Home

Mazdamanuals.com

DTC P1B20:00 [Mazda M Hybrid BATTERY]

id140204314900

Details On DTCs

Description

Mazda M Hybrid battery (current sensor): Measurement difference error

Detection condition

Determination conditions

•  The absolute value of the average value of the current measured several times is higher than 15 A.

Preconditions

•  Mazda M Hybrid battery is the following conditions (PID: BECM_STAT)

―  INITIAL

Malfunction determination period

•  0.05 s period

Drive cycle

•  1

Self test type

•  CMDTC self test, ODDTC self test

Sensor used

•  Mazda M Hybrid battery

Fail-safe function

•  Stops power supply from the Mazda M Hybrid battery and supplies power to the vehicle’s electrical devices (12 V power supply) from the 12 V battery.

•  Inhibits the i-stop control.

•  Inhibits the non-power generation control.

•  Inhibits regenerative braking by the integrated starter generator (ISG).

•  Inhibits motor assist control by the integrated starter generator (ISG).

Vehicle status when DTCs are output

•  If the vehicle continues to be driven while the DTC is detected, the 12 V battery will be depleted and the vehicle can no longer be driven.

•  Inhibits the i-stop control.

Possible cause

•  Mazda M Hybrid battery malfunction

Description	Mazda M Hybrid battery (current sensor): Measurement difference error
Detection condition	Determination conditions	• The absolute value of the average value of the current measured several times is higher than 15 A.
Preconditions	• Mazda M Hybrid battery is the following conditions (PID: BECM_STAT) ― INITIAL
Malfunction determination period	• 0.05 s period
Drive cycle	• 1
Self test type	• CMDTC self test, ODDTC self test
Sensor used	• Mazda M Hybrid battery
Fail-safe function	• Stops power supply from the Mazda M Hybrid battery and supplies power to the vehicle’s electrical devices (12 V power supply) from the 12 V battery. • Inhibits the i-stop control. • Inhibits the non-power generation control. • Inhibits regenerative braking by the integrated starter generator (ISG). • Inhibits motor assist control by the integrated starter generator (ISG).
Vehicle status when DTCs are output	• If the vehicle continues to be driven while the DTC is detected, the 12 V battery will be depleted and the vehicle can no longer be driven. • Inhibits the i-stop control.
Possible cause	• Mazda M Hybrid battery malfunction

System Wiring Diagram

• Not applicable

Function Explanation (DTC Detection Outline)

• If the measurement difference of the current sensor is larger than the threshold when the Mazda M Hybrid battery is activated, the Mazda M Hybrid battery determines a malfunction and stores a DTC.

Repeatability Verification Procedure

1. Switch the ignition off and wait for 35 s or more.

2. Switch the ignition ON (engine off or on) and wait for 10 s or more.

3. Perform the road test.

Note

• When an upward motion vibration is applied such as when driving over an uneven road, the Mazda M Hybrid battery could display a DTC.

• Perform the road test on an uneven road.

PID Item/Simulation Item Used In Diagnosis

• Not applicable

Diagnostic Procedure

Step

Inspection

Results

Action

1

RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION

•  Record the snapshot data.

Note

•  Recording can be facilitated using the screen capture function of the PC.

—

Go to the next step.

2

VERIFY WHETHER MALFUNCTION IS PRESENT OR PAST

•  Perform the DTC inspection for the Mazda M Hybrid battery.
(See DTC INSPECTION.)

•  Is DTC P1B20:00 a present malfunction?

Yes

Go to the next step.

No

Go to Step 4.

3

VERIFY Mazda M Hybrid BATTERY DTC AGAIN

•  Switch the ignition off and wait for 35 s or more.

•  Switch the ignition ON (engine off or on) and wait for 10 s or more.

•  Perform the DTC inspection for the Mazda M Hybrid battery.
(See DTC INSPECTION.)

•  Is DTC P1B20:00 a present malfunction?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction recurs, replace the Mazda M Hybrid battery and perform the repair completion verification.
(See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)

No

Go to the next step.

4

INSPECT Mazda M Hybrid BATTERY FOR MALFUNCTION DEPENDING ON REPEATABILITY

•  Implement the repeatability verification procedure.
(See Repeatability Verification Procedure.)

•  Perform the DTC inspection for the Mazda M Hybrid battery.
(See DTC INSPECTION.)

•  Is DTC P1B20:00 a present malfunction?

Yes

Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error.

(See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].)

If the CAN communication is normal, perform the diagnosis from Step 1.

•  If the malfunction recurs, replace the Mazda M Hybrid battery and perform the repair completion verification.
(See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)

No

The system is normal. (Explain to the customer that a DTC may be displayed when large vibration is applied in the upward/downward direction such as when driving over an uneven road.)

Go to the next step.

Repair completion verification

VERIFY IF OTHER DTCs DISPLAYED

•  Perform the DTC inspection.
(See DTC INSPECTION.)

•  Are any other DTCs displayed?

Yes

Repair the malfunctioning location according to the applicable DTC troubleshooting.

No

DTC troubleshooting completed.

Step	Inspection	Results	Action
1	RECORD VEHICLE STATUS WHEN DTC WAS DETECTED TO UTILIZE WITH REPEATABILITY VERIFICATION • Record the snapshot data. Note • Recording can be facilitated using the screen capture function of the PC.	—	Go to the next step.
2	VERIFY WHETHER MALFUNCTION IS PRESENT OR PAST • Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) • Is DTC P1B20:00 a present malfunction?	Yes	Go to the next step.
2		No	Go to Step 4.
3	VERIFY Mazda M Hybrid BATTERY DTC AGAIN • Switch the ignition off and wait for 35 s or more. • Switch the ignition ON (engine off or on) and wait for 10 s or more. • Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) • Is DTC P1B20:00 a present malfunction?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the Mazda M Hybrid battery and perform the repair completion verification. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
3		No	Go to the next step.
4	INSPECT Mazda M Hybrid BATTERY FOR MALFUNCTION DEPENDING ON REPEATABILITY • Implement the repeatability verification procedure. (See Repeatability Verification Procedure.) • Perform the DTC inspection for the Mazda M Hybrid battery. (See DTC INSPECTION.) • Is DTC P1B20:00 a present malfunction?	Yes	Refer to the controller area network (CAN) malfunction diagnosis flow to inspect for a CAN communication error. (See CONTROLLER AREA NETWORK (CAN) MALFUNCTION DIAGNOSIS FLOW [(E)].) If the CAN communication is normal, perform the diagnosis from Step 1. • If the malfunction recurs, replace the Mazda M Hybrid battery and perform the repair completion verification. (See Mazda M Hybrid BATTERY REMOVAL/INSTALLATION.)
4		No	The system is normal. (Explain to the customer that a DTC may be displayed when large vibration is applied in the upward/downward direction such as when driving over an uneven road.) Go to the next step.
Repair completion verification	VERIFY IF OTHER DTCs DISPLAYED • Perform the DTC inspection. (See DTC INSPECTION.) • Are any other DTCs displayed?	Yes	Repair the malfunctioning location according to the applicable DTC troubleshooting.
Repair completion verification		No	DTC troubleshooting completed.