Multiplex Communication: Overview Lexus IS II

DESCRIPTION

This DTC is detected when communication between the main body ECU RH (cowl side J/B RH) and gateway ECU stops for more than 10 seconds.

DETECTION ITEM AND TROUBLE AREA TABLE

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HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1200, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. INSPECT FUSE (FR DOOR RH) Remove the FR DOOR RH fuse from the cowl side J/B RH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (MAIN BODY ECU RH - BATTERY AND BODY GROUND) Disconnect the main body ECU RH connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition BATB (RJ-15) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND2 (RD-7) - Body ground Below 1 ohms GND1 (RD-17) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the J75 and RJ ECU connectors. Disconnect the J76 ECU connector. Disconnect the P33 ECU connector. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX2 (J75-21) - MPD1 (J76-3) Below 1 ohms MPX1 (RJ-21) - MPX1 (P33-27) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPLACE BODY ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE BODY ECU

This DTC is detected when communication between the AFS ECU and the gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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HINT

When "+B of GND short malfunction of communication bus" DTCs (B1266 and B1267) are detected at the same time as "communication stop" DTC B1205, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. INSPECT FUSE (H-LP LVL) Remove the H-LP LVL fuse from the cowl side J/B LH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (AFS ECU - BATTERY AND BODY GROUND) Disconnect the A27 ECU connector. Turn the engine switch on (IG). Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition IG (A27-2) - Body ground Engine switch on (IG) 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition E1 (A27-1) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the A27, J58 and J34 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (A27-5) - MPX- (J58-31) Below 1 ohms MPX2 (A27-6) - MPX+ (J34-6) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPLACE AFS ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE AFS ECU

This DTC is detected when communication between the multiplex network master switch (Power window master switch) and gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1206, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. INSPECT FUSE (FR DOOR LH) Remove the FR DOOR LH fuse from the cowl side J/B LH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (POWER WINDOW MASTER SWITCH - BATTERY AND BODY GROUND) Disconnect the M7 switch connector. Turn the engine switch on (IG). Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition BDR (M7-10) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Connection GND (M7-2) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the M7, Q3 and P33 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (M7-7) - MPX1 (Q3-15) Below 1 ohms MPX2 (M7-8) - MPX2 (P33-28) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE POWER WINDOW MASTER SWITCH C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE POWER WINDOW MASTER SWITCH

HINT

This DTC is only output on vehicles equipped with a smart access with push-button start.

This DTC is detected when communication between the Certification ECU and gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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HINT

When "B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1206, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. INSPECT FUSE (SECURITY) Remove the SECURITY fuse from the cowl side J/B LH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (CERTIFICATION ECU - BATTERY AND BODY GROUND) Disconnect the P33 ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition +B1 (P33-1) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition E (P33-17) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the P33, RJ and M7 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (P33-27) - MPX1 (RJ-21) Below 1 ohms MPX2 (P33-28) - MPX2 (M7-8) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE CERTIFICATION ECU C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE CERTIFICATION ECU

This DTC is detected when communication between the outer mirror control ECU RH (Passenger Side Outer Mirror ECU) and gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1208, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. INSPECT FUSE (FR DOOR RH, MPX-B) Remove the FR DOOR RH fuse from the cowl side J/B RH. Remove the MPX-B fuse from the engine room R/B No. 1. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (OUTER MIRROR CONTROL ECU - BATTERY AND BODY GROUND) Disconnect the L10 ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition BDR (L10-6) - Body ground Always 10 to 14 V CPUB (L10-4) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND (L10-1) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the L10, P33 and RJ ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (L10-8) - MPX1 (P33-27) Below 1 ohms MPX1 (L10-8) - MPX1 (RJ-21) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR OR REPLACE OUTER MIRROR CONTROL ECU AND REPAIR C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE OUTER MIRROR CONTROL ECU

This DTC is detected when communication between the outer mirror control ECU LH (Driver Side Outer Mirror) and gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1209, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. INSPECT FUSE (FR DOOR LH) Remove the FR DOOR LH fuse from the cowl side J/B LH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK HARNESS AND CONNECTOR (OUTER MIRROR CONTROL ECU - BATTERY AND BODY GROUND) Disconnect the M10 ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition BDR (M10-6) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND (M10-1) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the M10, J55 and 2F ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (M10-8) - MPX2 (J55-24) Below 1 ohms MPX1 (M10-8) - 2F-5 Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE OUTER MIRROR CONTROL ECU C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE OUTER MIRROR CONTROL ECU

HINT

This DTC is only output on vehicles equipped with a smart access with push-button start.

This DTC is detected when communication between the power source control ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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1. INSPECT FUSE (AM2) Remove the AM2 fuse from the cowl side J/B RH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (POWER SOURCE CONTROL ECU - BATTERY AND BODY GROUND) Disconnect the J55 ECU connector. Measure the resistance and voltage of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition J55-33 (AM1) - Body ground Always 10 to 14 V J55-12 (AM2) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition J55-6 (GND2) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the J55, J26 and 2F ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (J55-7) - MPX2 (J26-7) Below 1 ohms MPX2 (J55-24) - 2F-5 Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPLACE POWER SOURCE CONTROL ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE POWER SOURCE CONTROL ECU

This DTC is detected when communication between the tilt and telescopic ECU and the gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1213, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. INSPECT FUSE (TI & TE, MPX-B) Remove the TI & TE fuse from the cowl side J/B RH. Remove the MPX-B fuse from the engine room R/B No. 1. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (TILT AND TELESCOPIC ECU - BATTERY AND BODY GROUND) Disconnect the J28 ECU connector. Measure the resistance and voltage of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition +B (J28-2) - Body ground Always 10 to 14 V ECUB (J28-9) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND (J28-11) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the J28, RA and RJ ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (J28-5) - MPX1 (P33-27) Below 1 ohms MPX1 (J28-5) - RA-20 Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE TILT AND TELESCOPIC ECU C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE TILT AND TELESCOPIC ECU

When a +B short circuit or body ground short circuit is detected on the door system communication bus (BEAN), BEAN is disabled and a DTC is output.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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1. CHECK DIAGNOSTIC TROUBLE CODE (A ECU) Disconnect the A ECU connector and check for DTCs B1214 and B1215. OK: Neither DTC B1214 nor DTC B1215 is output. NOTE: Reconnect the connector before starting the next check. HINT: The A ECU in the door system bus represents the main body ECU RH. If the result is as specified, the disconnected A ECU (main body ECU RH) is malfunctioning. OK: REPLACE A ECU NG: Go to next step.
2. CHECK DIAGNOSTIC TROUBLE CODE (B ECU) Disconnect the A ECU and B ECU connectors and check for DTCs B1214 and B1215. OK: Neither DTC B1214 nor DTC B1215 is output. NOTE: Disconnect the connectors one by one. Reconnect the connectors before starting the next check. HINT: Remove the B ECUs in the following order: Tilt and telescopic ECU Power window switch (Front RH) Power window master switch Certification ECU Power source control ECU Power window switch (Rear LH) Position control ECU and Switch (Front RH seat) Position control ECU and Switch (Front LH seat) Power window switch (Rear RH) Main body ECU LH Outer mirror control ECU (RH) Outer mirror control ECU (LH) Front controller Overhead J/B Rain sensor Sliding roof control ECU If the result is as specified, the disconnected B ECU (one of the ECUs from the above list) or the wire harness between the A ECU and B ECU is malfunctioning. After the DTC is cleared, proceed to the next step. NG: Go to step 4 OK: Go to next step.
3. CHECK WIRE HARNESS BETWEEN A ECU AND B ECU Disconnect the B ECU connector and check for DTCs B1214 and B1215. OK: Neither DTC B1214 nor DTC B1215 is output. NOTE: Reconnect the connector before starting the next check. HINT: If the result is as specified, the wire harness between the A ECU and B ECU is functioning normally but the disconnected B ECU is malfunctioning. NG: REPAIR OR REPLACE WIRE HARNESS BETWEEN A ECU AND B ECU OK: REPLACE B ECU
4. CHECK DIAGNOSTIC TROUBLE CODE (C ECU) Disconnect the B ECU and C ECU connectors and check for DTCs B1214 and B1215. OK: Neither DTC B1214 nor DTC B1215 is output. NOTE: Disconnect the connectors one by one. Reconnect the connectors before starting the next check. HINT: The C ECU in the door system bus represents the windshield wiper switch. If the result is as specified, the disconnected C ECU (windshield wiper switch) or the wire harness between the B ECU and C ECU is malfunctioning. NG: Go to step 6 OK: Go to next step.
5. CHECK WIRE HARNESS BETWEEN B ECU AND C ECU Disconnect the C ECU connector and check for DTCs B1214 and B1215. OK: Neither DTC B1214 nor DTC B1215 is output. NOTE: Reconnect the connector before starting the next check. HINT: If the result is as specified, the wire harness between the B ECU and C ECU is functioning normally but the disconnected C ECU is malfunctioning. NG: REPAIR OR REPLACE WIRE HARNESS BETWEEN B ECU AND C ECU OK: REPLACE C ECU
6. CHECK WIRE HARNESS BETWEEN NETWORK GATEWAY ECU AND A ECU OR C ECU Check for a short-circuit in B+ or body ground. Disconnect the A ECU, C ECU and multiplex network gateway ECU connectors. Measure the voltage and resistance of the wire harness side connectors. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition A ECU connector/multiplex network gateway ECU connector - Body ground Below 1 V C ECU connector/multiplex network gateway ECU connector - Body ground Below 1 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition A ECU connector/multiplex network gateway ECU connector - Body ground 10 k ohms or higher C ECU connector/multiplex network gateway ECU connector - Body ground 10 k ohms or higher HINT: The A ECU in the door system bus represents the main body ECU RH. The C ECU in the door system bus represents the windshield wiper switch. NG: REPAIR OR REPLACE WIRE HARNESS BETWEEN NETWORK GATEWAY ECU AND A ECU OR C ECU OK: REPLACE MULTIPLEX NETWORK GATEWAY ECU

This DTC is detected when the communication between the tire pressure monitor ECU and gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 33

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1266 and B1267) are detected at the same time as "communication stop" DTC B1209, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. INSPECT FUSE (ECU-IG LH) Remove the ECU-IG LH fuse from the cowl side J/B LH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (TIRE PRESSURE MONITOR ECU - BATTERY AND BODY GROUND) Disconnect the J49 ECU connector. Measure the voltage and resistance of the wire harness side connector Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition IG (J49-1) - Body ground Engine switch on (IG) 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND (J49-6) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE COMMUNICATION LINE Disconnect the J49, J34 and J76 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (J49-3) - MPX- (J34-18) Below 1 ohms MPX2 (J49-2) - MPI1 (J76-4) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR C: REPLACE TIRE PRESSURE MONITOR ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE TIRE PRESSURE MONITOR ECU

This DTC is detected when communication between the AVC-LAN (radio receiver assembly or multi-display assembly) and multiplex network gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

This DTC is detected when communication between the air conditioning amplifier (A/C ECU) and gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 36

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1262, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. CHECK FUSE (A/C) Remove the A/C fuse from the cowl side J/B LH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (AIR CONDITIONING AMPLIFIER - BATTERY AND BODY GROUND) Disconnect the J58 ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition B (J58-1) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND (J58-20) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the J58, A27, J34 and J76 ECU connectors. Measure the resistance of the wire harness side connector. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX- (J58-31) - MPX1 (A27-5) (1) Below 1 ohms MPX- (J58-31) - MPX+ (J34-6) (2) Below 1 ohm MPX+ (J58-30) - MPI2 (J76-13) Below 1 ohms (1) w/Adaptive front-lighting system (2) w/o Adaptive front-lighting system Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPLACE AIR CONDITIONING AMPLIFIER AND REPAIR OR REPLACE HARNESS OR CONNECTOR C: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

When a +B short circuit or body ground short circuit is detected on the instrument panel system communication bus (BEAN), the instrument panel system communication bus (BEAN) is disabled and a DTC code is output.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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1. CHECK DIAGNOSTIC TROUBLE CODE (A ECU) Disconnect the A ECU connector and check for DTCs B1266 and B1267. OK: Neither DTC B1266 nor DTC B1267 is output. NOTE: Reconnect the connector before starting the next check. HINT: The A ECU in the instrument panel system bus represents the air conditioning amplifier. If the result is as specified, the disconnected A ECU (air conditioning amplifier) is malfunctioning. OK: REPLACE A ECU NG: Go to next step.
2. CHECK DIAGNOSTIC TROUBLE CODE (B ECU) Disconnect the A ECU and B ECU connectors and check for DTCs B1266 and B1267. OK: Neither DTC B1266 nor DTC B1267 is output. NOTE: Disconnect the connectors one by one. Reconnect the connectors before starting the next check. HINT: Remove the B ECUs in the following order: AFS ECU Clearance warning ECU Combination meter ECU If the result is as specified, the disconnected B ECU (one of the ECUs from the above list) or the wire harness between the A ECU and B ECU is malfunctioning. After the DTC is cleared, proceed to the next step. NG: Go to step 4 OK: Go to next step.
3. CHECK WIRE HARNESS BETWEEN A ECU AND B ECU Disconnect the B ECU connector and check for DTCs B1266 and B1267. OK: Neither DTC B1266 nor DTC B1267 is output. NOTE: Reconnect the connector before starting the next check. HINT: If the result is as specified, the wire harness between the A ECU and B ECU is functioning normally but the disconnected B ECU is malfunctioning. NG: REPAIR OR REPLACE WIRE HARNESS BETWEEN A ECU AND B ECU OK: REPLACE B ECU
4. CHECK DIAGNOSTIC TROUBLE CODE (C ECU) Disconnect the B ECU and C ECU connectors and check for DTCs B1266 and B1267. OK: Neither DTC B1266 nor DTC B1267 is output. NOTE: Disconnect the connectors one by one. Reconnect the connectors before starting the next check. HINT: The C ECU in the instrument panel system bus represents the tire pressure warning ECU. If the result is as specified, the disconnected C ECU (tire pressure warning ECU) or the wire harness between the B ECU and C ECU is malfunctioning. NG: Go to step 6 OK: Go to next step.
5. CHECK WIRE HARNESS BETWEEN B ECU AND C ECU Disconnect the C ECU connector and check for DTCs B1266 and B1267. OK: Neither DTC B1266 nor DTC B1267 is output. NOTE: Reconnect the connector before starting the next check. HINT: If the result is as specified, the wire harness between the B ECU and C ECU is functioning normally but the disconnected C ECU is malfunctioning. NG: REPAIR OR REPLACE WIRE HARNESS BETWEEN B ECU AND C ECU OK: REPLACE C ECU
6. CHECK WIRE HARNESS BETWEEN GATEWAY ECU AND A ECU OR C ECU Check for a short-circuit in B+ or body ground. Disconnect the A ECU, C ECU and multiplex network gateway ECU connectors. Measure the resistance and voltage of the wire harness side connectors. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition A ECU connector/multiplex network gateway ECU connector - Body ground Below 1 V C ECU connector/multiplex network gateway ECU connector - Body ground Below 1 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition A ECU connector/multiplex network gateway ECU connector - Body ground 10 k ohms or higher C ECU connector/multiplex network gateway ECU connector - Body ground 10 k ohms or higher HINT: The A ECU in the instrument panel system bus represents the air conditioning amplifier. The C ECU in the instrument panel system bus represents the tire pressure monitor ECU. NG: REPAIR OR REPLACE WIRE HARNESS BETWEEN GATEWAY ECU AND A ECU OR C ECU OK: REPLACE MULTIPLEX NETWORK GATEWAY ECU

This DTC is detected when communication between the combination meter ECU and multiplex network gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

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HINT

When "+B of GND short malfunction of communication bus" DTCs (B1266 and B1267) are detected at the same time as "communication stop" DTC B1271, repair the "+B or GND short malfunction of communication bus" DTCs first.

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1. INSPECT FUSE (DOME, MPX-B) Remove the DOME and MPX-B fuses from the engine room J/B No. 1. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (COMBINATION METER ECU - BATTERY AND BODY GROUND) Disconnect the J34 ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition B (J34-23) - Body ground Always 10 to 14 V B (J34-24) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition E2 (J34-1) - Body ground Below 1 ohms ES (J34-13) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the J34, J49, J76, A27 and J58 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX- (J34-18) - MPX1 (J49-3) (3) Below 1 ohms MPX- (J34-18) - MPI1 (J76-4) (4) Below 1 ohms MPX+ (J34-6) - MPX2 (A27-6) (1) Below 1 ohms MPX+ (J34-6) - MDX- (J58-31) (2) Below 1 ohms (1) w/ Adaptive front-lighting system (2) w/o Adaptive front-lighting system (3) w/ Tire Pressure Warning System (4) w/o Tire Pressure Warning System Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPLACE COMBINATION METER ECU AND REPAIR OR REPLACE HARNESS OR CONNECTOR C: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE COMBINATION METER ECU

This DTC is detected when communication between the position control ECU and switch (driver seat ECU) and multiplex network gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 49

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1272, repair the "+B or GND short malfunction of communication bus" DTCs first.

Scheme 50

Scheme 51

1. INSPECT FUSE (FR P/SEAT LH, MPX-B) Remove the FR P/SEAT LH fuse from the cowl side J/B LH. Remove the MPX-B fuse from the engine room J/B No. 1. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (POSITION CONTROL ECU AND SWITCH - BATTERY AND BODY GROUND) Disconnect the U7 ECU connector. Measure the voltage and resistance of the wire harness side connector Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition SYSB (U6-5) - Body ground Always 10 to 14 V +B (U7-8) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND (U6-1) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the U6, 2F and J55 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (U7-1) - 2F-5 Below 1 ohms MPX1 (U6-1) - MPX2 (J55-24) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE POSITION CONTROL ECU C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE POSITION CONTROL ECU AND SWITCH

This DTC is detected when communication between the sliding roof control ECU and network gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 52

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1273, repair the "+B or GND short malfunction of communication bus" DTCs first.

Scheme 53

Scheme 54

Scheme 55

1. INSPECT FUSE (S/ROOF) Remove the S/ROOF fuse from the cowl side J/B LH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (SLIDING ROOF CONTROL ECU - BATTERY AND BODY GROUND) Disconnect the R6 ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition B (R6-5) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition E (R6-7) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the R6 and R5 connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (R6-10) - MPX2 (R5-38) Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
4. CHECK RESISTANCE COMMUNICATION LINE Disconnect the R5, J55 and 2F ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX (R5-36) - MPX2 (J55-24) Below 1 ohms MPX (R5-36) - 2F-5 Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE SLIDING ROOF ECU C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE SLIDING ROOF CONTROL ECU

This DTC is detected when communication between the combination switch (windshield wiper switch) and network gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 56

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1278, repair the "+B or GND short malfunction of communication bus" DTCs first.

Scheme 57

Scheme 58

1. INSPECT FUSE (ECU-IG RH, MPX-B) Remove the ECU-IG RH fuse from the cowl side J/B RH. Remove the MPX-B fuse from the engine room J/B No. 1. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (COMBINATION SWITCH ASSEMBLY - BATTERY AND BODY GROUND) Disconnect the J26 ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition B (J26-1) - Body ground Always 10 to 14 V IG (J26-2) - Body ground Engine switch on (IG) 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition E (J26-5) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the J26, J76 and J55 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (J26-6) - MPD2 (J76-12) Below 1 ohms MPX2 (J26-7) - MPX1 (J55-7) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE COMBINATION SWITCH ASSEMBLY C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE COMBINATION SWITCH ASSEMBLY

This DTC is detected when communication between the rain sensor and multiplex network gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 59

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1279, repair the "+B or GND short malfunction of communication bus" DTCs first.

Scheme 60

Scheme 61

Scheme 62

1. INSPECT FUSE (ECU-IG LH) Remove the ECU-IG LH fuse from the cowl side J/B LH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (OVERHEAD J/B - BATTERY AND BODY GROUND) Disconnect the R5 connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition IG (R5-21) - Body ground Engine switch on (IG) 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND2 (R5-40) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK WIRE HARNESS (RAIN SENSOR - BATTERY AND BODY GROUND) Disconnect the R7 connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition SIG (R7-1) - Body ground Engine switch on (IG) 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition ES (R7-3) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
4. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the R7 and R5 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX (R7-2) - MPX1 (R5-37) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR OR REPLACE RAIN SENSOR C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE RAIN SENSOR

This DTC is detected when communication between the main body ECU LH (cowl side J/B LH) and network gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 63

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1280, repair the "+B or GND short malfunction of communication bus" DTCs first.

Scheme 64

Scheme 65

1. INSPECT FUSE (MPX-B) Remove the MPX-B from the engine room J/B No. 1. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (MAIN BODY ECU LH - BATTERY AND BODY GROUND) Disconnect the LD ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition MPX-B (LD-18) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND (LD-3) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the Q3, A30, M7 and 2F ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (Q3-15) - MPX1 (M7-7) Below 1 ohms MPX2 (A30-17) - 2F-6 Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE MAIN BODY ECU LH C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE MAIN BODY ECU LH

SYSTEM DESCRIPTION

This DTC is detected when communication between the position control ECU and switch (passenger ECU) and network gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 66

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1289, repair the "+B or GND short malfunction of communication bus" DTCs first.

Scheme 67

Scheme 68

1. INSPECT FUSE (FR P /SEAT RH, MPX-B) Remove the FR P / SEAT RH fuse from the cowl side J/B RH. Remove the MPX-B fuse from engine room J/B No. 1. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (POSITION CONTROL ECU AND SWITCH - BATTERY AND BODY GROUND) Disconnect the T7 ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Condition Specified Condition +B (T7-5) - Body ground Always 10 to 14 V SYSB (T7-8) - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition GND (T7-1) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the T7, RJ and P33 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition MPX1 (T7-1) - RJ-21 Below 1 ohms MPX1 (T7-1) - MPX1 (P33-27) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE POSITION CONTROL ECU C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE POSITION CONTROL ECU AND SWITCH

This DTC is detected when communication between the front controller and gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 69

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1214 and B1215) are detected at the same time as "communication stop" DTC B1296, repair the "+B or GND short malfunction of communication bus" DTCs first.

Scheme 70

Scheme 71

1. INSPECT FUSE (MPX-B) Remove the MPX-B fuse from the engine room J/B No. 1. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (FRONT CONTROLLER - BATTERY AND BODY GROUND) Disconnect the 2E and 2F ECU connectors. Measure the voltage and resistance of the wire harness side connectors. Standard voltage DTC DETECTION CONDITION AND TROUBLE AREA TABLE Tester Connection Condition Specified Condition 2E-4 - Body ground Always 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition 2F-1 - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the 2F, A30 and J55 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition 2F-6 - MPX2 (A30-17) Below 1 ohms 2F-5 - MPX2 (J55-24) Below 1 ohms Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE FRONT CONTROLLER C: REPAIR OR REPLACE HARNESS OR CONNECTOR A: REPLACE FRONT CONTROLLER

This DTC is detected when communication between the clearance warning ECU and gateway ECU stops for more than 10 seconds.

DTC DETECTION CONDITION AND TROUBLE AREA TABLE

Scheme 72

HINT

When "+B of GND short malfunction of communication bus" DTCs (B1266 and B1267) are detected at the same time as "communication stop" DTC B1297, repair the "+B or GND short malfunction of communication bus" DTCs first.

Scheme 73

Scheme 74

1. INSPECT FUSE (LH-IG) Remove the LH-IG fuse from the cowl side J/B LH. Measure the resistance of the fuse. Standard resistance: Below 1 ohms NG: REPLACE FUSE OK: Go to next step.
2. CHECK WIRE HARNESS (CLEARANCE WARNING ECU - BATTERY AND BODY GROUND) Disconnect the Q37 ECU connector. Measure the voltage and resistance of the wire harness side connector. Standard voltage DTC DETECTION CONDITION AND TROUBLE AREA TABLE Tester Connection Condition Specified Condition IG (Q37-8) - Body ground Engine switch on (IG) 10 to 14 V Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition E (Q37-27) - Body ground Below 1 ohms NG: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: Go to next step.
3. CHECK RESISTANCE OF COMMUNICATION LINE Disconnect the Q37, A27, J58 and J34 ECU connectors. Measure the resistance between the specified terminals on the wire harness side connectors. Standard resistance TESTER CONNECTION AND SPECIFIED CONDITION TABLE Tester Connection Specified Condition M+ (Q37-26) - MPX2 (A27-6) (1) Below 1 ohms M+ (Q37-26) - MPX- (J58-31) (2) Below 1 ohms M+ (Q37-26) - MPX+ (J34-6) Below 1 ohms (1) w/ Adaptive front-lighting system (2) w/o Adaptive front-lighting system Result RESULT DESCRIPTION TABLE Result Proceed to Both are OK A One is OK B Both are NG C B: REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE CLEARANCE WARNING ECU C: REPAIR OR REPLACE HARNESS OR CONNECTOR OK: REPLACE CLEARANCE WARNING ECU