Diagnostic procedure

DTC B1812 DIAGNOSTIC PROCEDURE

STEP	INSPECTION		ACTION
1	INSPECT BACK-UP LIGHT SWITCH CONNECTOR Turn the ignition switch off. Disconnect the back-up light switch connector. (MTX) Disconnect the TR switch connector. (ATX) Inspect the switch connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion). Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 5.
1		No	Go to the next step.
2	INSPECT PJB CONNECTOR Disconnect the PJB connector. Inspect the PJB connector terminals for poor connection (such as damaged/pulled-out pins, and corrosion). Is there any malfunction?	Yes	Repair or replace the terminal, then go to Step 5.
2		No	Go to the next step.
3	INSPECT BACK-UP LIGHT SWITCH SIGNAL CIRCUIT FOR SHORT TO POWER SUPPLY Turn the ignition switch to the ON position (Engine off). Measure the voltage between PJB terminal J-01 AE (wiring harness-side) and body GND. Is the voltage B+?	Yes	Repair or replace the wiring harness for a possible short to power supply, then go to Step 5.
3		No	Go to the next step.
4	INSPECT BACK-UP LIGHT SWITCH Inspect the back-up light switch. (MTX) (See BACK-UP LIGHT SWITCH INSPECTION .) Inspect the TR switch. (ATX) (See TRANSAXLE RANGE (TR) SWITCH INSPECTION .) (See TRANSAXLE RANGE (TR) SWITCH INSPECTION .) Is there any malfunction?	Yes	Replace the back-up light switch (MTX) or TR switch (ATX), then go to the next step. (See BACK-UP LIGHT SWITCH REMOVAL/INSTALLATION .) (See TRANSAXLE RANGE (TR) SWITCH REMOVAL/INSTALLATION .) (See TRANSAXLE RANGE (TR) SWITCH REMOVAL/INSTALLATION .)
4		No	Go to the next step.
5	VERIFY TROUBLESHOOTING COMPLETED Make sure to reconnect all disconnected connectors. Clear the DTC from the PJB memory using the M-MDS. Perform the self-test. (See PJB SELF-TEST ). Is the same DTC present?	Yes	Replace the PJB. (See PASSENGER JUNCTION BOX (PJB) REMOVAL/INSTALLATION .)
5		No	DTC troubleshooting completed.