DTC 16

DTC 16: ABS-ECU Power Supply System (ABS-ECU Power Supply Voltage or Valve Relay Power Supply Voltage below or above the Specified Value)






CIRCUIT OPERATION
The ABS-ECU power is supplied to the ABS-ECU (terminal 20) from the ignition switch (IG2) through the multi-purpose fuse number 12 in the junction block.

ABS DTC SET CONDITIONS
Output is provided when ABS-ECU power supply voltage drops below or rises above the normal value. Output is not provided if power supply voltage returns to normal voltage.

TROUBLESHOOTING HINTS
The most likely causes for DTC is to set are:
- Malfunction of battery
- Damaged wiring harness and connector
- Malfunction of hydraulic unit and ABS-ECU

DIAGNOSIS

Required Special Tool:
- MB991502: Scan tool (MUT-II)





STEP 1. Using scan tool MB9911502, check the ABS DTC.

CAUTION: To prevent damage to scan tool MB991502, always turn the ignition switch to the "LOCK" (OFF) position before connecting or disconnecting scan tool MB991602.

1) Connect scan tool MB991502 to the data link connector.
2) Turn the ignition switch to the "ON" position.
3) Check the ABS DTC.
Q: Is ABS DTC 62 set?
YES: Carry out the troubleshooting regarding DTC 52.
NO: Go to Step 2.

STEP 2. Check the battery.
Q: Is the battery damaged?
YES: Charge or replace the battery and then go to Step 5.
NO: Go to Step 3.

STEP 3. Check the charging system.
Q: Is the charging system damaged?
YES: Repair the Charging System and then go to Step 5.
NO: Go to Step 4.











STEP 4. Check the harness wires between junction block connector C-211 and ABS-ECU connector B-118.

NOTE: After inspecting intermediate connector C-2 10 and C12Z inspect the wire. If intermediate connector C-210 and C-122 is damaged, repair or replace it. If the connector has been repaired or replaced, go to Step 5.

Q: Is the harness wire between junction block connector C-211 and ABS-ECU connector B-118 damaged?
YES: Repair it and go to Step 5.
NO: Repair the hydraulic unit (integrated with ABS-ECU) and then go to Step 5.

STEP 5. Check the DTC.
Q: Does DTC 16 reset?
YES: Start over at Step 1.
NO: This diagnosis is complete.