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Home >> Toyota >> 2021 >> Mirai Limited >> Repair and Diagnosis >> Brakes >> Mechanical - Hydraulic >> Electronically Controlled Brake System - Diagnostic Codes (2 Of 4) >> Electronically Controlled Brake System >> DTC C1202-00: Master Reservoir Level Malfunction [11/2020 - ] >> Description

DTC C1202-00: Master Reservoir Level Malfunction [11/2020 - ]: Description

If the No. 1 skid control ECU (brake booster with master cylinder assembly) detects that the brake fluid level is low or there is an open in the brake fluid level warning switch signal circuit, DTC C1202-00 is stored.

DTC No. Detection Item DTC Detection Condition Trouble Area DTC Output from Priority Note
C1202-00 Master Reservoir Level Malfunction Either of the following is detected:
  • The brake fluid level warning switch signal circuit is open for a certain period of time.
  • The reservoir level is low for a certain period of time.
  • Open or short in brake fluid level warning switch (brake booster with master cylinder assembly)
  • Brake fluid leaks
  • Open or short in wire harness
  • Low brake fluid
  • No. 1 skid control ECU (brake booster with master cylinder assembly)
Brake Booster B Output ECU: No. 1 skid control ECU (brake booster with master cylinder assembly)
HINT: 
DTC C1202-00 is cleared when the conditions return to normal.
C1202-00 DTC DETECTION CONDITIONS

  Vehicle Condition
Pattern 1 Pattern 2
Diagnosis Condition - - -
Malfunction Status The brake fluid level warning switch signal circuit is open for a certain period of time -
The reservoir level is low for a certain period of time -
Detection Time - -
Number of Trips 1 trip 1 trip

HINT: 

DTC will be output when conditions for either of the patterns in the table above are met.