display should work normally.
If the connector is in good condition, go to Step 6.
STEP 6. Check the harness wires between C-09 and battery.
NOTE: After checking joint connector C-78 and intermediate connector C-89, check the wires. If joint connector C-78 and intermediate connector C-89 are damaged, repair or replace them. Refer to Harness Connector Inspection.
If the harness wires between C-09 and battery are damaged, repair them.
The multi-center display should work normally.
STEP 7. Check the multi-center display power supply circuit [ignition switch (ACC)] at the multi-center display connector C-09.
1. Disconnect the multi-center display connector C-09 and measure at the harness side.
2. Turn the ignition switch to "ACC" position.
3. Voltage between terminal 3 and ground.
- Voltage should be approximately 12 volts (battery positive voltage).
If not approximately 12 volts, go to Step 8.
If approximately 12 volts, go to Step 10.
STEP 8. Check multi-center display connector C-09 for damage.
If multi-center display connector C-09 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The multi-center display should work normally.
If the connector is in good condition, go to Step 9.
STEP 9. Check the harness wires between C-09 and ignition switch (ACC).
NOTE: After checking joint connector C-78 and junction block connector C-101 and C-104, check the wires. If joint connector C-78 and junction block connector C-101 and C-104 are damaged, repair or replace them. Refer to Harness Connector Inspection.
If the harness wires between C-09 and ignition switch (ACC) are damaged, repair them.
The multi-center display should work normally.
STEP 10. Check the multi-center display power supply circuit [ignition switch (IG1)] at the multi-center display connector C-09.
1. Disconnect the multi-center display connector C-09 and measure at the harness side.
2. Turn the ignition switch to "ON" position.
3. Voltage between terminal 2 and ground.
- Voltage should be approximately 12 volts (battery positive voltage).
If not approximately 12 volts, go to Step 11.
If approximately 12 volts, replace the multi-center display. The multi-center display should work normally.
STEP 11. Check the multi-center display connector C-09 for damage.
If the multi-center display connector C-09 is damaged, repair or replace it. Refer to Harness Connector Inspection.
The multi-center display should work normally.
If the connector is in good condition, go to Step 12.
STEP 12. Check the harness wires between C-09 and ignition switch (IG1).
NOTE: After checking joint connector C-78 and junction block connector C-101 and C- 104, check the wires. If joint connector C-78 and junction block connector C-101 and C-104 are damaged, repair or replace them. Refer to Harness Connector Inspection.
If the harness wires between C-09 and ignition switch (IG1) are damaged, repair them.
The multi-center display should work normally.