Mirror: Overview Lexus IS II

SYSTEM DESCRIPTION

The memory system can store the driver seat, front passenger seat, outside rear view mirror positions and tilt & telescopic position. Up to 3 memory positions can be stored in the system memory and recalled. Three positions can be saved for the driver memory switch or front passenger memory switch.

1. Each seat ECU stores the seat position (seat slide, front vertical, rear vertical and reclining) in its memory. Each seat ECU is built into the power seat switch.
2. Each mirror ECU stores the outside rear view mirror position in its memory.
3. The tile & telescopic ECU stores the tilt & telescopic position in its memory.
4. The seat ECU (Driver) outputs a reproduction signal to each ECU.

DESCRIPTION

1. A switch signal of the outer mirror switch is transmitted to the selected outer mirror control ECU by way of the main body ECU RH. Then, the outer mirror control ECU activates the mirror motor to move the mirror UP, DOWN, RIGHT and LEFT in response to the input.
2. Mirror control switch and memorized mirror position signals (from the position control ECU & switch (seat ECU)) are sent to the mirror control ECU. The mirror control ECU moves the selected mirror UP, DOWN, LEFT and RIGHT in response to the input.

HINT

The power mirror control system is a part of the multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See MULTIPLEX COMMUNICATION SYSTEM ).

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1. CHECK DTCs Select the DTC check on the intelligent tester to check for communication errors. Result RESULT TABLE Not output DTC codes A Output DTC codes B B: GO TO «MULTIPLEX COMMUNICATION SYSTEM»(ref-235578-S20958542052006062400000) A: Go to next step.
2. INSPECT OUTER MIRROR SWITCH Remove the outer mirror switch. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S00235086662006062400000) when the switch is operated. Resistance TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Switch Position Specified Condition 2 - 3 OFF 10 k ohms or higher UP 225 to 275 ohms DOWN 437 to 503 ohms LEFT 744 to 856 ohms RIGHT 437 to 503 ohms 1 - 2 L 90 to 110 ohms R 10 ohms or less NG: REPLACE OUTER MIRROR SWITCH OK: Go to next step.
3. CHECK WIRE HARNESS (OUTER MIRROR SWITCH - MAIN BODY ECU RH) Disconnect the M8 and J74 connectors. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S17761111772006062400000) . Resistance TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition M8-3 (M+) - J74-11 (MIRB) Always Below 1 ohms M8-1 (MSW) - J74-12 (MIRS) Always Below 1 ohms M8-2 (E) - J74-3 (MIRE) Always Below 1 ohms M8-3 (M+) - Body ground Always 10 k ohms or higher M8-1 (MSW) - Body ground Always 10 k ohms or higher M8-2 (E) - Body ground Always 10 k ohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE OUTER MIRROR CONTROL ECU
4. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Select the ACTIVE TEST, use the intelligent tester to issue a control command, and then check the outer rear view mirrors. MIRROR-L/MIRROR-R ACTIVE TEST DISPLAY TABLE Item Test Details MIRR UP/DOWN Mirror vertical operation: UP/DOWN MIRR RIGHT/LEFT Mirror horizontal operation: RIGHT/LEFT OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE NG: Go to next step.
5. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY Outer rear view mirror LH: Disconnect the h1 connector. Apply battery voltage and check operation of the mirror face. Standard MEASUREMENT CONDITION SPECIFIED CONDITION TABLE Measurement Condition Mirror Operation Battery positive (+) --> h1-1 (MV) Battery negative (-)--> h1-10 (M+) Turns upward (A) Battery positive (+) --> h1-10 (M+) Battery negative (-)--> h1-1 (MV) Turns downward (B) Battery positive (+)--> h1-9 (MH) Battery negative (-)--> h1-10 (M+) Turns left (C) Battery positive (+)--> h1-10 (M+) Battery negative (-)--> h1-9 (MH) Turns right (D) Outer rear view mirror RH: Disconnect the g1 connector. Apply battery voltage and check operation of the mirror face. Standard MEASUREMENT CONDITION SPECIFIED CONDITION TABLE Measurement Condition Mirror Operation Battery positive (+) --> g1-1 (MV) Battery negative (-)--> g1-10 (M+) Turns upward (A) Battery positive (+)--> g1-10 (M+) Battery negative (-)--> g1-1 (MV) Turns downward (B) Battery positive (+)--> g1-9 (MH) Battery negative (-)--> g1-10 (M+) Turns left (C) Battery positive (+)--> g1-10 (M+) Battery negative (-)--> g1-9 (MH) Turns right (D) NG: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY OK: REPLACE OUTER MIRROR CONTROL ECU

with Navigation System

When the mirror defogger switch, which is built into the multi-media module display assembly, is operated, the operation signals are transmitted to the A/C amplifier assembly through AVC-LAN and BEAN. When the A/C amplifier assembly receives the signals, it turns on the MIR HTR relay to operate the mirror defogger.

without Navigation System

When the mirror defogger switch, which is built into the integration control & panel, is operated, the operation signals are transmitted to the A/C amplifier assembly through AVC-LAN and BEAN. When the A/C amplifier assembly receives the signals, it turns on the MIR HTR relay to operate the mirror defogger.

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1. CHECK DTCs Select the DTC check on the intelligent tester to check for communication errors. Result RESULT TABLE Not output DTC codes A Output DTC codes (Multiplex communication) B Output DTC codes (CAN communication) C B: GO TO «MULTIPLEX COMMUNICATION SYSTEM»(ref-235578-S20958542052006062400000) C: GO TO «CAN COMMUNICATION SYSTEM»(ref-235565-S22980917632006062400000) A: Go to next step.
2. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Select the ACTIVE TEST, use the intelligent tester to issue a control command, and then check the mirror defogger operation. AIR CONDITIONER ACTIVE TEST DISPLAY TABLE Item Test Details MIRR HEATER Mirror heater operation: OFF/ON Result RESULT TABLE OK (with Navigation System) A OK (without Navigation System) B NG C B: Go to step 5 C: Go to step 9 A: Go to next step.
3. REPLACE MULTI-MEDIA MODULE DISPLAY Replace the multi-media module display.
4. CONFIRM MIRROR DEFOGGER OPERATION Turn the engine switch on (IG), press the defogger switch, and check that mirror heater operates. NG: REPLACE A/C AMPLIFIER ASSEMBLY OK: END
5. REPLACE INTEGRATION CONTROL & PANEL Replace the integration control & panel.
6. CONFIRM MIRROR DEFOGGER OPERATION Turn the engine switch on (IG), press the defogger switch, and check that mirror heater operates. OK: END NG: Go to next step.
7. REPLACE RADIO RECEIVER ASSEMBLY Replace the radio receiver assembly.
8. CONFIRM MIRROR DEFOGGER OPERATION Turn the engine switch on (IG), press the defogger switch, and check that mirror heater operates. NG: REPLACE A/C AMPLIFIER ASSEMBLY OK: END
9. PERFORM ACTIVE TEST BY INTELLIGENT TESTER Select the ACTIVE TEST, use the intelligent tester to issue a control command, and then check the MIR HTR relay operation. HINT: Check that operation sound of the MIR HTR relay can be heard. OK: Go to step 13 NG: Go to next step.
10. INSPECT MIR HTR RELAY See «MIRROR HEATER RELAY»(ref-235597-S23781910042006062400000) NG: REPLACE MIR HTR RELAY OK: Go to next step.
11. CHECK WIRE HARNESS (MIR HTR RELAY) Disconnect the MIR HTR relay. Measure the voltage according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S34174156592006062400000) . Voltage TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition 1 - Body ground Engine switch on (IG) 10 to 14 V NG: REPAIR OR REPLACE LH-IG FUSE OR HARNESS AND CONNECTOR OK: Go to next step.
12. CHECK WIRE HARNESS (MIR HTR RELAY - A/C AMPLIFIER ASSEMBLY) Disconnect the MIR HTR relay and A/C amplifier assembly connector. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S13442288992006062400000) . Resistance TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition 2 - J58-2 (MHTR) Always Below 1 ohms 2 - Body ground Always 10 k ohms or higher NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE A/C AMPLIFIER ASSEMBLY
13. INSPECT MIR HTR RELAY See «MIRROR HEATER RELAY»(ref-235597-S23781910042006062400000) NG: REPLACE MIR HTR RELAY OK: Go to next step.
14. CHECK WIRE HARNESS (MIR HTR RELAY - BATTERY POSITIVE AND BODY GROUND) Disconnect the MIR HTR relay. Measure the voltage according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S42272322432006062400000) . Voltage TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition 5 - Body ground Engine switch on (IG) 10 to 14 V NG: REPAIR OR REPLACE MIR HTR FUSE OR HARNESS OK: Go to next step.
15. CHECK WIRE HARNESS (MIR HTR RELAY - OUTER MIRROR ASSEMBLY) Disconnect the MIR HTR relay and outer rear view mirror assembly connectors. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S09284884512006062400000) . (*): Outer rear view mirror assembly RH Resistance: Outer rear view mirror assembly LH TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition 3 - M15-3 (HTR+) Always Below 1 ohms 3 - Body ground Always 10 k ohms or higher M15-9 (HTR-) - Body ground Always Below 1 ohms Outer rear view mirror assembly RH TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition 3 - L14-3 (HTR+) Always Below 1 ohms 3 - Body ground Always 10 k ohms or higher L14-9 (HTR-) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY

When the seat memory switch M1, M2 or M3 is pressed, the position control ECU & switch (Seat ECU) transmits a signal of the memorized mirror position to the outer mirror control ECU by way of the power window regulator master switch. Then, the outer mirror control ECU drives the mirror motor.

HINT

The power mirror control system is a part of the multiplex communication system. This system features shared communication wiring that reduces the wiring complexity of the communication lines. The first step in any repair is to confirm the proper operation of the communication system. Proceed with troubleshooting after the communication has been verified (See the MULTIPLEX COMMUNICATION SYSTEM ).

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1. READ VALUE OF INTELLIGENT TESTER Check the DATA LIST for proper function of the seat memory switch. D-SEAT DATA LIST DISPLAY TABLE Item Switch Position Specified condition D-MIRR MEM M1 Driver side mirror position memorized in seat memory switch M 1/NOT MEM or MEM MEM: Memorized NOT MEM: Not memorized D-MIRR MEM M2 Driver side mirror position memorized in seat memory switch M 2/NOT MEM or MEM D-MIRR MEM M3 Driver side mirror position memorized in seat memory switch M 3/NOT MEM or MEM P-MIRR MEM M1 Passenger side mirror position memorized in seat memory switch M 1/NOT MEM or MEN P-MIRR MEM M2 Passenger side mirror position memorized in seat memory switch M 2/NOT MEM or MEN P-MIRR MEM M3 Passenger side mirror position memorized in seat memory switch M 3/NOT MEM or MEN OK: REPLACE OUTER MIRROR CONTROL ECU NG: Go to next step.
2. CHECK SEAT MEMORY SWITCH Remove the seat memory switch. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S29770361942006062400000) when the switch is operated. Resistance TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Switch Condition Specified Condition 1-5 "SET" switch ON Below 1 ohms 1-5 "SET" switch OFF 10 k ohms or higher 2-5 "1" switch ON Below 1 ohms 2-5 "SET" switch OFF 10 k ohms or higher 3-5 "2" switch ON Below 1 ohms 3-5 "SET" switch OFF 10 k ohms or higher 4-5 "3" switch ON Below 1 ohms 4-5 "SET" switch OFF 10 k ohms or higher NG: REPLACE SEAT MEMORY SWITCH OK: Go to next step.
3. CHECK WIRE HARNESS (SEAT MEMORY SWITCH - OUTER MIRROR CONTROL ECU) Disconnect the M6 (L7) and M10 (L10) switch connectors. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S04708510842006062400000) . ( ): RH side Resistance: LH side TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition M6-1 (MRY) - M10-25 (MM) Always Below 1 ohms M6-2 (M1) - M10-22 (M1) Always Below 1 ohms M6-3 (M2) - M10-23 (M2) Always Below 1 ohms M6-4 (M3) - M10-24 (M3) Always Below 1 ohms M6-5 (E) - Body ground Always Below 1 ohms RH side TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition L7-1 (MRY) - L10-25 (MM) Always Below 1 ohms L7-2 (M1) - L10-22 (M1) Always Below 1 ohms L7-3 (M2) - L10-23 (M2) Always Below 1 ohms L7-4 (M3) - L10-24 (M3) Always Below 1 ohms L7-5 (E) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
4. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY Outer rear view mirror LH: Disconnect the h1 connector. Apply battery voltage and check operation of the mirror face. Standard MEASUREMENT CONDITION SPECIFIED CONDITION TABLE Measurement Condition Mirror Operation Battery positive (+) --> h1-1 (MV) Battery negative (-) --> h1-10 (M+) Turns upward (A) Battery positive (+) --> h1-10 (M+) Battery negative (-) --> h1-1 (MV) Turns downward (B) Battery positive (+) --> h1-9 (MH) Battery negative (-) --> h1-10 (M+) Turns left (C) Battery positive (+) --> h1-10 (M+) Battery negative (-) --> h1-9 (MH) Turns right (D) Outer rear view mirror RH: Disconnect the g1 connector. Apply battery voltage and check operation of the mirror face. Standard MEASUREMENT CONDITION SPECIFIED CONDITION TABLE Measurement Condition Mirror Operation Battery positive (+) --> g1-1 (MV) Battery negative (-) --> g1-10 (M+) Turns upward (A) Battery positive (+) --> g1-10 (M+) Battery negative (-) --> g1-1 (MV) Turns downward (B) Battery positive (+) --> g1-9 (MH) Battery negative (-) --> g1-10 (M+) Turns left (C) Battery positive (+) --> g1-10 (M+) Battery negative (-) --> g1-9 (MH) Turns right (D) NG: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY OK: END

A/T models

After the ECM receives a reverse signal from the park/neutral position switch, the ECM sends a reverse signal to the outer mirror control ECU via the CAN and BEAN communication systems. The outer mirror control ECU activates the mirror motor in response to the reverse signal.

M/T models

After the main body ECU RH (cowl side J/B RH) receives a reverse signal from the back up light switch, the ECU sends a reverse signal to the outer mirror control ECU via the BEAN communication system. The outer mirror control ECU activates the mirror motor in response to the reverse signal.

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1. CHECK DTCs Select the DTC check on the intelligent tester to check for communication errors. Result RESULT TABLE Not output DTC codes A Output DTC codes (Multiplex communication) B Output DTC codes (CAN communication) C B: GO TO «MULTIPLEX COMMUNICATION SYSTEM»(ref-235578-S20958542052006062400000) C: GO TO «CAN COMMUNICATION SYSTEM»(ref-235565-S22980917632006062400000) A: Go to next step.
2. READ VALUE OF INTELLIGENT TESTER Check the DATA LIST for proper function of the reverse signal. P-J/B DATA LIST DISPLAY TABLE Item Measurement item/Display (Range) Normal Condition BACKUP LIGHT SW Reverse signal/ON or OFF ON: Shift is R position OFF: Shift is except R position OK: Go to step 7 NG: Go to next step.
3. CHECK VEHICLE TYPE Result VEHICLE TYPE RESULT TABLE M/T A A/T B B: Go to step 8 A: Go to next step.
4. CHECK WIRE HARNESS (BATTERY POSITIVE VOLTAGE) Disconnect the E55 connector. Measure the voltage according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S24190046692006062400000) . Voltage TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition E55-2 - Body ground Engine switch on (IG) 10 to 14 V NG: REPAIR OR REPLACE LH-IG FUSE OR HARNESS AND CONNECTOR OK: Go to next step.
5. CHECK WIRE HARNESS (BACK UP LIGHT SWITCH ASSEMBLY - COWL SIDE J/B LH) Disconnect the E55 and LJ connectors. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S38482996502006062400000) . Resistance TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition E55-1 - LJ-23 (BKUP) Always Below 1 ohms E55-1 - Body ground Always 10 k ohms or higher NG: REPAIR OR REPLACE WIRE HARNESS OK: Go to next step.
6. INSPECT BACK UP LIGHT SWITCH ASSEMBLY Disconnect the E55 connector. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S31004680532006062400000) . Resistance TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition E55-1 - E55-2 ON Below 1 ohms E55-1 - E55-2 OFF 10 k ohms or higher NG: REPLACE BACK UP LIGHT ASSEMBLY OK: REPLACE MAIN BODY ECU LH
7. INSPECT OUTER REAR VIEW MIRROR ASSEMBLY Outer rear view mirror LH: Disconnect the h1 connector. Apply battery voltage and check operation of the mirror face. Standard MEASUREMENT CONDITION SPECIFIED CONDITION TABLE Measurement Condition Mirror Operation Battery positive (+) --> h1-1 (MV) Battery negative (-) --> h1-10 (M+) Turns upward (A) Battery positive (+) --> h1-10 (M+) Battery negative (-) --> h1-1 (MV) Turns downward (B) Battery positive (+) --> h1-9 (MH) Battery negative (-) --> h1-10 (M+) Turns left (C) Battery positive (+) --> h1-10 (M+) Battery negative (-) --> h1-9 (MH) Turns right (D) Outer rear view mirror RH: Disconnect the g1 connector. Apply battery voltage and check operation of the mirror face. Standard MEASUREMENT CONDITION SPECIFIED CONDITION TABLE Measurement Condition Mirror Operation Battery positive (+) --> g1-1 (MV) Battery negative (-) --> g1-10 (M+) Turns upward (A) Battery positive (+) --> g1-10 (M+) Battery negative (-) --> g1-1 (MV) Turns downward (B) Battery positive (+) --> g1-9 (MH) Battery negative (-) --> g1-10 (M+) Turns left (C) Battery positive (+) --> g1-10 (M+) Battery negative (-) --> g1-9 (MH) Turns right (D) NG: REPLACE OUTER REAR VIEW MIRROR ASSEMBLY OK: REPLACE OUTER MIRROR CONTROL ECU
8. CHECK WIRE HARNESS (BATTERY POSITIVE VOLTAGE) Disconnect the E45 connector. Measure the voltage according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S03624621672006062400000) . Voltage TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition E45-2 - Body ground Engine switch on (IG) 10 to 14 V NG: REPAIR OR REPLACE LH-IG FUSE OR HARNESS AND CONNECTOR OK: Go to next step.
9. CHECK WIRE HARNESS (PARK/NEUTRAL POSITION SWITCH - ECM) Disconnect the E45 and E4 connectors. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S30099471012006062400000) . Resistance TESTER CONDITION SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition E45-1 - E4-8 Always Below 1 ohms E45-1 - Body ground Always 10 k ohms or higher NG: REPAIR OR REPLACE WIRE HARNESS OK: Go to next step.
10. INSPECT PARK/NEUTRAL POSITION SWITCH ASSEMBLY Disconnect the E45 connector. Measure the resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S15760702962006062400000) . Resistance TESTER CONDITION SPECIFIED CONDITION TABLE Shift Position Tester Connection Specified Condition P E45-1 - E45-2 Below 1 ohms Except P E45-1 - E45-2 10 k ohms or higher NG: REPLACE PARK/NEUTRAL POSITION SWITCH ASSEMBLY OK: Go to next step.
11. REPLACE GATEWAY ECU Replace the gateway ECU.
12. confirm mirror operation NG: REPLACE ECM OK: END

This is the power source circuit for the outer mirror control ECU.

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1. INSPECT OUTER MIRROR CONTROL ECU (POWER SOURCE) Disconnect the L10 (M10) connector. ( ): RH side Measure the voltage and resistance according to the value(s) in «TESTER CONDITION SPECIFIED CONDITION TABLE»(ref-235597-S21194240372006062400000) . Outer mirror control ECU RH: Voltage TESTER CONDITION SPECIFIED CONDITION TABLE (VOLTAGE) Tester Connection Condition Specified Condition L10-6 (BDR) - Body ground Always 10 to 14 V L10-4 (CPUB) - Body ground Always 10 to 14 V L10-3 (SIG) - Body ground Engine switch on (IG) 10 to 14 V Resistance TESTER CONDITION SPECIFIED CONDITION TABLE (RESISTANCE) Tester Connection Condition Specified Condition L10-1 (GND) - Body ground Always Below 1 ohms Outer mirror control ECU LH: Voltage TESTER CONDITION SPECIFIED CONDITION TABLE (VOLTAGE) Tester Connection Condition Specified Condition M10-6 (BDR) - Body ground Always 10 to 14 V M10-4 (CPUB) - Body ground Always 10 to 14 V M10-3 (SIG) - Body ground Engine switch on (IG) 10 to 14 V Resistance TESTER CONDITION SPECIFIED CONDITION TABLE (RESISTANCE) Tester Connection Condition Specified Condition M10-1 (GND) - Body ground Always Below 1 ohms NG: REPAIR OR REPLACE WIRE HARNESS OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

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