跳转到主内容

GM公司品牌 庞蒂克

338 个问题 查看全部

Pontiac Montana not charging

2002 Pontiac Montana 3.4

Alternator was replaced with a new one not rebuilt, but still has same problem, new alternator was checked and it's okay. Check engine light is not on, and when code checker is plunged into computer it does not come on. How do you check ECM computer when code checker won't even come on?

回答此问题 我也有这个问题

这是一个好问题吗?

得分 0
添加一条评论

1个答案

最有帮助的答案

@jkeef make sure that you have a good battery and clean the battery contacts. Check your ground wires and clear of all corrosion. This "when code checker is plunged into computer it does not come on", sounds like a bad fuse. Check for power on your OBD2 connector. It is commonly fused with the cigarette lighter outlet. IF your OBD2 should get power, but still not work, then the issue is your ECM not the OBD.

Check the fusible link as well as the rest of the wiring as well as the fuses as outlined in the wiring diagram.

Block Image

这个答案有帮助吗?

得分 1

3条评论:

Here is what I have done so far. On this 2002 Pontiac Montana, I installed a new alternator and battery even replaced the ECM computer, all relays and fuses are good checked all wiring and grounds, but it's still not charging and all lights are so dim you can't see to drive at night, I don't know what else to do with it.

完成的

@jameslloyd98697

What is the voltage measurement across the battery terminals with the engine running?

It should measure 13.8V -14.5V DC.

If no good measure the voltage output from the alternator - see the diagram above for how the battery is charged B+ terminal on alternator → red wire → fuseable link → starter motor terminal → +ve battery terminal.

Be safety aware - ensure that the transmission is in park (AT) or neutral (MT) and that the parking brake is firmly applied as the engine is running.

完成的

@jameslloyd98697 you said ECM but I suppose that you are referring to the PCM, correct? You did check the Alt sense fuse in the fuse box under the hood correct?

完成的

添加一条评论

添加你的答案

J Keef 将永远感激不已
浏览统计数据:

过去 24 小时: 0

过去 7 天: 1

过去 30 天: 5

总计 59