DTC 65
DTC 65: ABS Monitor SystemABS Monitor System Circuit:
CIRCUIT OPERATION
^ The AWD-ECU receives ABS operation condition from the ABS-ECU.
DTC SET CONDITIONS
^ DTC 65 is set when ABS is detected to be operating for more than 1 minute continuously.
TROUBLESHOOTING HINTS (THE MOST LIKELY CAUSES FOR THIS CODE TO BE SET ARE:)
^ Damaged harness and connector
^ Malfunction of the ABS-ECU
^ Malfunction of the AWD-ECU
DIAGNOSIS
Required Special Tool:
^ MB991958: Scan Tool (M.U.T-III Sub Assembly)
^ MB991824: V.C.I.
^ MB991827: USB Cable
^ MB991911: Main Harness B
STEP 1. Using scan tool MB991958, check data list item 61: ABS Monitor.
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 ON position.
3) Set scan tool MB991958 to the data reading mode.
^ Item 61: ABS Monitor.
^ When ABS-ECU connector B-118 is disconnected, ON is displayed.
^ When ABS-ECU connector B-118 is connected, OFF is displayed.
4) Turn the ignition switch to the LOCK (OFF) position.
Q: Is the ECU operating properly?
YES: It can be assumed that this malfunction is intermittent.
NO
NO
STEP 2. Check ABS-ECU connector B-118 and AWD-ECU connector C-138 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES: Go to Step 3.
NO: Repair or replace the damaged components.
STEP 3. Check the harness for short circuit to ground between ABS-ECU connector B-118 terminal 3 and AWD-ECU connector C-138 terminal 48.
Q: Is the harness wire in good condition?
YES: Replace the ABS-ECU.
NO: Repair or replace the harness wire.
STEP 4. Measure the voltage at AWD-ECU connector C-138 by backprobing.
1) Measure the voltage between AWD-ECU connector C-138 terminal 48 and ground by backprobing.
2) Turn the ignition switch to the ON position.
^ The voltage should measure battery positive voltage.
3) Turn the ignition switch to the LOCK (OFF) position.
Q: Is the measured voltage battery positive voltage?
YES: Go to Step 5.
NO: Go to Step 7.
STEP 5. Check AWD-ECU connector C-138 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connector and terminals in good condition?
YES: Go to Step 6.
NO: Repair or replace the damaged components.
STEP 6. Using scan tool MB991958, check data list item 61: ABS Monitor.
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 ON position.
3) Set scan tool MB991958 to the data reading mode.
^ Item 61: ABS Monitor.
^ When ABS-ECU connector B-118 is disconnected, ON is displayed.
^ When ABS-ECU connector B-118 is connected, "OFF" is displayed.
4) Turn the ignition switch to the LOCK (OFF) position.
Q: Is the ECU operating properly?
YES: It can be assumed that this malfunction is intermittent.
NO: Replace the AWD-ECU
STEP 7. Check ABS-ECU connector B-118 and AWD-ECU connector C-138 for loose, corroded or damaged terminals, or terminals pushed back in the connector.
Q: Are the connectors and terminals in good condition?
YES: Go to Step 8.
NO: Repair or replace the damaged components.
STEP 8. Check the harness for open circuit between ABS-ECU connector B-118 terminal 3 and AWD-ECU connector C-138 terminal 48.
Q: Is the harness wire in good condition?
YES: Replace the ABS-ECU.
NO: Repair or replace the harness wire.