Safety Warning

DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.

SYS.OK|MANUAL.DB● LIVE

HOMESERVICE MANUALSMAZDA2006B4000 BASE, AUTOMATICREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCETESTING & DIAGNOSISENGINE SYMPTOM TROUBLESHOOTING - (4 OF 5)SYMPTOM TROUBLESHOOTING CHART - ENGINE DRIVEABILITYMIL / TCIL NEVER ON AND MIL / TCIL ALWAYS ON

2006 Mazda B4000 Base, Automatic

Mil / TCIL Never On And Mil / TCIL Always On

2006 Mazda B4000 Base, AutomaticSECTION Mil / TCIL Never On And Mil / TCIL Always On

PINPOINT TEST 13 MIL / TCIL NEVER ON AND MIL / TCIL ALWAYS ON DESCRIPTION

PINPOINT TEST 13	MIL/TCIL NEVER ON MIL/TCIL ALWAYS ON
DESCRIPTION	Malfunction indicator lamp (MIL) never on Transmission control indicator lamp (TCIL) (OD off lamp) never on MIL always on TCIL (OD off lamp) always on

PINPOINT TEST 13 MIL / TCIL NEVER ON AND MIL / TCIL ALWAYS ON INSPECTION & ACTION

PINPOINT TEST 13		MIL/TCIL NEVER ON MIL/TCIL ALWAYS ON
STEP	INSPECTION		ACTION
1	WHICH WARNING INDICATOR IS CONCERN ASSOCIATED WITH? Is the symptom associated with the MIL or TCIL warning lamps?	Yes	Go to next step.
1		No	Service as required. See INSTRUMENT CLUSTER .
2	PRELIMINARY CHECKS Perform the following preliminary checks: Electrical connections System components relating to warning indicator Are all checks OK?	Yes	Go to next step.
2		No	Service as required. After repair, if no other symptoms are present, rerun quick test. See ON - BOARD DIAGNOSTIC TESTS .
3	CHECK SYSTEM INDICATOR LAMPS Is the symptom "TCIL never on" or "MIL never on" (this includes MIL never on during bulb check when the engine is first started)?	Yes	For TCIL Never On: See TRANSMISSION CONTROL SWITCH (TCS) OR TRANSMISSION CONTROL INDICATOR LAMP (TCIL) CIRCUIT MALFUNCTION . For MIL Never On: See GENERAL PINPOINT TEST 3: MALFUNCTION INDICATOR LAMP (MIL) .
3		No	Go to next step.
4	CHECK ENGINE OPERATION Does engine start?	Yes	Go to next step.
4	CHECK ENGINE OPERATION Does engine start?	No	See SYMPTOM TROUBLESHOOTING CHART - ENGINE DRIVEABILITY .
5	CHECK ENGINE IDLE IN PARK OR NEUTRAL Does engine idle rough in Park or Neutral?	Yes	See ENGINE POOR DRIVEABILITY .
5		No	Go to next step.
6	PERFORM PCM QUICK TEST Perform PCM quick test. See PCM QUICK TEST . Are any DTCs displayed during continuous memory self-tests, key on, engine off (KOEO) or key on, engine running (KOER)?	Yes	Check for cause. See DIAGNOSTIC TROUBLE CODE (DTC) INDEX - POWERTRAIN CONTROL MODULE (PCM) .
6		No	Go to step 8.
7	CHECK SYMPTOM INDICATOR WITH THE ENGINE RUNNING Is the MIL or TCIL always on with the engine running?	Yes	For MIL always on: See GENERAL PINPOINT TEST 3: MALFUNCTION INDICATOR LAMP (MIL) . For TCIL always on: See TRANSMISSION CONTROL SWITCH (TCS) OR TRANSMISSION CONTROL INDICATOR LAMP (TCIL) CIRCUIT MALFUNCTION .
7		No	Go to next step.
8	VERIFY TEST RESULTS Are test results OK?	Yes	Troubleshooting is complete.
8	VERIFY TEST RESULTS Are test results OK?	No	Service any additional symptoms. See SYMPTOM TROUBLESHOOTING CHART - ENGINE DRIVEABILITY .

RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready Tools Free Quote Check Quote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

• You smell fuel, burning insulation, or see smoke.
• Brakes feel soft, pull hard to one side, or make grinding noises.
• The engine overheats, stalls repeatedly, or misfires under load.
• You are missing required tools, torque specs, or safe lifting equipment.
• You are not confident in the next step or safety outcome.