| Last Modified: 11-20-2023 | 6.11:8.1.0 | Doc ID: RM1000000014VN7 |
| Model Year Start: 2018 | Model: Camry HV | Prod Date Range: [07/2017 - 09/2018] |
| Title: BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: C1427; Malfunction in Motor; 2018 MY Camry HV [07/2017 - 09/2018] | ||
|
DTC |
C1427 |
Malfunction in Motor |
DESCRIPTION
When the power switch is on (READY), the stop light switch assembly off and the vehicle speed is 20 km/h (12 mph) or more, the skid control ECU (brake booster with master cylinder assembly) performs a self-diagnosis of the ABS motor relay circuit during the initial check of the actuator.
|
DTC No. |
Detection Item |
INF Code |
DTC Detection Condition |
Trouble Area |
Note |
|---|---|---|---|---|---|
|
C1427 |
Malfunction in Motor |
1159 |
The pump motor built into the brake actuator assembly is not operating correctly. |
|
Electronically controlled brake system DTC |
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
-
After replacing the skid control ECU (brake booster with master cylinder assembly) or brake actuator assembly, perform linear solenoid valve offset learning, ABS holding solenoid valve learning, yaw rate and acceleration sensor zero point calibration and system information memorization after performing "Reset Memory".
Click here
![2018 MY Camry HV [07/2017 - 09/2018]; BRAKE CONTROL / DYNAMIC CONTROL SYSTEMS: ELECTRONICALLY CONTROLLED BRAKE SYSTEM: INITIALIZATION](/t3Portal/stylegraphics/info.gif)
- Inspect the fuses for circuits related to this system before performing the following procedure.
PROCEDURE
|
1. |
PERFORM ACTIVE TEST USING TECHSTREAM (ABS MOTOR RELAY) |
(a) Select the Active Test on the Techstream.
Chassis > ABS/VSC/TRAC > Active Test
|
Tester Display |
Measurement Item |
Control Range |
Diagnostic Note |
|---|---|---|---|
|
Motor Relay |
ABS motor relay |
Relay ON/OFF |
Operating sound of motor can be heard. |
Chassis > ABS/VSC/TRAC > Active Test
|
Tester Display |
|---|
|
Motor Relay |
(b) Check the operating sound of the ABS motor relay when operating it with the Techstream.
|
Result |
Proceed to |
|---|---|
|
The operating sound is heard. |
A |
|
The operating sound is not heard. |
B |
| B |
|
|
|
2. |
RECONFIRM DTC |
(a) Clear the DTCs.
Chassis > ABS/VSC/TRAC > Clear DTCs
(b) Turn the power switch off.
(c) Turn the power switch on (READY).
(d) Perform a road test.
(e) Check if the same DTC is output.
Chassis > ABS/VSC/TRAC > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC C1427 is not output. |
A |
|
DTC C1427 is output. |
B |
| A |
|
| B |
|
|
3. |
CHECK HARNESS AND CONNECTOR (BRAKE BOOSTER WITH MASTER CYLINDER ASSEMBLY - BRAKE ACTUATOR ASSEMBLY) |
(a) Turn the power switch off.
(b) Make sure that there is no looseness at the locking part and the connecting part of the connectors.
OK:
The connector is securely connected.
(c) Disconnect the A40 skid control ECU (brake booster with master cylinder assembly) connector.
(d) Disconnect the A44 brake actuator assembly connector.
(e) Check both the connector case and the terminals for deformation and corrosion.
OK:
No deformation or corrosion.
(f) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
A40-40 (+BM) - A44-10 (+BM) |
Always |
Below 1 Ω |
|
A40-40 (+BM) or A44-10 (+BM) - Body ground |
Always |
10 kΩ or higher |
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
4. |
CHECK HARNESS AND CONNECTOR (GND TERMINAL) |
|
(a) Measure the resistance according to the value(s) in the table below. Standard Resistance:
|
|
| NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (GND CIRCUIT) |
|
|
5. |
RECONFIRM DTC |
(a) Reconnect the A40 skid control ECU (brake booster with master cylinder assembly) connector.
(b) Reconnect the A44 brake actuator assembly connector.
(c) Clear the DTCs.
Chassis > ABS/VSC/TRAC > Clear DTCs
(d) Turn the power switch off.
(e) Turn the power switch on (READY).
(f) Perform a road test.
(g) Check if the same DTC is output.
Chassis > ABS/VSC/TRAC > Trouble Codes
|
Result |
Proceed to |
|---|---|
|
DTC C1427 is not output. |
A |
|
DTC C1427 is output. |
B |
| A |
|
| B |
|
|
|