Toyota CH-R Service Manual: Power Retractable Mirrors do not Operate with Power Retract Mirror Switch
DESCRIPTION
The outer mirror switch assembly sends a mirror retract/return signal to the main body ECU (multiplex network body ECU) when the retractable outer mirror switch on the outer mirror switch assembly is operated. The main body ECU (multiplex network body ECU) retracts or returns the outer rear view mirror assemblies based on the signal.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
- Inspect the fuses for circuits related to this system before performing the following procedure.
- If the main body ECU (multiplex network body ECU) is replaced, refer
to Registration.*1
Click here
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- *1: w/ Smart Key System
PROCEDURE
|
1. |
READ VALUE USING TECHSTREAM |
(a) Connect the Techstream to the DLC3.
(b) Turn the ignition switch to ON
(c) Turn the Techstream on.
(d) Enter the following menus: Body Electrical / Main Body / Data List.
(e) Read the Data List according to the display on the Techstream.
Body Electrical > Main Body > Data List|
Tester Display |
Measurement Item |
Range |
Normal Condition |
Diagnostic Note |
|---|---|---|---|---|
|
Outer Mirror Fold SW |
Retractable outer mirror switch signal |
OFF or ON |
OFF: Retractable outer mirror switch off ON: Retractable outer mirror switch on |
- |
|
Tester Display |
|---|
|
Outer Mirror Fold SW |
OK:
On the Techstream screen, ON or OFF is displayed accordingly.
| NG | .gif) |
GO TO STEP 11 |
|
.gif)
|
2. |
CHECK MALFUNCTIONING PARTS |
(a) Check the malfunctioning parts.
|
Result |
Proceed to |
|---|---|
|
Both outer rear view mirror assemblies are malfunctioning |
A |
|
Outer rear view mirror assembly LH is malfunctioning |
B |
|
Outer rear view mirror assembly RH is malfunctioning |
C |
| B | |
GO TO STEP 7 |
| C | |
GO TO STEP 9 |
|
|
3. |
INSPECT MIRROR(+) / MIRROR(-) RELAY |
(a) Remove the MIRROR(+) relay from the No. 4 relay block assembly.
(b) Inspect the MIRROR(-) relay.
Click here
(c) Remove the MIRROR(-) relay from the No. 4 relay block assembly.
(d) Inspect the MIRROR(+) relay.
Click here
|
Result |
Proceed to |
|---|---|
|
OK |
A |
|
NG (MIRROR(+) Relay) |
B |
|
NG (MIRROR(-) Relay) |
C |
| B | |
REPLACE MIRROR(+) RELAY |
| C | |
REPLACE MIRROR(-) RELAY |
|
|
4. |
CHECK HARNESS AND CONNECTOR (MIRROR(+) / MIRROR(-) RELAY POWER SOURCE) |
|
(a) Remove the MIRROR(+) relay from the No. 4 relay block assembly. |
|
(b) Remove the MIRROR(-) relay from the No. 4 relay block assembly.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
No. 4 relay block assembly MIRROR(+) relay terminal 1 - Body ground |
Always |
11 to 14 V |
|
No. 4 relay block assembly MIRROR(-) relay terminal 1 - Body ground |
Always |
11 to 14 V |
|
No. 4 relay block assembly MIRROR(+) relay terminal 5 - Body ground |
Always |
11 to 14 V |
|
No. 4 relay block assembly MIRROR(-) relay terminal 5 - Body ground |
Always |
11 to 14 V |
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
No. 4 relay block assembly MIRROR(+) relay terminal 4 - Body ground |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(-) relay terminal 4 - Body ground |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(+) relay terminal 4 - No. 4 relay block assembly MIRROR(-) relay terminal 4 |
Always |
Below 1 Ω |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
5. |
CHECK HARNESS AND CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - MIRROR(+) / MIRROR(-) RELAY) |
|
(a) Remove the MIRROR(+) relay from the No. 4 relay block assembly. |
|
(b) Remove the MIRROR(-) relay from the No. 4 relay block assembly.
(c) Disconnect the F16 main body ECU (multiplex network body ECU) connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
No. 4 relay block assembly MIRROR(-) relay terminal 2 - F16-19 (RETR) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(+) relay terminal 2 - F16-20 (RTRR) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(-) relay terminal 2 or F16-19 (RETR) - Body Ground |
Always |
10 kΩ or higher |
|
No. 4 relay block assembly MIRROR(+) relay terminal 2 or F16-20 (RTRR) - Body Ground |
Always |
10 kΩ or higher |
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
|
6. |
CHECK HARNESS AND CONNECTOR (OUTER REAR VIEW MIRROR ASSEMBLY LH/RH - MIRROR(+) / MIRROR(-) RELAY) |
|
(a) Remove the MIRROR(+) relay from the No. 4 relay block assembly. |
|
(b) Remove the MIRROR(-) relay from the No. 4 relay block assembly.
(c) Disconnect the J7 outer rear view mirror assembly LH connector.
(d) Disconnect the I8 outer rear view mirror assembly RH connector.
(e) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
No. 4 relay block assembly MIRROR(-) relay terminal 3 - I8-5 (MR) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(-) relay terminal 3 - J7-5 (MR) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(+) relay terminal 3 - I8-6 (MF) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(+) relay terminal 3 - J7-6 (MF) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(-) relay terminal 3 or I8-5 (MR) - Body Ground |
Always |
10 kΩ or higher |
|
No. 4 relay block assembly MIRROR(-) relay terminal 3 or J7-5 (MR) - Body Ground |
Always |
10 kΩ or higher |
|
No. 4 relay block assembly MIRROR(+) relay terminal 3 or I8-6 (MF) - Body Ground |
Always |
10 kΩ or higher |
|
No. 4 relay block assembly MIRROR(+) relay terminal 3 or J7-6 (MF) - Body Ground |
Always |
10 kΩ or higher |
| OK | |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
7. |
INSPECT OUTER REAR VIEW MIRROR ASSEMBLY LH |
(a) Remove the outer rear view mirror assembly LH.
Click here
(b) Inspect the outer rear view mirror assembly LH.
Click here
| NG | |
REPLACE OUTER REAR VIEW MIRROR ASSEMBLY LH |
|
|
8. |
CHECK HARNESS AND CONNECTOR (MIRROR(+) / MIRROR(-) RELAY - OUTER REAR VIEW MIRROR ASSEMBLY LH) |
|
(a) Remove the MIRROR(+) relay from the No. 4 relay block assembly. |
|
(b) Remove the MIRROR(-) relay from the No. 4 relay block assembly.
(c) Disconnect the J7 outer rear view mirror assembly LH connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
No. 4 relay block assembly MIRROR(-) relay terminal 3 - J7-5 (MR) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(+) relay terminal 3 - J7-6 (MF) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(-) relay terminal 3 or J7-5 (MR) - Body Ground |
Always |
10 kΩ or higher |
|
No. 4 relay block assembly MIRROR(+) relay terminal 3 or J7-6 (MF) - Body Ground |
Always |
10 kΩ or higher |
| OK | |
USE SIMULATION METHOD TO CHECK
|
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
9. |
INSPECT OUTER REAR VIEW MIRROR ASSEMBLY RH |
(a) Remove the outer rear view mirror assembly RH.
Click here
(b) Inspect the outer rear view mirror assembly RH.
Click here
| NG | |
REPLACE OUTER REAR VIEW MIRROR ASSEMBLY RH |
|
|
10. |
CHECK HARNESS AND CONNECTOR (MIRROR(+) / MIRROR(-) RELAY - OUTER REAR VIEW MIRROR ASSEMBLY RH) |
|
(a) Remove the MIRROR(+) relay from the No. 4 relay block assembly. |
|
(b) Remove the MIRROR(-) relay from the No. 4 relay block assembly.
(c) Disconnect the I8 outer rear view mirror assembly RH connector.
(d) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
No. 4 relay block assembly MIRROR(-) relay terminal 3 - I8-5 (MR) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(+) relay terminal 3 - I8-6 (MF) |
Always |
Below 1 Ω |
|
No. 4 relay block assembly MIRROR(-) relay terminal 3 or I8-5 (MR) - Body Ground |
Always |
10 kΩ or higher |
|
No. 4 relay block assembly MIRROR(+) relay terminal 3 or I8-6 (MF) - Body Ground |
Always |
10 kΩ or higher |
| OK | |
USE SIMULATION METHOD TO CHECK
|
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
|
11. |
INSPECT OUTER MIRROR SWITCH ASSEMBLY |
(a) Remove the outer mirror switch assembly.
Click here
(b) Inspect the outer mirror switch assembly.
Click here
| NG | |
REPLACE OUTER MIRROR SWITCH ASSEMBLY |
|
|
12. |
CHECK HARNESS AND CONNECTOR (OUTER MIRROR SWITCH ASSEMBLY - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)) |
(a) Disconnect the J10 outer mirror switch assembly.
(b) Disconnect the F16 main body ECU (multiplex network body ECU).
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
|
Tester Connection |
Condition |
Specified Condition |
|---|---|---|
|
J10-2 (MR) - F16-14 (RET) |
Always |
Below 1 Ω |
|
J10-4 (MAT) - F16-15 (RTR) |
Always |
Below 1 Ω |
|
J10-2 (MR) or F16-14 (RET) - Body ground |
Always |
10 kΩ or higher |
|
J10-4 (MAT) or F16-15 (RTR) - Body ground |
Always |
10 kΩ or higher |
|
J10-5 (E) - Body ground |
Always |
Below 1 Ω |
| OK | |
REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)
|
| NG | |
REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Toyota C-HR (AX20) 2023-2025 Owner's Manual
Toyota CH-R Owners Manual
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