C1395
DTC C1395: Brake fluid filling not completedCAUTION: If there is any problem in the CAN bus lines, an incorrect diagnostic trouble code may be set. Prior to this diagnosis, diagnose the CAN bus lines.
CIRCUIT OPERATION
The meter ECU detects the brake fluid level switch ON/OFF and controls the brake warning light ON/OFF.
ABS DTC SET CONDITIONS
This DTC is set when all of the following cases are met.
^ When the amount of the brake fluid is less than lower limit.
^ When the stop light switch is OFF.
^ When the vehicle speed is 30km/h or more and 90 km/h or less.
^ The acceleration G is 0.03 or more.
^ The other DTCs is not set
TROUBLESHOOTING HINTS (The most likely causes for these DTCs are to set are:)
Current trouble
^ Damaged wiring harness or connector
^ Malfunction of stop light switch
^ Malfunction of parking brake switch
^ Malfunction of the hydraulic unit (integrated with ABS-ECU)
^ Malfunction of the combination meter (integrated with meter ECU)
Past trouble
^ Carry out diagnosis with particular emphasis on connector(s) or wiring harness between the combination meter circuit (terminal 7) to the brake fluid level switch or parking brake switch. For diagnosis procedures, refer to "How to cope with past trouble".
DIAGNOSIS
Required Special Tools:
^ MB991958: Scan Tool (MUT-III Sub Assembly)
^ MB991824: Vehicle Communication Interface (V.C.I.)
^ MB991827: MUT-III USB Cable
^ MB991910: MUT-III Main Harness A
^ MB991970: ABS Check Harness
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1) Connect scan tool MB991958 to the data link connector.
2) Turn the ignition switch to the "ON" position.
3) Diagnose the CAN bus line.
4) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the CAN bus line found to be normal?
YES: Go to Step 3.
NO: Repair the CAN bus line. Then go to Step 2.
STEP 2. Recheck for diagnostic trouble code.
CAUTION: To prevent damage to scan tool MB991958, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991958.
1) Turn the ignition switch to the "ON" position.
2) Erase the DTC.
3) Turn the ignition switch to the "LOCK" (OFF) position.
4) Turn the ignition switch to the "ON" position.
5) Check if the DTC is set.
6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC C1395 set?
YES: Go to Step 3.
NO: The procedure is complete.
STEP 3. Check the brake warning light.
Check that the brake warning light illuminates with the parking brake lever pulled up.
Q: Does the brake warning light illuminate?
YES: Go to Step 4.
NO: Replace the hydraulic unit (integrated with ABS-ECU). Then go to Step 11.
STEP 4. Check the brake fluid amount.
Q: Is the brake fluid within lower and upper limits?
YES: Go to Step 5.
NO: Set the brake fluid within lower and upper limits. Then go to Step 11.
STEP 5. Check the brake warning light.
1) Disconnect brake fluid level switch connector B-07 and parking brake switch connector C-18.
2) Turn the ignition switch to the "ON" position.
Q: Does the brake warning light illuminate?
YES: Go to Step 6.
NO: Check the brake fluid level switch and parking brake switch, and replace them if necessary. Then go to Step 11.
STEP 6. Measure the resistance at combination meter connector C-101.
1) Disconnect the connector C-101
2) Measure the resistance between terminal 7 and ground. Check that the continuity does not exist.
Q: Does the continuity exist?
YES: Go to Step 7.
NO: Replace the combination meter (integrated with meter ECU). Then go to Step 11
STEP 7. Check intermediate connector A-13 and C-29, brake fluid level switch connector B-07, joint connector C-01, combination meter connector C-101 and parking brake switch connector C-1 8 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Is intermediate connector A-13 and C-29, brake fluid level switch connector B-07, joint connector C-01, combination meter connector C-01 and parking brake switch connector C-18 damaged?
YES: Repair or replace the damaged component(s). Then go to Step 11.
NO: Go to Step 8.
STEP 8. Check the harness wires between joint connector C-01 (terminal 28) and parking brake switch connector C-18 (terminal 1).
Q: Is the harness wires between joint connector C-01 (terminal 28) and parking brake switch connector C-18 (terminal 1) damaged?
YES: Repair the wiring harness. Then go to Step 11.
NO: Go to Step 9.
STEP 9. Check the harness wires between brake fluid level switch connector B-07 (terminal 1) and joint connector C-01 (terminal 27).
Q: Is the harness wires between brake fluid level switch connector B-07 (terminal 1) and joint connector C-01 (terminal 27) damaged?
YES: Repair the wiring harness. Then go to Step 11.
NO: Go to Step 10.
STEP 10. Check the harness wires between joint connector C-01 (terminal 26) and combination meter connector C-101 (terminal 7).
Q: Is the harness wires between joint connector C-01 (terminal 26) and combination meter connector C-101 (terminal 7) damaged?
YES: Repair the wiring harness. Then go to Step 11.
NO: Go to Step 11.
STEP 11. Recheck for diagnostic trouble code.
Check again if the DTC is set.
1) Turn the ignition switch to the "ON" position.
2) Erase the DTC.
3) Turn the ignition switch to the "LOCK" (OFF) position.
4) Turn the ignition switch to the "ON" position.
5) Check if the DTC is set.
6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC C1395 set?
YES: Replace the combination meter (integrated with meter ECU). Then go to Step 12 .
NO: It can be assumed that this malfunction is intermittent.
STEP 12. Recheck for diagnostic trouble code.
Check again if the DTC is set.
1) Turn the ignition switch to the "ON" position.
2) Erase the DTC.
3) Turn the ignition switch to the "LOCK" (OFF) position.
4) Turn the ignition switch to the "ON" position.
5) Check if the DTC is set.
6) Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is DTC C1395 set?
YES: Go to Step 1.
NO: The procedure is complete.