Last Modified: 01-30-2024 |
6.11:8.1.0 |
Doc ID: RM100000001HHAD |
Model Year Start: 2019 |
Model: RAV4 HV |
Prod Date Range: [02/2019 - 10/2022] |
Title: DOOR LOCK: WIRELESS DOOR LOCK CONTROL SYSTEM (for HV Model, with Smart Key System): B1242; Wireless Door Lock Tuner Circuit Malfunction; 2019 - 2022 MY RAV4 HV [02/2019 - 10/2022] |
DTC
|
B1242
|
Wireless Door Lock Tuner Circuit Malfunction
|
DESCRIPTION
The door control receiver receives a signal from the electrical key transmitter sub-assembly and sends signals to the main body ECU (multiplex network body ECU) through the certification ECU (smart key ECU assembly) via CAN communication system. The certification ECU (smart key ECU assembly) sends door lock/unlock commands to the main body ECU (multiplex network body ECU).
DTC No.
|
Detection Item
|
DTC Detection Condition
|
Trouble Area
|
B1242
|
Wireless Door Lock Tuner Circuit Malfunction
|
One of the following conditions is met:
-
Short in RDAM between the certification ECU (smart key ECU assembly) and door control receiver.
-
Short in RCO between the certification ECU (smart key ECU assembly) and door control receiver.
|
-
Door control receiver
-
Certification ECU (smart key ECU assembly)
-
Harness or connector
|
WIRING DIAGRAM
CAUTION / NOTICE / HINT
PROCEDURE
1.
|
CHECK CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)
|
(a) Disconnect the M8*1 or M11*2 door control receiver connector.
-
*1: for 12 Pin Type
-
*2: for 5 Pin Type
(b) Measure the voltage and resistance and check for pulses according to the value(s) in the table below.
*a
|
Component with harness connected
(Certification ECU (Smart Key ECU Assembly))
|
-
|
-
|
Standard Voltage:
Tester Connection
|
Condition
|
Specified Condition
|
M7-19 (RDAM) - G54-18 (E)
|
Always
|
11 to 14 V
|
M7-18 (RCO) - G54-18 (E)
|
Always
|
Pulse generation at regular intervals
(Below 1 V ←→ 4.5 to 5.5 V)
|
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
G54-18 (E) - Body ground
|
Always
|
Below 1 Ω
|
NG
|
|
|
2.
|
CHECK HARNESS AND CONNECTOR (DOOR CONTROL RECEIVER - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) AND BODY GROUND)
|
(a) Disconnect the M7 certification ECU (smart key ECU assembly) connector.
(b) Disconnect the M8*1 or M11*2 door control receiver connector.
-
*1: for 12 Pin Type
-
*2: for 5 Pin Type
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
for 12 Pin Type
Tester Connection
|
Condition
|
Specified Condition
|
M7-19 (RDAM) - M8-2 (DATA)
|
Always
|
Below 1 Ω
|
M7-18 (RCO) - M8-8 (+5)
|
Always
|
Below 1 Ω
|
M8-12 (GND) - Body ground
|
Always
|
Below 1 Ω
|
M8-2 (DATA) or M7-19 (RDAM) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
M8-8 (+5) or M7-18 (RCO) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
for 5 Pin Type
Tester Connection
|
Condition
|
Specified Condition
|
M7-19 (RDAM) - M11-5 (DATA)
|
Always
|
Below 1 Ω
|
M7-18 (RCO) - M11-4 (+5)
|
Always
|
Below 1 Ω
|
M11-1 (GND) - Body ground
|
Always
|
Below 1 Ω
|
M11-5 (DATA) or M7-19 (RDAM) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
M11-4 (+5) or M7-18 (RCO) - Other terminals and body ground
|
Always
|
10 kΩ or higher
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR
|
|