Inspection Procedure 3

INSPECTION PROCEDURE 3: Odometer and trip meter are not displayed.

Combination Meter Power Supply Circuit (Part 1):

Combination Meter Power Supply Circuit (Part 2):

CIRCUIT OPERATION
The combination meter is energized by the battery through ignition switch (IG1).

TECHNICAL DESCRIPTION (COMMENT)
If the odometer and trip meter are not displayed or no needle meters work, power supply and ground system to the combination meter, or the combination meter itself may be defective.

POSSIBLE CAUSES
- The wiring harness or connectors may have loose, corroded, or damaged terminals, or terminals pushed back in the connector
- Malfunction of the combination meter

DIAGNOSIS

Required Special Tools:
- MB991223: Harness set
- MB992006: Extra Fine Probe

STEP 1. Check combination meter connector C-04 for loose, corroded or damaged terminals, or terminals pushed back in the connector.







Q: Is combination meter connector C-04 in good condition?

YES : Go to Step 2.

NO : Repair or replace the component(s). The combination meter works normally.

STEP 2. Measure at combination meter connector C-04 in order to power supply circuit to combination meter (battery power supply).







1. Disconnect combination meter connector C-04, and measure at the wiring harness side.







2. Measure the voltage between terminal 10 and ground.
- The voltage should measure approximately 12 volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery positive voltage)?

YES : Go to Step 4.

NO : Go to Step 3.

STEP 3. Check the wiring harness between combination meter connector C-04 (terminal 10) and the battery.







NOTE: Also check intermediate connector C-24 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If intermediate connector C-24 is damaged, repair or replace.

Q: Is the wiring harness between combination meter connector C-04 (terminal 10) and the battery in good condition?

YES : Retest the system.

NO : Repair the wiring harness. Check that the combination meter is normally.

STEP 4. Measure the voltage at combination meter connector C-04 in order to power supply circuit to combination meter (IG1 power supply).







1. Disconnect combination meter connector C-04, and measure at the wiring harness side.
2. Turn the ignition switch to "ON" position.







3. Measure the voltage between terminal 11 and ground.
- The voltage should measure approximately 12 volts (battery positive voltage).

Q: Is the measured voltage approximately 12 volts (battery positive voltage)?

YES : Go to Step 6.

NO : Go to Step 5.

STEP 5. Check the wiring harness between combination meter connector C-04 (terminal 11) and the ignition switch (IG1).












NOTE: Also check joint connector (2) C-01, junction block connector C-202 and C-215 for loose, corroded, or damaged terminals, or terminals pushed back in the connector. If inspecting joint connector (2) C-01 or junction block connector C-202 or C-215 is damaged, repair or replace.

Q: Is the wiring harness between combination meter connector C-04 (terminal 11) and the ignition switch (IG1) in good condition?

YES : Retest the system.

NO : Repair the wiring harness. Check that the combination meter is normally.

STEP 6. Measure the resistance at combination meter connector C-04 in order to the ground circuit to the combination meter.







1. Disconnect combination meter connector C-04, and measure at the wiring harness side.







2. Measure the resistance value between terminal 1 and ground.
- The resistance should be 2 ohms or less.

Q: Is the measured resistance 2 ohms or less?

YES : Go to Step 8.

NO : Go to Step 7.

STEP 7. Check the wiring harness between combination meter connector C-04 (terminal 1) and ground.







Q: Is the wiring harness between combination meter connector C-04 (terminal 1) and ground in good condition?

YES : Retest the system.

NO : Repair the wiring harness. Check that the combination meter is normally.

STEP 8. Retest the system.

Q: Is the check result satisfactory?

YES : The procedure is complete. (If no malfunctions are found in all steps, an intermittent malfunction is suspected.)

NO : Replace the combination meter.