DESCRIPTION
WIRING DIAGRAM
INSPECTION PROCEDURE
INSPECT FUSE (BK/UP LP FUSE)
CHECK VEHICLE TYPE
INSPECT PARK/NEUTRAL POSITION SWITCH
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BATTERY)
CHECK VEHICLE TYPE
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BACK-UP LIGHT AND BODY GROUND)
CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - REAR LIGHT AND BODY GROUND)
INSPECT BACK-UP LIGHT SWITCH
CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH - BATTERY)
CHECK VEHICLE TYPE
CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH - BACK-UP LIGHT AND BODY GROUND)
CHECK HARNESS OR CONNECTOR (BACK-UP LIGHT SWITCH - REAR LIGHT AND BODY GROUND)
LIGHTING SYSTEM - Back-up Light Circuit
DESCRIPTION
The park/neutral position switch turns on when the shift lever is moved to R, causing the back-up lights to illuminate.
WIRING DIAGRAM
INSPECTION PROCEDURE
| 1.INSPECT FUSE (BK/UP LP FUSE) |
Remove the BK/UP LP fuse from the main body ECU.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| BK/UP LP fuse | Always | Below 1 Ω |
Check the vehicle type.
Result| Result | Proceed to |
| for Automatic Transmission | A |
| for Manual Transmission | B |
| 3.INSPECT PARK/NEUTRAL POSITION SWITCH |
Remove the park/neutral position switch.
for A750F Automatic Transmission:
for AB60F Automatic Transmission:
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| 2 (RB) - 1 (RL) | Shift lever in R | Below 1 Ω |
| 2 (RB) - 1 (RL) | Shift lever not in R | 10 kΩ or higher |
Result| Result | Proceed to |
| OK | A |
| NG (for A750F Automatic Transmission) | B |
| NG (for AB60F Automatic Transmission) | C |
| | REPLACE PARK/NEUTRAL POSITION SWITCH ()
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| | REPLACE PARK/NEUTRAL POSITION SWITCH ()
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| 4.CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BATTERY) |
Disconnect the C24 park/neutral position switch connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
| C24-2 (RB) - Body ground | Ignition switch ON | 11 to 14 V |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Check the vehicle type.
Result| Result | Proceed to |
| for Double Swing Out Type | A |
| except Double Swing Out Type | B |
| 6.CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - BACK-UP LIGHT AND BODY GROUND) |
Disconnect the C24 park/neutral position switch connector.
for LH:
Disconnect the O8 light connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C24-1 (RL) - O8-2 | Always | Below 1 Ω |
| O8-1 - Body ground |
| O8-2 - Body ground | Always | 10 kΩ or higher |
for RH:
Disconnect the O7 light connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C24-1 (RL) - O7-2 | Always | Below 1 Ω |
| O7-1 - Body ground |
| O7-2 - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE ()
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| 7.CHECK HARNESS AND CONNECTOR (PARK/NEUTRAL POSITION SWITCH - REAR LIGHT AND BODY GROUND) |
Disconnect the C24 park/neutral position switch connector.
for LH:
Disconnect the S11 light connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C24-1 (RL) - S11-2 (B) | Always | Below 1 Ω |
| S11-1 (E) - Body ground |
| S11-2 (B) - Body ground | Always | 10 kΩ or higher |
for RH:
Disconnect the S12 light connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C24-1 (RL) - S12-2 (B) | Always | Below 1 Ω |
| S12-1 (E) - Body ground |
| S12-2 (B) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE ()
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| 8.INSPECT BACK-UP LIGHT SWITCH |
Remove the back-up light switch ().
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Switch Condition | Specified Condition |
| 1 - 2 | On (pushed) | Below 1 Ω |
| 1 - 2 | Off (released) | 10 kΩ or higher |
| | REPLACE BACK-UP LIGHT SWITCH ASSEMBLY ()
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| 9.CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH - BATTERY) |
Disconnect the C39 back-up light switch connector.
Measure the voltage according to the value(s) in the table below.
- Standard Voltage:
| Tester Connection | Switch Condition | Specified Condition |
| C39-2 - Body ground | Ignition switch ON | 11 to 14 V |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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Check the vehicle type.
Result| Result | Proceed to |
| for Double Swing Out Type | A |
| except Double Swing Out Type | B |
| 11.CHECK HARNESS AND CONNECTOR (BACK-UP LIGHT SWITCH - BACK-UP LIGHT AND BODY GROUND) |
Disconnect the C39 back-up light switch connector.
for LH:
Disconnect the O8 light connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C39-1 - O8-2 | Always | Below 1 Ω |
| O8-1 - Body ground |
| O8-2 - Body ground | Always | 10 kΩ or higher |
for RH:
Disconnect the O7 light connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C39-1 - O7-2 | Always | Below 1 Ω |
| O7-1 - Body ground |
| O7-2 - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE ()
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| 12.CHECK HARNESS OR CONNECTOR (BACK-UP LIGHT SWITCH - REAR LIGHT AND BODY GROUND) |
Disconnect the C39 back-up light switch connector.
for LH:
Disconnect the S11 light connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C39-1 - S11-2 (B) | Always | Below 1 Ω |
| S11-1 (E) - Body ground |
| S11-2 (B) - Body ground | Always | 10 kΩ or higher |
for RH:
Disconnect the S12 light connector.
Measure the resistance according to the value(s) in the table below.
- Standard Resistance:
| Tester Connection | Condition | Specified Condition |
| C39-1 - S12-2 (B) | Always | Below 1 Ω |
| S12-1 (E) - Body ground |
| 12-2 (B) - Body ground | Always | 10 kΩ or higher |
| | REPAIR OR REPLACE HARNESS OR CONNECTOR |
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| OK | |
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| PROCEED TO NEXT INSPECTION PROCEDURE SHOWN IN PROBLEM SYMPTOMS TABLE ()
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