Scheme 48
![Scheme 48: SYMPTOM TROUBLESHOOTING WIRING DIAGRAM [MZR 2.5]](https://i.diagnostdata.com/repair/a9/a90558c4947e325483fc3306970cf6e2d190317b33c4b1e8c7539280e8ffd640.webp)
Scheme 49
Scheme 50
![Scheme 50: FOREWORD [MZR 2.5]](https://i.diagnostdata.com/repair/82/82eb35649d73a241b8263dd941878a52d79f3a54bbfd92fdf41c1ab365781ef6.webp)
- When the customer reports a vehicle malfunction, check the malfunction indicator lamp (MIL) indication and diagnostic trouble code (DTC), then diagnose the malfunction according to the following flowchart: If a DTC exists, diagnose the applicable DTC inspection. (See «DTC TABLE [MZR 2.5]»(ref-581633-S19834179122013101400000) .) If no DTC exists and the MIL does not illuminate or flash, diagnose the applicable symptom troubleshooting. (See «QUICK DIAGNOSTIC CHART [MZR 2.5]»(ref-581642-S20436574352013101400000) .) *: Malfunction indicator lamp (MIL), generator warning light, security light
Main Relay Operation Inspection
- Verify that the main relay clicks when the ignition to ON and off. If there is no operation sound, inspect the following: Main relay (See «RELAY INSPECTION»(ref-581640-S26749992412013101400000) .) Harness and connector between ignition switch and main relay Harness and connector between PCM terminal 1Q and main relay
Brake override system operation inspection
Note. If the brake override system operates normally after performing the following inspection, the PCM detects DTC P2299:00.
- Start the engine and run it is idling.
- Verify that the engine speed becomes less than 1,100 rpm under the following conditions. Neutral (MTX) P or N position (ATX) Engine speed of 1,150 rpm or more other than idle Brake pedal depressed If the engine speed becomes less than 1,100 rpm , clear the PCM DTC using the M-MDS. (System operation is normal.) (See «ON-BOARD DIAGNOSTIC TEST [MZR 2.5]»(ref-581633-S34331335932013101400000) .) If the engine speed does not become less than 1,100 rpm , inspect for the following parts, then repair or replace the malfunctioning part: APP sensor (See «ACCELERATOR PEDAL POSITION (APP) SENSOR INSPECTION [MZR 2.5]»(ref-581641-S17206746452013101400000) .) Neutral switch (MTX) (See «NEUTRAL SWITCH INSPECTION [MZR 2.5]»(ref-581641-S12392617192013101400000) .) CPP switch (MTX) (See «CLUTCH PEDAL POSITION (CPP) SWITCH INSPECTION [MZR 2.5]»(ref-581641-S07778649072013101400000) .) TR switch (ATX) (See «TRANSAXLE RANGE (TR) SWITCH INSPECTION [FS5A-EL]»(ref-581660-S00019717112013101400000) .) Brake switch No.1 (See «BRAKE SWITCH INSPECTION»(ref-581625-S25301323462013101400000) .) Brake switch No.2 (See «BRAKE SWITCH INSPECTION»(ref-581625-S25301323462013101400000) .) Communication between PCM and TCM (ATX) (See «FOREWORD [MULTIPLEX COMMUNICATION SYSTEM]»(ref-581624-S39967695272013101400000) .)
Variable Intake Air Control Operation Inspection
- Start the engine.
- Inspect the rod operation under the following condition: Rod operation Engine speed 4,400 rpm Below Above Shutter valve actuator Operate Not operate If the rod operation is not as specified, inspect as follows: Stop the engine. Connect the M-MDS to the DLC-2. Verify that DTC P0661:00 or P0662:00 is not displayed. (See «ON-BOARD DIAGNOSTIC TEST [MZR 2.5]»(ref-581633-S34331335932013101400000) .) If DTC P0661:00 or P0662:00 is shown, perform DTC inspection. (See «DTC P0661:00 [MZR 2.5]»(ref-581633-S20765225042013101400000) .) (See «DTC P0662:00 [MZR 2.5]»(ref-581633-S09135908212013101400000) .) Inspect the variable intake air solenoid valve. (See «VARIABLE INTAKE AIR SOLENOID VALVE INSPECTION [MZR 2.5]»(ref-581645-S00194885502013101400000) .) If the variable intake air solenoid valve is not normal, replace the variable intake air solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.5]»(ref-581645-S06665670962013101400000) .) If the variable intake air solenoid valve is normal, inspect the following: Vacuum hose and vacuum chamber for looseness or damage Shutter valve actuator (See «VARIABLE INTAKE AIR SHUTTER VALVE ACTUATOR INSPECTION [MZR 2.5]»(ref-581645-S33530929552013101400000) .) Shutter valve stuck open or closed
Variable Tumble Control Operation Inspection
- Connect the M-MDS to the DLC-2.
- Access the PCM PID ECT. (See «ON-BOARD DIAGNOSTIC TEST [MZR 2.5]»(ref-581633-S34331335932013101400000) .)
- Verify that ECT PID is between 60 °C {140 °F} and 67 °C {153 °F} .
- Start the engine.
- Inspect rod operation under the following conditions: Rod operation Engine speed 3,750 rpm Below Above Shutter valve actuator Operate Not operate If the rod operation is not specified, inspect as follows: Verify that DTC P2009:00 or P2010:00 is not displayed. (See «ON-BOARD DIAGNOSTIC TEST [MZR 2.5]»(ref-581633-S34331335932013101400000) .) If DTC P2009:00 or P2010:00 are shown, perform DTC inspection. (See «DTC P2009:00 [MZR 2.5]»(ref-581633-S39854280512013101400000) .) (See «DTC P2010:00 [MZR 2.5]»(ref-581633-S03494233072013101400000) .) Inspect the variable tumble solenoid valve. (See «VARIABLE TUMBLE SOLENOID VALVE INSPECTION [MZR 2.5]»(ref-581645-S23219006172013101400000) .) If the variable tumble solenoid valve is not normal, replace the variable tumble solenoid valve. (See «INTAKE-AIR SYSTEM REMOVAL/INSTALLATION [MZR 2.5]»(ref-581645-S06665670962013101400000) .) If the variable tumble solenoid valve is normal, inspect the following: Vacuum hose and vacuum chamber for looseness or damage Shutter valve actuator (See «VARIABLE TUMBLE SHUTTER VALVE ACTUATOR INSPECTION [MZR 2.5]»(ref-581645-S34433823142013101400000) .) Shutter valve stuck open or closed
Fuel Injector Operation Inspection
| STEP | INSPECTION | RESULTS | ACTION |
|---|---|---|---|
| 1 | Start the engine and warm it up until normal operating temperature. Connect the M-MDS to the DLC-2. Select the INJ#1, INJ#2, INJ#3 and INJ#4 PIDs. (See ON-BOARD DIAGNOSTIC TEST [MZR 2.5] .) Turn the fuel injector from on to off using the PIDs each cylinder. Does the engine speed drop? | Yes | Fuel injector work properly. |
| No | Go to the next step. | ||
| 2 | Disconnect the fuel injector that the engine speed does not drop at Step 1. Switch the ignition to ON. Measure the voltage between suspect fuel injector terminal A (wiring harness-side) and body ground. Is the voltage B+ ? | Yes | Go to the next step. |
| No | Repair or replace for open or short circuit between fuel injector terminal A and fuel pump relay terminal C. | ||
| 3 | Inspect for open or short circuit between suspect fuel injector terminal B and following PCM terminals: Fuel injector No.1 PCM terminal 2BB Fuel injector No.2 PCM terminal 2BC Fuel injector No.3 PCM terminal 2BD Fuel injector No.4 PCM terminal 2AZ Is there any malfunction? | Yes | Repair or replace suspected wiring harness and connector. |
| No | Go to the next step. | ||
| 4 | Inspect the suspect fuel injector. (See FUEL INJECTOR INSPECTION [MZR 2.5] .) Is the fuel injector normal? | Yes | Replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.5] .) |
| No | Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.5] .) |
FUEL INJECTOR OPERATION INSPECTION - IF SIMULATION FUNCTION OF M-MDS IS USED FUEL INJECTOR OPERATION INSPECTION - IF SIMULATION FUNCTION OF M-MDS IS USED
| STEP | INSPECTION | RESULTS | ACTION |
|---|---|---|---|
| 1 | While cranking the engine, inspect for fuel injector operation sound at each cylinder using a soundscope. Is the operation sound heard? | Yes | Fuel injector work properly. |
| No | Go to the next step. | ||
| 2 | Disconnect the fuel injector that the fuel injector operation sound does not heard at Step 1. Switch the ignition to ON. Measure the voltage between suspect fuel injector terminal A (wiring harness-side) and body ground. Is the voltage B+ ? | Yes | Go to the next step. |
| No | Repair or replace for open or short circuit between fuel injector terminal A and fuel pump relay terminal C. | ||
| 3 | Inspect for open or short circuit between suspect fuel injector terminal B and following PCM terminals: Fuel injector No.1 PCM terminal 2BB Fuel injector No.2 PCM terminal 2BC Fuel injector No.3 PCM terminal 2BD Fuel injector No.4 PCM terminal 2AZ Is there any malfunction? | Yes | Repair or replace suspected wiring harness and connector. |
| No | Go to the next step. | ||
| 4 | Inspect the suspect fuel injector. (See FUEL INJECTOR INSPECTION [MZR 2.5] .) Is the fuel injector normal? | Yes | Replace the PCM. (See PCM REMOVAL/INSTALLATION [MZR 2.5] .) |
| No | Replace the fuel injector. (See FUEL INJECTOR REMOVAL/INSTALLATION [MZR 2.5] .) |
FUEL INJECTOR OPERATION INSPECTION - IF SIMULATION FUNCTION OF M-MDS IS USED FUEL INJECTOR OPERATION INSPECTION - IF SIMULATION FUNCTION OF M-MDS IS USED
Fuel Pump Operation Inspection
- Remove the fuel-filler cap.
- Switch the ignition to ON.
- Turn the fuel pump relay from off to on using the FP PID and inspect if the operation sound is heard. (See «ON-BOARD DIAGNOSTIC TEST [MZR 2.5]»(ref-581633-S34331335932013101400000) .) If no operation sounds is heard, proceed to next step.
- Measure voltage at wiring harness side fuel pump terminal B Specification B+ (Ignition at on) If the voltage is as specified, inspect the following: Fuel pump continuity Fuel pump ground Wiring harness between fuel pump relay and PCM terminal 1BG If not as specified, inspect the following: Fuel pump relay (See «RELAY INSPECTION»(ref-581640-S26749992412013101400000) .) Wiring harness connector (Main relay-Fuel pump relay-Fuel pump)