Code No. C200A:
Brake electric vacuum pump main relay coil (VP)
BRAKE VACUUM GENERATION SYSTEM CIRCUIT
OPERATION
The brake electric vacuum pump main relay is controlled by the EV-ECU.
DIAGNOSIS CODE SET CONDITIONS
After the electric motor switch is set to the ON position,
if the low voltage level of the excitation coil monitor for the brake electric vacuum pump main
relay continues before the brake electric vacuum pump main relay is set to on, the diagnosis
code No. C200A will be set.
While the brake electric vacuum pump main relay is set to on, if the high voltage level
of the excitation coil monitor for the brake electric vacuum pump main relay continues, the diagnosis
code No. C200A will be set.
PROBABLE CAUSES
Malfunction of the brake electric vacuum pump main relay
Malfunction of the brake electric vacuum pump relay box
Damaged wiring harness or connector(s)
Malfunction of the EV-ECU
DIAGNOSIS PROCEDURE
STEP 1. Measure the voltage at A-103X brake electric vacuum
pump main relay (brake electric vacuum pump relay box) connector.
(1)Remove the brake electric vacuum pump main relay, and measure the voltage at the
wiring harness side.
(2)Turn the electric motor switch to the "ON" position.
(3)Measure the voltage between the A-103X brake electric vacuum pump main relay (brake
electric vacuum pump relay box) connector terminal No. 3 and the body earth. OK: Battery voltage
Q.
Is the check result normal?
Go to Step 5.
Go to Step 2.
STEP 2. Connector check: A-103X brake electric vacuum pump main relay
(brake electric vacuum pump relay box) connector
Q.
Is the check result normal?
Go to Step 3.
Correct and replace the brake electric vacuum pump relay box. Replace the brake
electric vacuum pump.
Correct and replace the brake electric vacuum pump relay box. Replace the brake
electric vacuum pump.
STEP 4. Check the wiring harness between A-08X EV control relay (relay
box) connector terminal No. 1 and A-104 brake electric vacuum pump relay box connector terminal
No. 1.
Check the power supply line for open circuit.
Q.
Is the check result normal?
Go to Step 5.
Correct and replace the brake electric vacuum pump relay box. Replace the brake
electric vacuum pump.
STEP 5. Brake electric vacuum pump main relay check
Check the brake electric vacuum pump main relay. (Refer to GROUP 35A - On-vehicle
Service - Relay Check .)
Q.
Is the check result normal?
Go to Step 6.
Replace the brake electric vacuum pump main relay.
STEP 6. Connector check: A-103X brake electric vacuum pump main relay
(brake electric vacuum pump relay box) connector
Q.
Is the check result normal?
Go to Step 7.
Correct and replace the brake electric vacuum pump relay box. Replace the brake
electric vacuum pump.
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Go to Step 5.
Go to Step 2.
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