Code No.C1863: G and yaw rate sensor power supply voltage too low




DIAGNOSIS CODE SET CONDITIONS


The G and yaw rate sensor monitors the battery voltage. If this voltage drops to approximately 8 V or less, the system will interpret as a failure and set the diagnosis code.

PROBABLE CAUSES



DIAGNOSIS PROCEDURE

STEP 1. Voltage measurement at the battery terminal
(1)Ignition switch: ON
(2)Engine: Started
(3)Measure the voltage between the battery terminals.
OK: more than 9 V

Q. Is the check result normal?
Go to Step 2.
Diagnose the charging system (Refer to GROUP 16, Charging System - On-vehicle Service ).

STEP 2. Connector check: C-26 G and yaw rate sensor connector and B-210 junction block connector



Q. Are the check result normal?

Go to Step 3.

Repair the defective connector.

STEP 3. Resistance measurement at the C-26 G and yaw rate sensor connector and B-210 junction block connector.



(1)Disconnect the C-26 G and yaw rate sensor connector, and connect B-210 junction block connector.

(2)Resistance between C-26 G and yaw rate sensor connector terminal No.1 and B-210 junction block connector terminal No.11
OK: Less than 5 Ω

Q. Is the check result normal?

Go to Step 4.

Repair the wiring harness.

STEP 4. Resistance measurement at the C-26 G and yaw rate sensor connector.

(1)Disconnect the C-26 G and yaw rate sensor connector, and connect special tool test Harness to the wiring harness-side connector.
note Connect the special tool Test Harness to the ABS/Active stability control system-ECU.

(2)Resistance between C-26 G and yaw rate sensor connector terminal No.4 and body earth
OK: 5 Ω or less

Q. Is the check result normal?

Go to Step 5.

Repair the wiring harness.

STEP 5. Check whether the diagnosis code is reset.

caution Before connecting or disconnecting the M.U.T.-III, turn the ignition switch to the "LOCK" (OFF) position.
Check again if the diagnosis code is set.
(1)Turn the ignition switch to the "ON" position.
(2)Erase the diagnosis code.
(3)Turn the ignition switch to the "LOCK" (OFF) position.
(4)Turn the ignition switch to the "ON" position.
(5)Check if the diagnosis code is set.
(6)Turn the ignition switch to the "LOCK" (OFF) position.
(7)Disconnect M.U.T.-III.

Q. Is code No.C1863 set?

Replace the G and yaw rate sensor.

The trouble can be an intermittent malfunction (Refer to GROUP 00 - How to use Troubleshooting/inspection Service Points - How to Cope with Intermittent Malfunction ).